./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash 0b778e020f927dcd69e8c93a4e5f815b351554054566b59c07b83f21be0bc1f1 --- 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-5e519f3 [2022-11-03 03:51:26,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:51:26,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:51:26,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:51:26,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:51:26,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:51:26,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:51:26,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:51:26,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:51:26,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:51:26,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:51:26,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:51:26,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:51:26,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:51:26,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:51:26,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:51:26,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:51:26,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:51:26,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:51:26,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:51:26,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:51:26,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:51:26,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:51:26,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:51:26,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:51:26,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:51:26,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:51:26,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:51:26,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:51:26,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:51:26,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:51:26,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:51:26,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:51:26,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:51:26,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:51:26,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:51:26,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:51:26,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:51:26,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:51:26,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:51:26,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:51:26,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:51:26,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:51:26,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:51:26,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:51:26,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:51:26,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:51:26,550 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:51:26,550 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:51:26,551 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:51:26,551 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:51:26,551 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:51:26,553 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:51:26,553 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:51:26,553 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:51:26,554 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:51:26,554 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:51:26,554 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:51:26,554 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:51:26,555 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:51:26,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:51:26,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:51:26,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:51:26,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:51:26,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:51:26,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:51:26,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:51:26,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:51:26,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:51:26,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:51:26,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:51:26,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:26,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:51:26,559 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:51:26,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:51:26,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:51:26,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:51:26,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:51:26,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:51:26,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:51:26,563 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_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b778e020f927dcd69e8c93a4e5f815b351554054566b59c07b83f21be0bc1f1 [2022-11-03 03:51:26,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:51:26,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:51:26,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:51:26,971 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:51:26,972 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:51:26,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c [2022-11-03 03:51:27,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/d9e4c4c1d/c1c225153d5a462e8e8aabe3bed235b7/FLAGdd9767e5a [2022-11-03 03:51:27,687 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:51:27,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c [2022-11-03 03:51:27,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/d9e4c4c1d/c1c225153d5a462e8e8aabe3bed235b7/FLAGdd9767e5a [2022-11-03 03:51:27,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/d9e4c4c1d/c1c225153d5a462e8e8aabe3bed235b7 [2022-11-03 03:51:27,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:51:27,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:51:27,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:27,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:51:27,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:51:27,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e474042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27, skipping insertion in model container [2022-11-03 03:51:27,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:51:28,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:51:28,179 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c[1107,1120] [2022-11-03 03:51:28,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:28,336 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:51:28,348 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c[1107,1120] [2022-11-03 03:51:28,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:28,425 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:51:28,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28 WrapperNode [2022-11-03 03:51:28,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:28,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:28,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:51:28,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:51:28,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,498 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 477 [2022-11-03 03:51:28,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:28,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:51:28,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:51:28,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:51:28,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,539 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:51:28,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:51:28,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:51:28,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:51:28,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (1/1) ... [2022-11-03 03:51:28,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:28,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:51:28,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:51:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:51:28,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:51:28,886 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:51:28,888 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:51:29,697 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:51:30,426 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:51:30,426 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:51:30,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:30 BoogieIcfgContainer [2022-11-03 03:51:30,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:51:30,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:51:30,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:51:30,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:51:30,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:51:27" (1/3) ... [2022-11-03 03:51:30,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e773cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:30, skipping insertion in model container [2022-11-03 03:51:30,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:28" (2/3) ... [2022-11-03 03:51:30,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e773cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:30, skipping insertion in model container [2022-11-03 03:51:30,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:30" (3/3) ... [2022-11-03 03:51:30,439 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_bcuvis32.c [2022-11-03 03:51:30,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:51:30,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:51:30,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:51:30,563 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;@44fdb99c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:51:30,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:51:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:51:30,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:30,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:51:30,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash 7874852, now seen corresponding path program 1 times [2022-11-03 03:51:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:30,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106257518] [2022-11-03 03:51:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:51:30,971 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:51:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:51:31,135 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:51:31,137 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:51:31,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:51:31,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:51:31,145 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:51:31,149 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:51:31,188 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:51:31,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:51:31 BoogieIcfgContainer [2022-11-03 03:51:31,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:51:31,210 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:51:31,210 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:51:31,210 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:51:31,212 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:30" (3/4) ... [2022-11-03 03:51:31,215 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:51:31,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:51:31,218 INFO L158 Benchmark]: Toolchain (without parser) took 3250.63ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 75.1MB in the beginning and 107.8MB in the end (delta: -32.7MB). Peak memory consumption was 538.3kB. Max. memory is 16.1GB. [2022-11-03 03:51:31,219 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 82.8MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:51:31,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 454.75ms. Allocated memory is still 109.1MB. Free memory was 74.9MB in the beginning and 78.6MB in the end (delta: -3.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:51:31,221 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.66ms. Allocated memory is still 109.1MB. Free memory was 78.0MB in the beginning and 73.3MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:51:31,228 INFO L158 Benchmark]: Boogie Preprocessor took 49.65ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 70.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:51:31,229 INFO L158 Benchmark]: RCFGBuilder took 1879.95ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 69.7MB in the beginning and 82.1MB in the end (delta: -12.4MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. [2022-11-03 03:51:31,231 INFO L158 Benchmark]: TraceAbstraction took 775.91ms. Allocated memory is still 142.6MB. Free memory was 81.0MB in the beginning and 107.8MB in the end (delta: -26.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-03 03:51:31,231 INFO L158 Benchmark]: Witness Printer took 6.71ms. Allocated memory is still 142.6MB. Free memory is still 107.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:51:31,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 82.8MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 454.75ms. Allocated memory is still 109.1MB. Free memory was 74.9MB in the beginning and 78.6MB in the end (delta: -3.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.66ms. Allocated memory is still 109.1MB. Free memory was 78.0MB in the beginning and 73.3MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.65ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 70.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1879.95ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 69.7MB in the beginning and 82.1MB in the end (delta: -12.4MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. * TraceAbstraction took 775.91ms. Allocated memory is still 142.6MB. Free memory was 81.0MB in the beginning and 107.8MB in the end (delta: -26.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Witness Printer took 6.71ms. Allocated memory is still 142.6MB. Free memory is still 107.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 145, overapproximation of bitwiseOr at line 143, overapproximation of bitwiseAnd at line 109. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 32); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (32 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 1); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (1 - 1); [L31] const SORT_16 mask_SORT_16 = (SORT_16)-1 >> (sizeof(SORT_16) * 8 - 2); [L32] const SORT_16 msb_SORT_16 = (SORT_16)1 << (2 - 1); [L34] const SORT_59 mask_SORT_59 = (SORT_59)-1 >> (sizeof(SORT_59) * 8 - 3); [L35] const SORT_59 msb_SORT_59 = (SORT_59)1 << (3 - 1); [L37] const SORT_16 var_17 = 0; [L38] const SORT_16 var_20 = 3; [L39] const SORT_3 var_22 = 1; [L40] const SORT_3 var_36 = 0; [L41] const SORT_16 var_77 = 2; [L42] const SORT_16 var_80 = 1; [L43] const SORT_59 var_92 = 0; [L45] SORT_1 input_2; [L46] SORT_3 input_4; [L47] SORT_1 input_5; [L48] SORT_3 input_6; [L49] SORT_3 input_7; [L50] SORT_3 input_8; [L51] SORT_1 input_9; [L52] SORT_3 input_10; [L53] SORT_3 input_11; [L54] SORT_1 input_12; [L55] SORT_3 input_13; [L56] SORT_3 input_14; [L57] SORT_3 input_15; [L58] SORT_1 input_32; [L59] SORT_3 input_34; [L60] SORT_1 input_39; [L61] SORT_3 input_41; [L62] SORT_1 input_47; [L63] SORT_1 input_53; [L64] SORT_1 input_55; [L65] SORT_1 input_57; [L66] SORT_59 input_60; [L67] SORT_59 input_66; [L68] SORT_1 input_69; [L69] SORT_3 input_73; [L71] SORT_16 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_16; [L72] SORT_3 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L73] SORT_3 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L74] SORT_3 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L75] SORT_3 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L76] SORT_3 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L77] SORT_3 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L78] SORT_3 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L79] SORT_3 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L80] SORT_3 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L82] SORT_16 init_19_arg_1 = var_17; [L83] state_18 = init_19_arg_1 [L84] SORT_3 init_24_arg_1 = var_22; [L85] state_23 = init_24_arg_1 [L86] SORT_3 init_38_arg_1 = var_36; [L87] state_37 = init_38_arg_1 [L88] SORT_3 init_44_arg_1 = var_36; [L89] state_43 = init_44_arg_1 [L90] SORT_3 init_46_arg_1 = var_36; [L91] state_45 = init_46_arg_1 [L92] SORT_3 init_50_arg_1 = var_36; [L93] state_49 = init_50_arg_1 [L94] SORT_3 init_52_arg_1 = var_36; [L95] state_51 = init_52_arg_1 [L96] SORT_3 init_63_arg_1 = var_36; [L97] state_62 = init_63_arg_1 [L98] SORT_3 init_65_arg_1 = var_36; [L99] state_64 = init_65_arg_1 [L100] SORT_3 init_72_arg_1 = var_36; [L101] state_71 = init_72_arg_1 VAL [init_19_arg_1=0, init_24_arg_1=1, init_38_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_72_arg_1=0, mask_SORT_1=4294967295, mask_SORT_16=3, mask_SORT_3=1, mask_SORT_59=7, msb_SORT_1=2147483648, msb_SORT_16=2, msb_SORT_3=1, msb_SORT_59=4, state_18=0, state_23=1, state_37=0, state_43=0, state_45=0, state_49=0, state_51=0, state_62=0, state_64=0, state_71=0, var_17=0, var_20=3, var_22=1, var_36=0, var_77=2, var_80=1, var_92=0] [L104] input_2 = __VERIFIER_nondet_uint() [L105] input_4 = __VERIFIER_nondet_uchar() [L106] input_5 = __VERIFIER_nondet_uint() [L107] input_6 = __VERIFIER_nondet_uchar() [L108] input_7 = __VERIFIER_nondet_uchar() [L109] input_7 = input_7 & mask_SORT_3 [L110] input_8 = __VERIFIER_nondet_uchar() [L111] input_8 = input_8 & mask_SORT_3 [L112] input_9 = __VERIFIER_nondet_uint() [L113] input_10 = __VERIFIER_nondet_uchar() [L114] input_10 = input_10 & mask_SORT_3 [L115] input_11 = __VERIFIER_nondet_uchar() [L116] input_11 = input_11 & mask_SORT_3 [L117] input_12 = __VERIFIER_nondet_uint() [L118] input_13 = __VERIFIER_nondet_uchar() [L119] input_14 = __VERIFIER_nondet_uchar() [L120] input_15 = __VERIFIER_nondet_uchar() [L121] input_32 = __VERIFIER_nondet_uint() [L122] input_34 = __VERIFIER_nondet_uchar() [L123] input_39 = __VERIFIER_nondet_uint() [L124] input_41 = __VERIFIER_nondet_uchar() [L125] input_47 = __VERIFIER_nondet_uint() [L126] input_53 = __VERIFIER_nondet_uint() [L127] input_55 = __VERIFIER_nondet_uint() [L128] input_57 = __VERIFIER_nondet_uint() [L129] input_60 = __VERIFIER_nondet_uchar() [L130] input_66 = __VERIFIER_nondet_uchar() [L131] input_69 = __VERIFIER_nondet_uint() [L132] input_73 = __VERIFIER_nondet_uchar() [L135] SORT_16 var_21_arg_0 = state_18; [L136] SORT_16 var_21_arg_1 = var_20; [L137] SORT_3 var_21 = var_21_arg_0 != var_21_arg_1; [L138] SORT_3 var_25_arg_0 = state_23; [L139] SORT_3 var_25_arg_1 = var_22; [L140] SORT_3 var_25 = var_25_arg_0 == var_25_arg_1; [L141] SORT_3 var_26_arg_0 = var_21; [L142] SORT_3 var_26_arg_1 = var_25; [L143] SORT_3 var_26 = var_26_arg_0 | var_26_arg_1; [L144] SORT_3 var_29_arg_0 = var_26; [L145] SORT_3 var_29 = ~var_29_arg_0; [L146] SORT_3 var_30_arg_0 = var_22; [L147] SORT_3 var_30_arg_1 = var_29; [L148] SORT_3 var_30 = var_30_arg_0 & var_30_arg_1; [L149] var_30 = var_30 & mask_SORT_3 [L150] SORT_3 bad_31_arg_0 = var_30; [L151] CALL __VERIFIER_assert(!(bad_31_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:51:31,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash 0b778e020f927dcd69e8c93a4e5f815b351554054566b59c07b83f21be0bc1f1 --- 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-5e519f3 [2022-11-03 03:51:33,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:51:33,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:51:33,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:51:33,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:51:33,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:51:33,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:51:33,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:51:33,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:51:33,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:51:33,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:51:33,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:51:33,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:51:33,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:51:33,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:51:33,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:51:33,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:51:33,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:51:33,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:51:33,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:51:33,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:51:33,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:51:33,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:51:33,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:51:33,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:51:33,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:51:33,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:51:33,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:51:33,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:51:33,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:51:33,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:51:33,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:51:33,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:51:33,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:51:33,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:51:33,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:51:33,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:51:33,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:51:34,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:51:34,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:51:34,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:51:34,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:51:34,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:51:34,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:51:34,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:51:34,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:51:34,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:51:34,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:51:34,059 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:51:34,059 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:51:34,059 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:51:34,060 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:51:34,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:51:34,061 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:51:34,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:51:34,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:51:34,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:51:34,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:51:34,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:51:34,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:51:34,064 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:51:34,064 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:51:34,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:51:34,064 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:51:34,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:51:34,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:51:34,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:51:34,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:51:34,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:34,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:51:34,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:51:34,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:51:34,067 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:51:34,067 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:34,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:51:34,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:51:34,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:51:34,068 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b778e020f927dcd69e8c93a4e5f815b351554054566b59c07b83f21be0bc1f1 [2022-11-03 03:51:34,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:51:34,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:51:34,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:51:34,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:51:34,597 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:51:34,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c [2022-11-03 03:51:34,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/878c09153/f842ae83be01469cb44fb45c2a688501/FLAGd8f8f2f47 [2022-11-03 03:51:35,353 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:51:35,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c [2022-11-03 03:51:35,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/878c09153/f842ae83be01469cb44fb45c2a688501/FLAGd8f8f2f47 [2022-11-03 03:51:35,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/data/878c09153/f842ae83be01469cb44fb45c2a688501 [2022-11-03 03:51:35,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:51:35,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:51:35,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:35,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:51:35,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:51:35,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:35" (1/1) ... [2022-11-03 03:51:35,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245004c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:35, skipping insertion in model container [2022-11-03 03:51:35,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:35" (1/1) ... [2022-11-03 03:51:35,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:51:35,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:51:35,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c[1107,1120] [2022-11-03 03:51:36,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:36,045 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:51:36,060 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_bcuvis32.c[1107,1120] [2022-11-03 03:51:36,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:36,199 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:51:36,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36 WrapperNode [2022-11-03 03:51:36,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:36,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:36,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:51:36,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:51:36,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,298 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 477 [2022-11-03 03:51:36,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:36,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:51:36,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:51:36,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:51:36,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,359 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:51:36,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:51:36,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:51:36,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:51:36,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (1/1) ... [2022-11-03 03:51:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:36,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:36,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:51:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:51:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:51:36,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:51:36,730 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:51:36,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:51:37,390 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:51:37,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:51:37,427 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:51:37,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:37 BoogieIcfgContainer [2022-11-03 03:51:37,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:51:37,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:51:37,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:51:37,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:51:37,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:51:35" (1/3) ... [2022-11-03 03:51:37,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18aa3afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:37, skipping insertion in model container [2022-11-03 03:51:37,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:36" (2/3) ... [2022-11-03 03:51:37,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18aa3afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:37, skipping insertion in model container [2022-11-03 03:51:37,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:37" (3/3) ... [2022-11-03 03:51:37,450 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_bcuvis32.c [2022-11-03 03:51:37,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:51:37,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:51:37,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:51:37,579 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;@764f349f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:51:37,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:51:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 67 states have (on average 1.492537313432836) internal successors, (100), 68 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:51:37,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:37,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:51:37,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:51:37,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:37,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819477021] [2022-11-03 03:51:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:37,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:37,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:37,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:37,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:51:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:37,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:37,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:38,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:38,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819477021] [2022-11-03 03:51:38,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819477021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:38,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:38,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196733107] [2022-11-03 03:51:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:38,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:38,211 INFO L87 Difference]: Start difference. First operand has 69 states, 67 states have (on average 1.492537313432836) internal successors, (100), 68 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:38,407 INFO L93 Difference]: Finished difference Result 194 states and 291 transitions. [2022-11-03 03:51:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 03:51:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:38,428 INFO L225 Difference]: With dead ends: 194 [2022-11-03 03:51:38,429 INFO L226 Difference]: Without dead ends: 127 [2022-11-03 03:51:38,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:38,444 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:38,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 256 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-03 03:51:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2022-11-03 03:51:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2022-11-03 03:51:38,509 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 5 [2022-11-03 03:51:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:38,509 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2022-11-03 03:51:38,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2022-11-03 03:51:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:38,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:38,515 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:38,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:38,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:38,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1357274601, now seen corresponding path program 1 times [2022-11-03 03:51:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603123883] [2022-11-03 03:51:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:38,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:38,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:38,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:51:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:51:39,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:39,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:39,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603123883] [2022-11-03 03:51:39,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603123883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:39,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:39,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:39,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735152560] [2022-11-03 03:51:39,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:39,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:39,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:39,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:39,094 INFO L87 Difference]: Start difference. First operand 67 states and 96 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:39,153 INFO L93 Difference]: Finished difference Result 251 states and 366 transitions. [2022-11-03 03:51:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:39,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:39,158 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:51:39,159 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:51:39,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:39,163 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 251 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:39,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 354 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:51:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 73. [2022-11-03 03:51:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 72 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 104 transitions. [2022-11-03 03:51:39,188 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 104 transitions. Word has length 66 [2022-11-03 03:51:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:39,188 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 104 transitions. [2022-11-03 03:51:39,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 104 transitions. [2022-11-03 03:51:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:39,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:39,196 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:39,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:39,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:39,407 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash -96357351, now seen corresponding path program 1 times [2022-11-03 03:51:39,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:39,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459753360] [2022-11-03 03:51:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:39,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:39,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:39,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:51:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:51:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:39,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:39,760 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459753360] [2022-11-03 03:51:39,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459753360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:39,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:39,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757271689] [2022-11-03 03:51:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:39,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:39,763 INFO L87 Difference]: Start difference. First operand 73 states and 104 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:39,872 INFO L93 Difference]: Finished difference Result 262 states and 379 transitions. [2022-11-03 03:51:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:39,874 INFO L225 Difference]: With dead ends: 262 [2022-11-03 03:51:39,874 INFO L226 Difference]: Without dead ends: 199 [2022-11-03 03:51:39,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:39,876 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 345 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:39,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 518 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-03 03:51:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 77. [2022-11-03 03:51:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 76 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-11-03 03:51:39,886 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 66 [2022-11-03 03:51:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:39,886 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-11-03 03:51:39,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-11-03 03:51:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:39,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:39,889 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:39,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:40,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:40,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash 347543323, now seen corresponding path program 1 times [2022-11-03 03:51:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583507943] [2022-11-03 03:51:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:40,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:40,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:40,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:51:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:40,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:51:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:40,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:40,452 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:40,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583507943] [2022-11-03 03:51:40,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583507943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:40,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:40,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849295691] [2022-11-03 03:51:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:40,456 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:40,615 INFO L93 Difference]: Finished difference Result 256 states and 369 transitions. [2022-11-03 03:51:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:40,617 INFO L225 Difference]: With dead ends: 256 [2022-11-03 03:51:40,617 INFO L226 Difference]: Without dead ends: 193 [2022-11-03 03:51:40,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:40,619 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 328 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:40,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 481 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-03 03:51:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 79. [2022-11-03 03:51:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 78 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 111 transitions. [2022-11-03 03:51:40,627 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 111 transitions. Word has length 66 [2022-11-03 03:51:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:40,627 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 111 transitions. [2022-11-03 03:51:40,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 111 transitions. [2022-11-03 03:51:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:40,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:40,629 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:40,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:40,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:40,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1681042787, now seen corresponding path program 1 times [2022-11-03 03:51:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:40,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782853942] [2022-11-03 03:51:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:40,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:40,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:40,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:51:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:41,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:51:41,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:41,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:41,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:41,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782853942] [2022-11-03 03:51:41,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782853942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:41,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:41,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129713712] [2022-11-03 03:51:41,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:41,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:41,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:41,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:41,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:41,280 INFO L87 Difference]: Start difference. First operand 79 states and 111 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:41,400 INFO L93 Difference]: Finished difference Result 268 states and 386 transitions. [2022-11-03 03:51:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:41,404 INFO L225 Difference]: With dead ends: 268 [2022-11-03 03:51:41,404 INFO L226 Difference]: Without dead ends: 205 [2022-11-03 03:51:41,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:41,408 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 337 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:41,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 515 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-03 03:51:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 83. [2022-11-03 03:51:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2022-11-03 03:51:41,422 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 66 [2022-11-03 03:51:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:41,423 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2022-11-03 03:51:41,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2022-11-03 03:51:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:41,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:41,425 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:41,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:41,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:41,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2034131169, now seen corresponding path program 1 times [2022-11-03 03:51:41,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109806573] [2022-11-03 03:51:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:41,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:41,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:41,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:51:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:41,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:51:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:42,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:42,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109806573] [2022-11-03 03:51:42,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109806573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:42,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:42,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223195812] [2022-11-03 03:51:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:42,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:42,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:42,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:42,013 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:42,087 INFO L93 Difference]: Finished difference Result 210 states and 301 transitions. [2022-11-03 03:51:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:42,090 INFO L225 Difference]: With dead ends: 210 [2022-11-03 03:51:42,091 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 03:51:42,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:42,095 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 155 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:42,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 284 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 03:51:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2022-11-03 03:51:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 84 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-11-03 03:51:42,111 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 66 [2022-11-03 03:51:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:42,111 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-11-03 03:51:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-11-03 03:51:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:42,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:42,113 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:42,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:42,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:42,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1367349789, now seen corresponding path program 1 times [2022-11-03 03:51:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:42,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662928577] [2022-11-03 03:51:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:42,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:42,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:42,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:51:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:51:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:42,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:42,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:42,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662928577] [2022-11-03 03:51:42,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662928577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:42,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:42,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:42,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260887463] [2022-11-03 03:51:42,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:42,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:42,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:42,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:42,682 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:42,889 INFO L93 Difference]: Finished difference Result 268 states and 384 transitions. [2022-11-03 03:51:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:42,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:42,891 INFO L225 Difference]: With dead ends: 268 [2022-11-03 03:51:42,891 INFO L226 Difference]: Without dead ends: 205 [2022-11-03 03:51:42,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:42,892 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 308 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:42,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 467 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:51:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-03 03:51:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 93. [2022-11-03 03:51:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 129 transitions. [2022-11-03 03:51:42,907 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 129 transitions. Word has length 66 [2022-11-03 03:51:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:42,909 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 129 transitions. [2022-11-03 03:51:42,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 129 transitions. [2022-11-03 03:51:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:42,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:42,911 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:42,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:43,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:43,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2026881311, now seen corresponding path program 1 times [2022-11-03 03:51:43,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:43,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765150812] [2022-11-03 03:51:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:43,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:43,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:43,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:51:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:43,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:43,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765150812] [2022-11-03 03:51:43,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765150812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:43,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:43,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:43,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980180270] [2022-11-03 03:51:43,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:43,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:43,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:43,508 INFO L87 Difference]: Start difference. First operand 93 states and 129 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:43,671 INFO L93 Difference]: Finished difference Result 256 states and 365 transitions. [2022-11-03 03:51:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:43,673 INFO L225 Difference]: With dead ends: 256 [2022-11-03 03:51:43,673 INFO L226 Difference]: Without dead ends: 193 [2022-11-03 03:51:43,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:43,674 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 278 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:43,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 449 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-03 03:51:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2022-11-03 03:51:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.3936170212765957) internal successors, (131), 94 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 131 transitions. [2022-11-03 03:51:43,682 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 131 transitions. Word has length 66 [2022-11-03 03:51:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:43,682 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 131 transitions. [2022-11-03 03:51:43,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 131 transitions. [2022-11-03 03:51:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:43,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:43,692 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:43,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:43,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:43,906 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1182875809, now seen corresponding path program 1 times [2022-11-03 03:51:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:43,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754817553] [2022-11-03 03:51:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:43,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:43,910 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:43,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:51:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:51:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:44,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:44,222 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:44,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754817553] [2022-11-03 03:51:44,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754817553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:44,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:44,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:44,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064653575] [2022-11-03 03:51:44,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:44,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:44,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:44,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:44,224 INFO L87 Difference]: Start difference. First operand 95 states and 131 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:44,263 INFO L93 Difference]: Finished difference Result 251 states and 359 transitions. [2022-11-03 03:51:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:44,265 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:51:44,265 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:51:44,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:44,269 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:44,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 347 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:51:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 97. [2022-11-03 03:51:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2022-11-03 03:51:44,278 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 66 [2022-11-03 03:51:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:44,278 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2022-11-03 03:51:44,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2022-11-03 03:51:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:44,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:44,280 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:44,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:44,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:44,496 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1110489251, now seen corresponding path program 1 times [2022-11-03 03:51:44,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:44,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563033322] [2022-11-03 03:51:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:44,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:44,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:44,499 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:44,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:51:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:51:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:44,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:44,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:44,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563033322] [2022-11-03 03:51:44,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563033322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:44,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:44,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:44,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19649760] [2022-11-03 03:51:44,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:44,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:44,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:44,796 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:44,827 INFO L93 Difference]: Finished difference Result 251 states and 358 transitions. [2022-11-03 03:51:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:44,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:44,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:44,829 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:51:44,829 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:51:44,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:44,831 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 163 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:44,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 346 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:51:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 105. [2022-11-03 03:51:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2022-11-03 03:51:44,837 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 66 [2022-11-03 03:51:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:44,837 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2022-11-03 03:51:44,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2022-11-03 03:51:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:44,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:44,839 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:44,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:45,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:45,053 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1251037861, now seen corresponding path program 1 times [2022-11-03 03:51:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:45,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035475598] [2022-11-03 03:51:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:45,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:45,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:45,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:45,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:51:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:45,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:51:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:45,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:45,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:45,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035475598] [2022-11-03 03:51:45,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035475598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:45,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:45,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671248367] [2022-11-03 03:51:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:45,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:45,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:45,458 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:45,620 INFO L93 Difference]: Finished difference Result 286 states and 407 transitions. [2022-11-03 03:51:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:45,622 INFO L225 Difference]: With dead ends: 286 [2022-11-03 03:51:45,622 INFO L226 Difference]: Without dead ends: 223 [2022-11-03 03:51:45,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:45,623 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 297 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:45,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 467 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-03 03:51:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 107. [2022-11-03 03:51:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 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) [2022-11-03 03:51:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2022-11-03 03:51:45,628 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 146 transitions. Word has length 66 [2022-11-03 03:51:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:45,629 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 146 transitions. [2022-11-03 03:51:45,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 146 transitions. [2022-11-03 03:51:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:45,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:45,630 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:45,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:45,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:45,844 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash -554400473, now seen corresponding path program 1 times [2022-11-03 03:51:45,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:45,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578323647] [2022-11-03 03:51:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:45,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:45,847 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:45,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:51:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:46,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:51:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:46,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:46,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578323647] [2022-11-03 03:51:46,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578323647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:46,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:46,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218343146] [2022-11-03 03:51:46,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:46,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:46,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:46,185 INFO L87 Difference]: Start difference. First operand 107 states and 146 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:46,217 INFO L93 Difference]: Finished difference Result 251 states and 356 transitions. [2022-11-03 03:51:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:46,219 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:51:46,220 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:51:46,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:46,221 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 151 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:46,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 344 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:51:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 109. [2022-11-03 03:51:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 108 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2022-11-03 03:51:46,228 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 66 [2022-11-03 03:51:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:46,229 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2022-11-03 03:51:46,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2022-11-03 03:51:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:46,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:46,230 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:46,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:46,439 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash -131698647, now seen corresponding path program 1 times [2022-11-03 03:51:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:46,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116169398] [2022-11-03 03:51:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:46,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:46,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:46,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:51:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:51:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:46,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:46,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:46,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116169398] [2022-11-03 03:51:46,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116169398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:46,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:46,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:46,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131568582] [2022-11-03 03:51:46,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:46,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:46,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:46,752 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:46,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:46,808 INFO L93 Difference]: Finished difference Result 251 states and 355 transitions. [2022-11-03 03:51:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:46,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:46,810 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:51:46,810 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:51:46,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:46,811 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 145 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:46,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 328 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:51:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 111. [2022-11-03 03:51:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 110 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 150 transitions. [2022-11-03 03:51:46,819 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 150 transitions. Word has length 66 [2022-11-03 03:51:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:46,819 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 150 transitions. [2022-11-03 03:51:46,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 150 transitions. [2022-11-03 03:51:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:46,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:46,820 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:46,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:47,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:47,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1820642389, now seen corresponding path program 1 times [2022-11-03 03:51:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:47,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845102198] [2022-11-03 03:51:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:47,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:47,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:47,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:47,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:51:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:51:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:47,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:47,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:47,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845102198] [2022-11-03 03:51:47,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845102198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:47,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:47,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:47,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119461271] [2022-11-03 03:51:47,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:47,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:47,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:47,349 INFO L87 Difference]: Start difference. First operand 111 states and 150 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:47,385 INFO L93 Difference]: Finished difference Result 251 states and 354 transitions. [2022-11-03 03:51:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:47,387 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:51:47,387 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:51:47,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:47,388 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 139 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:47,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 342 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:51:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2022-11-03 03:51:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3571428571428572) internal successors, (152), 112 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 152 transitions. [2022-11-03 03:51:47,393 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 152 transitions. Word has length 66 [2022-11-03 03:51:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:47,394 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 152 transitions. [2022-11-03 03:51:47,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 152 transitions. [2022-11-03 03:51:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:47,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:47,395 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:47,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:47,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:47,617 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash 885977005, now seen corresponding path program 1 times [2022-11-03 03:51:47,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:47,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105782344] [2022-11-03 03:51:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:47,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:47,621 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:47,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:51:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:47,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:51:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:47,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:47,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:47,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105782344] [2022-11-03 03:51:47,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105782344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:47,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:47,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046043696] [2022-11-03 03:51:47,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:47,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:47,987 INFO L87 Difference]: Start difference. First operand 113 states and 152 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:48,092 INFO L93 Difference]: Finished difference Result 242 states and 340 transitions. [2022-11-03 03:51:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:48,094 INFO L225 Difference]: With dead ends: 242 [2022-11-03 03:51:48,094 INFO L226 Difference]: Without dead ends: 179 [2022-11-03 03:51:48,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:48,095 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 195 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:48,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 405 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-03 03:51:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2022-11-03 03:51:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.353448275862069) internal successors, (157), 116 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) [2022-11-03 03:51:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2022-11-03 03:51:48,100 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 66 [2022-11-03 03:51:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:48,101 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2022-11-03 03:51:48,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2022-11-03 03:51:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:48,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:48,102 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:48,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:48,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:48,318 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:48,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:48,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1472783019, now seen corresponding path program 1 times [2022-11-03 03:51:48,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:48,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558962738] [2022-11-03 03:51:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:48,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:48,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:48,322 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:48,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:51:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:51:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:48,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:48,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:48,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558962738] [2022-11-03 03:51:48,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558962738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:48,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:48,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:51:48,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299247889] [2022-11-03 03:51:48,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:48,831 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:48,982 INFO L93 Difference]: Finished difference Result 298 states and 420 transitions. [2022-11-03 03:51:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:48,992 INFO L225 Difference]: With dead ends: 298 [2022-11-03 03:51:48,992 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 03:51:48,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:51:48,993 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 268 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:48,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 455 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 03:51:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 123. [2022-11-03 03:51:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 122 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 165 transitions. [2022-11-03 03:51:49,010 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 165 transitions. Word has length 66 [2022-11-03 03:51:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:49,011 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 165 transitions. [2022-11-03 03:51:49,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 165 transitions. [2022-11-03 03:51:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:49,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:49,014 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:49,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:49,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:49,229 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1047176915, now seen corresponding path program 1 times [2022-11-03 03:51:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:49,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116628959] [2022-11-03 03:51:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:49,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:49,231 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:49,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:51:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:51:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:49,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:49,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:49,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116628959] [2022-11-03 03:51:49,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116628959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:49,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:49,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:49,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942679249] [2022-11-03 03:51:49,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:49,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:49,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:49,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:49,566 INFO L87 Difference]: Start difference. First operand 123 states and 165 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:49,618 INFO L93 Difference]: Finished difference Result 251 states and 351 transitions. [2022-11-03 03:51:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:51:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:49,619 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:51:49,619 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:51:49,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:51:49,620 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 106 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:49,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 339 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:51:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 125. [2022-11-03 03:51:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 167 transitions. [2022-11-03 03:51:49,633 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 167 transitions. Word has length 66 [2022-11-03 03:51:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:49,633 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 167 transitions. [2022-11-03 03:51:49,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 167 transitions. [2022-11-03 03:51:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:51:49,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:49,635 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:49,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:49,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:49,843 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1045329873, now seen corresponding path program 1 times [2022-11-03 03:51:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:49,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5074416] [2022-11-03 03:51:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:49,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:49,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:49,846 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:49,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:51:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:51:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:50,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:51,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5074416] [2022-11-03 03:51:51,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5074416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:51,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [867659367] [2022-11-03 03:51:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:51,829 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:51,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:51,835 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:51,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 03:51:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:52,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:51:52,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:52,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:53,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [867659367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:53,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815014928] [2022-11-03 03:51:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:53,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:53,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:53,422 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:53,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:51:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:51:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:54,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:55,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815014928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:55,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:55,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 8, 9] total 15 [2022-11-03 03:51:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127439905] [2022-11-03 03:51:55,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:55,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:51:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:51:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:51:55,112 INFO L87 Difference]: Start difference. First operand 125 states and 167 transitions. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:55,588 INFO L93 Difference]: Finished difference Result 250 states and 349 transitions. [2022-11-03 03:51:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:51:55,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 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 66 [2022-11-03 03:51:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:55,590 INFO L225 Difference]: With dead ends: 250 [2022-11-03 03:51:55,590 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 03:51:55,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 372 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:51:55,592 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 692 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:55,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 1017 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-11-03 03:51:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 03:51:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 186. [2022-11-03 03:51:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 185 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 257 transitions. [2022-11-03 03:51:55,600 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 257 transitions. Word has length 66 [2022-11-03 03:51:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:55,600 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 257 transitions. [2022-11-03 03:51:55,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 257 transitions. [2022-11-03 03:51:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:51:55,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:55,602 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:55,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:55,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:56,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:56,217 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1462844367, now seen corresponding path program 1 times [2022-11-03 03:51:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:56,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017631379] [2022-11-03 03:51:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:56,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:56,219 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:56,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:51:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:51:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:56,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:57,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:57,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017631379] [2022-11-03 03:51:57,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017631379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:57,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190225694] [2022-11-03 03:51:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:57,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:57,166 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:57,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:51:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:51:57,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:57,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [190225694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:57,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:57,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 9] total 16 [2022-11-03 03:51:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887344726] [2022-11-03 03:51:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:57,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:51:57,727 INFO L87 Difference]: Start difference. First operand 186 states and 257 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:57,861 INFO L93 Difference]: Finished difference Result 674 states and 962 transitions. [2022-11-03 03:51:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:57,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 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 127 [2022-11-03 03:51:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:57,866 INFO L225 Difference]: With dead ends: 674 [2022-11-03 03:51:57,867 INFO L226 Difference]: Without dead ends: 496 [2022-11-03 03:51:57,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:51:57,868 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 451 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:57,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 326 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-03 03:51:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 266. [2022-11-03 03:51:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.411320754716981) internal successors, (374), 265 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 374 transitions. [2022-11-03 03:51:57,877 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 374 transitions. Word has length 127 [2022-11-03 03:51:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:57,878 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 374 transitions. [2022-11-03 03:51:57,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 374 transitions. [2022-11-03 03:51:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:51:57,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:57,880 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:57,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:58,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-11-03 03:51:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:58,296 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1143179187, now seen corresponding path program 1 times [2022-11-03 03:51:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:58,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337947007] [2022-11-03 03:51:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:58,298 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:58,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:51:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:51:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:58,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:59,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337947007] [2022-11-03 03:51:59,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337947007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635637578] [2022-11-03 03:51:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:59,202 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:59,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:59,204 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:59,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 03:51:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:59,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:51:59,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:59,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1635637578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:59,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:59,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 9] total 16 [2022-11-03 03:51:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343146036] [2022-11-03 03:51:59,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:51:59,752 INFO L87 Difference]: Start difference. First operand 266 states and 374 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:59,850 INFO L93 Difference]: Finished difference Result 992 states and 1436 transitions. [2022-11-03 03:51:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:51:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-03 03:51:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:59,855 INFO L225 Difference]: With dead ends: 992 [2022-11-03 03:51:59,855 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 03:51:59,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:51:59,856 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 300 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:59,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 631 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 03:51:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 378. [2022-11-03 03:51:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.427055702917772) internal successors, (538), 377 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) [2022-11-03 03:51:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 538 transitions. [2022-11-03 03:51:59,870 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 538 transitions. Word has length 127 [2022-11-03 03:51:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:59,870 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 538 transitions. [2022-11-03 03:51:59,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 538 transitions. [2022-11-03 03:51:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:51:59,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:59,873 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:59,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:00,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:52:00,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:00,276 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:00,277 INFO L85 PathProgramCache]: Analyzing trace with hash -136684491, now seen corresponding path program 1 times [2022-11-03 03:52:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:00,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664925292] [2022-11-03 03:52:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:00,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:00,279 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:00,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:52:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:52:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:00,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:01,138 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:01,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664925292] [2022-11-03 03:52:01,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664925292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:01,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [570756245] [2022-11-03 03:52:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:01,139 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:01,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:01,143 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:01,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 03:52:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:52:01,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:01,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [570756245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:01,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:01,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 9] total 16 [2022-11-03 03:52:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489143110] [2022-11-03 03:52:01,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:01,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:01,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:01,628 INFO L87 Difference]: Start difference. First operand 378 states and 538 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:01,729 INFO L93 Difference]: Finished difference Result 1552 states and 2248 transitions. [2022-11-03 03:52:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:52:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 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 127 [2022-11-03 03:52:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:01,734 INFO L225 Difference]: With dead ends: 1552 [2022-11-03 03:52:01,734 INFO L226 Difference]: Without dead ends: 1236 [2022-11-03 03:52:01,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:52:01,736 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 458 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:01,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 431 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:52:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-11-03 03:52:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 590. [2022-11-03 03:52:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.4397283531409168) internal successors, (848), 589 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 848 transitions. [2022-11-03 03:52:01,756 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 848 transitions. Word has length 127 [2022-11-03 03:52:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:01,756 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 848 transitions. [2022-11-03 03:52:01,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 848 transitions. [2022-11-03 03:52:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:52:01,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:01,758 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:01,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 03:52:01,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 03:52:02,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:02,162 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash 450121523, now seen corresponding path program 1 times [2022-11-03 03:52:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:02,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271843061] [2022-11-03 03:52:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:02,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:02,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:02,164 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:02,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:52:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:52:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:02,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:03,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271843061] [2022-11-03 03:52:03,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271843061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1569808488] [2022-11-03 03:52:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:03,027 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:03,028 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:03,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:52:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:03,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:52:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:04,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1569808488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:04,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62986219] [2022-11-03 03:52:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:04,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:04,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:04,049 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:04,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 03:52:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:52:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:04,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:04,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62986219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:04,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:52:04,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 9, 10, 9] total 19 [2022-11-03 03:52:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925647314] [2022-11-03 03:52:04,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:04,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:52:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:52:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:52:04,585 INFO L87 Difference]: Start difference. First operand 590 states and 848 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:04,970 INFO L93 Difference]: Finished difference Result 2354 states and 3419 transitions. [2022-11-03 03:52:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:52:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 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 127 [2022-11-03 03:52:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:04,974 INFO L225 Difference]: With dead ends: 2354 [2022-11-03 03:52:04,974 INFO L226 Difference]: Without dead ends: 1826 [2022-11-03 03:52:04,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:52:04,977 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 348 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:04,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 459 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:52:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-11-03 03:52:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 822. [2022-11-03 03:52:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.4372716199756395) internal successors, (1180), 821 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1180 transitions. [2022-11-03 03:52:05,000 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1180 transitions. Word has length 127 [2022-11-03 03:52:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:05,000 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1180 transitions. [2022-11-03 03:52:05,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1180 transitions. [2022-11-03 03:52:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:52:05,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:05,003 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:05,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:05,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:05,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-03 03:52:05,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:05,623 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1151721397, now seen corresponding path program 1 times [2022-11-03 03:52:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263289528] [2022-11-03 03:52:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:05,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:05,625 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:05,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:52:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:52:05,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:06,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:06,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:06,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263289528] [2022-11-03 03:52:06,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263289528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:06,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61582306] [2022-11-03 03:52:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:06,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:06,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:06,415 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:06,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 03:52:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:52:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 03:52:07,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:07,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61582306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402245708] [2022-11-03 03:52:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:07,495 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:07,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 03:52:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:07,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:52:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:08,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:08,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402245708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:08,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:08,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7, 8, 8, 8] total 25 [2022-11-03 03:52:08,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350894776] [2022-11-03 03:52:08,806 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:08,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:52:08,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:08,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:52:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:52:08,808 INFO L87 Difference]: Start difference. First operand 822 states and 1180 transitions. Second operand has 25 states, 25 states have (on average 15.92) internal successors, (398), 25 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:11,277 INFO L93 Difference]: Finished difference Result 4686 states and 6773 transitions. [2022-11-03 03:52:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 03:52:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 15.92) internal successors, (398), 25 states have internal predecessors, (398), 0 states have call successors, (0), 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 127 [2022-11-03 03:52:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:11,290 INFO L225 Difference]: With dead ends: 4686 [2022-11-03 03:52:11,290 INFO L226 Difference]: Without dead ends: 3900 [2022-11-03 03:52:11,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=732, Invalid=2808, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 03:52:11,293 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 2320 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2320 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:11,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2320 Valid, 3037 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 803 Invalid, 0 Unknown, 188 Unchecked, 0.9s Time] [2022-11-03 03:52:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2022-11-03 03:52:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 1348. [2022-11-03 03:52:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 1.4105419450631032) internal successors, (1900), 1347 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1900 transitions. [2022-11-03 03:52:11,341 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1900 transitions. Word has length 127 [2022-11-03 03:52:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:11,341 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1900 transitions. [2022-11-03 03:52:11,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 15.92) internal successors, (398), 25 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1900 transitions. [2022-11-03 03:52:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:52:11,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:11,344 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:11,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-03 03:52:11,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:11,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-03 03:52:11,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:11,948 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1578464587, now seen corresponding path program 1 times [2022-11-03 03:52:11,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:11,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262295574] [2022-11-03 03:52:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:11,951 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:11,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:52:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:12,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:52:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:52:12,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:12,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262295574] [2022-11-03 03:52:12,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262295574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:12,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014539627] [2022-11-03 03:52:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:12,773 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:12,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:12,775 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:12,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:52:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:52:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:13,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:14,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014539627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:14,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335450036] [2022-11-03 03:52:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:14,395 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 03:52:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:52:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:52:15,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:52:15,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335450036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:15,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:15,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 11, 8, 8] total 36 [2022-11-03 03:52:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988449750] [2022-11-03 03:52:15,840 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:15,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:52:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:52:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:52:15,843 INFO L87 Difference]: Start difference. First operand 1348 states and 1900 transitions. Second operand has 36 states, 36 states have (on average 14.166666666666666) internal successors, (510), 36 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:24,713 INFO L93 Difference]: Finished difference Result 7652 states and 10684 transitions. [2022-11-03 03:52:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-03 03:52:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 14.166666666666666) internal successors, (510), 36 states have internal predecessors, (510), 0 states have call successors, (0), 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 127 [2022-11-03 03:52:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:24,732 INFO L225 Difference]: With dead ends: 7652 [2022-11-03 03:52:24,732 INFO L226 Difference]: Without dead ends: 6366 [2022-11-03 03:52:24,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 723 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3163 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2090, Invalid=9466, Unknown=0, NotChecked=0, Total=11556 [2022-11-03 03:52:24,738 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 4428 mSDsluCounter, 5032 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4428 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:24,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4428 Valid, 5131 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 944 Invalid, 0 Unknown, 538 Unchecked, 1.1s Time] [2022-11-03 03:52:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-11-03 03:52:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 1380. [2022-11-03 03:52:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 1.3778100072516317) internal successors, (1900), 1379 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1900 transitions. [2022-11-03 03:52:24,828 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1900 transitions. Word has length 127 [2022-11-03 03:52:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:24,828 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 1900 transitions. [2022-11-03 03:52:24,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 14.166666666666666) internal successors, (510), 36 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1900 transitions. [2022-11-03 03:52:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:52:24,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:24,831 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:24,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:25,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 03:52:25,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-03 03:52:25,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:25,459 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1762938567, now seen corresponding path program 1 times [2022-11-03 03:52:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:25,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749287122] [2022-11-03 03:52:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:25,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:25,462 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:25,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:52:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:52:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 03:52:26,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:26,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749287122] [2022-11-03 03:52:26,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749287122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235823027] [2022-11-03 03:52:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:26,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:26,369 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:26,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 03:52:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:52:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:52:27,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:27,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1235823027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928691382] [2022-11-03 03:52:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:27,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:27,569 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:27,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 03:52:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:52:27,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:52:27,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:27,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928691382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:27,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:52:27,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 9, 10, 9] total 16 [2022-11-03 03:52:27,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775792167] [2022-11-03 03:52:27,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:27,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:27,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:27,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:27,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:27,847 INFO L87 Difference]: Start difference. First operand 1380 states and 1900 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:27,962 INFO L93 Difference]: Finished difference Result 4346 states and 6035 transitions. [2022-11-03 03:52:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:52:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 127 [2022-11-03 03:52:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:27,967 INFO L225 Difference]: With dead ends: 4346 [2022-11-03 03:52:27,967 INFO L226 Difference]: Without dead ends: 3028 [2022-11-03 03:52:27,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:52:27,970 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 448 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:27,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 508 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:52:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2022-11-03 03:52:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1508. [2022-11-03 03:52:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 1.366954213669542) internal successors, (2060), 1507 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 2060 transitions. [2022-11-03 03:52:28,016 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 2060 transitions. Word has length 127 [2022-11-03 03:52:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:28,016 INFO L495 AbstractCegarLoop]: Abstraction has 1508 states and 2060 transitions. [2022-11-03 03:52:28,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:28,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 2060 transitions. [2022-11-03 03:52:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:52:28,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:28,019 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:28,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:28,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 03:52:28,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-03 03:52:28,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:28,628 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:28,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:28,629 INFO L85 PathProgramCache]: Analyzing trace with hash 726590395, now seen corresponding path program 1 times [2022-11-03 03:52:28,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:28,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234282590] [2022-11-03 03:52:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:28,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:28,630 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:28,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:52:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:28,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:52:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 03:52:29,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:29,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234282590] [2022-11-03 03:52:29,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234282590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443998783] [2022-11-03 03:52:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:29,648 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:29,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:29,651 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:29,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 03:52:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:52:30,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:52:30,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:30,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [443998783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591038661] [2022-11-03 03:52:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:30,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:30,732 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:30,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 03:52:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:52:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:52:31,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:31,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591038661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:31,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:52:31,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 9, 10, 9] total 16 [2022-11-03 03:52:31,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685263366] [2022-11-03 03:52:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:31,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:52:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:52:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:31,048 INFO L87 Difference]: Start difference. First operand 1508 states and 2060 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:31,367 INFO L93 Difference]: Finished difference Result 5002 states and 6891 transitions. [2022-11-03 03:52:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:52:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 127 [2022-11-03 03:52:31,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:31,374 INFO L225 Difference]: With dead ends: 5002 [2022-11-03 03:52:31,374 INFO L226 Difference]: Without dead ends: 3556 [2022-11-03 03:52:31,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:52:31,379 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 470 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:31,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 525 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:52:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2022-11-03 03:52:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 1624. [2022-11-03 03:52:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 1.3653727664818238) internal successors, (2216), 1623 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2216 transitions. [2022-11-03 03:52:31,426 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2216 transitions. Word has length 127 [2022-11-03 03:52:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:31,426 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2216 transitions. [2022-11-03 03:52:31,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2216 transitions. [2022-11-03 03:52:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:52:31,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:31,428 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:52:31,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:31,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 03:52:31,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-03 03:52:32,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:32,035 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1793369539, now seen corresponding path program 1 times [2022-11-03 03:52:32,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:32,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025280717] [2022-11-03 03:52:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:32,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:32,038 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:32,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:52:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:32,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:52:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:52:32,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:52:35,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:35,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025280717] [2022-11-03 03:52:35,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025280717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:35,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1282265237] [2022-11-03 03:52:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:35,026 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:35,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 03:52:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:35,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:52:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:52:36,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:52:37,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1282265237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:37,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016833155] [2022-11-03 03:52:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:37,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:37,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:37,472 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:37,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 03:52:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:52:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:52:38,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:52:39,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016833155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:39,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:39,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 26 [2022-11-03 03:52:39,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073661690] [2022-11-03 03:52:39,700 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:39,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:52:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:39,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:52:39,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:52:39,702 INFO L87 Difference]: Start difference. First operand 1624 states and 2216 transitions. Second operand has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 26 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:41,597 INFO L93 Difference]: Finished difference Result 3554 states and 4854 transitions. [2022-11-03 03:52:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:52:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 26 states have internal predecessors, (202), 0 states have call successors, (0), 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 127 [2022-11-03 03:52:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:41,606 INFO L225 Difference]: With dead ends: 3554 [2022-11-03 03:52:41,607 INFO L226 Difference]: Without dead ends: 3552 [2022-11-03 03:52:41,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 731 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=734, Invalid=2458, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 03:52:41,609 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 1651 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:41,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 3076 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 344 Invalid, 0 Unknown, 496 Unchecked, 0.4s Time] [2022-11-03 03:52:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2022-11-03 03:52:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 1718. [2022-11-03 03:52:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 1.3616773442050087) internal successors, (2338), 1717 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2338 transitions. [2022-11-03 03:52:41,655 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2338 transitions. Word has length 127 [2022-11-03 03:52:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:41,655 INFO L495 AbstractCegarLoop]: Abstraction has 1718 states and 2338 transitions. [2022-11-03 03:52:41,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 26 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2338 transitions. [2022-11-03 03:52:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:52:41,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:41,660 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:52:41,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:41,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 03:52:42,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 03:52:42,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:42,280 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash -19310871, now seen corresponding path program 1 times [2022-11-03 03:52:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:42,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826556709] [2022-11-03 03:52:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:42,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:42,283 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:42,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:52:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:52:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 66 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:52:43,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 66 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:52:44,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826556709] [2022-11-03 03:52:44,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826556709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [279979281] [2022-11-03 03:52:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:44,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:44,262 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:44,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 03:52:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:52:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 60 proven. 106 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:52:45,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 60 proven. 106 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:52:45,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [279979281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570455058] [2022-11-03 03:52:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:45,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:45,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:45,991 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:45,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 03:52:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:52:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 72 proven. 50 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:52:47,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 72 proven. 50 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:52:48,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570455058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:48,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:48,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16, 16, 8, 8] total 41 [2022-11-03 03:52:48,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589338973] [2022-11-03 03:52:48,086 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:48,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 03:52:48,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 03:52:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 03:52:48,088 INFO L87 Difference]: Start difference. First operand 1718 states and 2338 transitions. Second operand has 41 states, 41 states have (on average 11.195121951219512) internal successors, (459), 41 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:01,562 INFO L93 Difference]: Finished difference Result 12104 states and 16258 transitions. [2022-11-03 03:53:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-11-03 03:53:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 11.195121951219512) internal successors, (459), 41 states have internal predecessors, (459), 0 states have call successors, (0), 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 188 [2022-11-03 03:53:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:01,594 INFO L225 Difference]: With dead ends: 12104 [2022-11-03 03:53:01,595 INFO L226 Difference]: Without dead ends: 11021 [2022-11-03 03:53:01,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1084 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13847 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=5684, Invalid=36136, Unknown=0, NotChecked=0, Total=41820 [2022-11-03 03:53:01,610 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 7216 mSDsluCounter, 7479 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7216 SdHoareTripleChecker+Valid, 7874 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1839 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:01,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7216 Valid, 7874 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 1189 Invalid, 0 Unknown, 1839 Unchecked, 1.4s Time] [2022-11-03 03:53:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11021 states. [2022-11-03 03:53:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11021 to 2347. [2022-11-03 03:53:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 1.3444160272804775) internal successors, (3154), 2346 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3154 transitions. [2022-11-03 03:53:01,763 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3154 transitions. Word has length 188 [2022-11-03 03:53:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:01,764 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 3154 transitions. [2022-11-03 03:53:01,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 11.195121951219512) internal successors, (459), 41 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3154 transitions. [2022-11-03 03:53:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:53:01,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:01,794 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:53:01,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:02,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:02,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 03:53:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:02,401 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash 147672687, now seen corresponding path program 1 times [2022-11-03 03:53:02,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:02,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279133578] [2022-11-03 03:53:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:02,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:02,404 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:02,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 03:53:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:53:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 76 proven. 90 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:53:03,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 76 proven. 90 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:53:04,417 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279133578] [2022-11-03 03:53:04,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279133578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [279411389] [2022-11-03 03:53:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:04,418 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:04,419 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:04,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 03:53:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:04,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-03 03:53:05,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:05,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [279411389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:05,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:53:05,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 17] total 33 [2022-11-03 03:53:05,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206731238] [2022-11-03 03:53:05,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:05,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:05,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:53:05,035 INFO L87 Difference]: Start difference. First operand 2347 states and 3154 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:05,176 INFO L93 Difference]: Finished difference Result 4675 states and 6284 transitions. [2022-11-03 03:53:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:53:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 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 188 [2022-11-03 03:53:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:05,182 INFO L225 Difference]: With dead ends: 4675 [2022-11-03 03:53:05,182 INFO L226 Difference]: Without dead ends: 3091 [2022-11-03 03:53:05,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:53:05,186 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 225 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:05,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 527 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2022-11-03 03:53:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 1748. [2022-11-03 03:53:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 1.3257012020606755) internal successors, (2316), 1747 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2316 transitions. [2022-11-03 03:53:05,236 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2316 transitions. Word has length 188 [2022-11-03 03:53:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:05,237 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2316 transitions. [2022-11-03 03:53:05,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2316 transitions. [2022-11-03 03:53:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:53:05,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:05,242 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:53:05,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 03:53:05,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:05,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:05,659 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash 75286129, now seen corresponding path program 2 times [2022-11-03 03:53:05,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:05,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142012688] [2022-11-03 03:53:05,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:53:05,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:05,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:05,661 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:05,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 03:53:05,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:53:05,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:05,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:53:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 76 proven. 90 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:53:06,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 76 proven. 90 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:53:07,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:07,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142012688] [2022-11-03 03:53:07,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142012688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304300798] [2022-11-03 03:53:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:53:07,575 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:07,576 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:07,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 03:53:08,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:53:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-03 03:53:08,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:08,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304300798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:08,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:53:08,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 17] total 33 [2022-11-03 03:53:08,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632265926] [2022-11-03 03:53:08,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:08,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:08,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:53:08,208 INFO L87 Difference]: Start difference. First operand 1748 states and 2316 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:08,330 INFO L93 Difference]: Finished difference Result 4592 states and 6104 transitions. [2022-11-03 03:53:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:53:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 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 188 [2022-11-03 03:53:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:08,335 INFO L225 Difference]: With dead ends: 4592 [2022-11-03 03:53:08,335 INFO L226 Difference]: Without dead ends: 2906 [2022-11-03 03:53:08,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:53:08,338 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 260 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:08,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 473 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-11-03 03:53:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 1824. [2022-11-03 03:53:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 1.3236423477783872) internal successors, (2413), 1823 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2413 transitions. [2022-11-03 03:53:08,382 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2413 transitions. Word has length 188 [2022-11-03 03:53:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:08,382 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 2413 transitions. [2022-11-03 03:53:08,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2413 transitions. [2022-11-03 03:53:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:53:08,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:08,392 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:53:08,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-03 03:53:08,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 03:53:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:08,796 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash 77133171, now seen corresponding path program 3 times [2022-11-03 03:53:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122772448] [2022-11-03 03:53:08,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:53:08,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:08,798 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:08,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 03:53:08,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:53:08,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:09,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:53:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 03:53:10,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 03:53:13,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122772448] [2022-11-03 03:53:13,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122772448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1521418195] [2022-11-03 03:53:13,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:53:13,316 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:13,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:13,319 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:13,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 03:53:13,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:53:13,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:13,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:53:13,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:53:15,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:53:18,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1521418195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:18,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539870399] [2022-11-03 03:53:18,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:53:18,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:18,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:18,617 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:18,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-03 03:53:18,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:53:18,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:53:18,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 03:53:20,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 03:53:26,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539870399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:26,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:26,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 13, 13, 13, 13] total 52 [2022-11-03 03:53:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502924681] [2022-11-03 03:53:26,153 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:26,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 03:53:26,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 03:53:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2427, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 03:53:26,156 INFO L87 Difference]: Start difference. First operand 1824 states and 2413 transitions. Second operand has 52 states, 52 states have (on average 12.961538461538462) internal successors, (674), 52 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:32,371 INFO L93 Difference]: Finished difference Result 4864 states and 6454 transitions. [2022-11-03 03:53:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 03:53:32,372 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 12.961538461538462) internal successors, (674), 52 states have internal predecessors, (674), 0 states have call successors, (0), 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 188 [2022-11-03 03:53:32,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:32,377 INFO L225 Difference]: With dead ends: 4864 [2022-11-03 03:53:32,377 INFO L226 Difference]: Without dead ends: 3016 [2022-11-03 03:53:32,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1076 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1848, Invalid=7272, Unknown=0, NotChecked=0, Total=9120 [2022-11-03 03:53:32,381 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1532 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:32,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 1873 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 316 Invalid, 0 Unknown, 318 Unchecked, 0.4s Time] [2022-11-03 03:53:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2022-11-03 03:53:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 1498. [2022-11-03 03:53:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.3206412825651304) internal successors, (1977), 1497 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 1977 transitions. [2022-11-03 03:53:32,418 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 1977 transitions. Word has length 188 [2022-11-03 03:53:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:32,419 INFO L495 AbstractCegarLoop]: Abstraction has 1498 states and 1977 transitions. [2022-11-03 03:53:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 12.961538461538462) internal successors, (674), 52 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 1977 transitions. [2022-11-03 03:53:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:53:32,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:32,422 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:53:32,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-03 03:53:32,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:32,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-03 03:53:33,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:33,027 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:33,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:33,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1023196277, now seen corresponding path program 1 times [2022-11-03 03:53:33,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:33,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624473057] [2022-11-03 03:53:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:33,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:33,029 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 03:53:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:53:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 150 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:53:34,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 150 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:53:35,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:35,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624473057] [2022-11-03 03:53:35,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624473057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:35,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [132798826] [2022-11-03 03:53:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:35,148 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:35,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:35,149 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:35,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 03:53:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:53:35,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 152 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:53:36,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 150 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:53:37,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [132798826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649428955] [2022-11-03 03:53:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:37,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:37,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:37,154 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:37,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 03:53:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:53:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 03:53:38,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 03:53:39,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649428955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:39,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:39,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 17, 8, 8] total 38 [2022-11-03 03:53:39,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227789246] [2022-11-03 03:53:39,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:39,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:53:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:53:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:53:39,199 INFO L87 Difference]: Start difference. First operand 1498 states and 1977 transitions. Second operand has 38 states, 38 states have (on average 13.157894736842104) internal successors, (500), 38 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:50,952 INFO L93 Difference]: Finished difference Result 12865 states and 16975 transitions. [2022-11-03 03:53:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-11-03 03:53:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 13.157894736842104) internal successors, (500), 38 states have internal predecessors, (500), 0 states have call successors, (0), 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 188 [2022-11-03 03:53:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:50,970 INFO L225 Difference]: With dead ends: 12865 [2022-11-03 03:53:50,970 INFO L226 Difference]: Without dead ends: 11353 [2022-11-03 03:53:50,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1085 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8697 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4605, Invalid=24125, Unknown=0, NotChecked=0, Total=28730 [2022-11-03 03:53:50,979 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 3558 mSDsluCounter, 7152 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3558 SdHoareTripleChecker+Valid, 7550 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:50,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3558 Valid, 7550 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2885 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 03:53:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11353 states. [2022-11-03 03:53:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11353 to 2022. [2022-11-03 03:53:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 1.3196437407224146) internal successors, (2667), 2021 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 2667 transitions. [2022-11-03 03:53:51,066 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 2667 transitions. Word has length 188 [2022-11-03 03:53:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:51,066 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 2667 transitions. [2022-11-03 03:53:51,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 13.157894736842104) internal successors, (500), 38 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 2667 transitions. [2022-11-03 03:53:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:53:51,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:51,072 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:53:51,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:51,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:51,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 03:53:51,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:51,695 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1703254647, now seen corresponding path program 1 times [2022-11-03 03:53:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444016053] [2022-11-03 03:53:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:51,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:51,697 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:51,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 03:53:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:52,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:53:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 03:53:53,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 106 proven. 49 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:53:55,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:55,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444016053] [2022-11-03 03:53:55,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444016053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:55,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018682288] [2022-11-03 03:53:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:55,953 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:55,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:55,955 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:55,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 03:53:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:53:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 03:53:57,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 106 proven. 49 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:53:59,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2018682288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483899710] [2022-11-03 03:53:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:59,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:59,614 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:59,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-03 03:53:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:53:59,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 123 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 03:54:01,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:54:03,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483899710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:03,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:03,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14, 16, 15, 17] total 30 [2022-11-03 03:54:03,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916089287] [2022-11-03 03:54:03,198 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:03,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:54:03,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:03,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:54:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:54:03,202 INFO L87 Difference]: Start difference. First operand 2022 states and 2667 transitions. Second operand has 30 states, 30 states have (on average 10.3) internal successors, (309), 30 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:06,673 INFO L93 Difference]: Finished difference Result 11210 states and 14785 transitions. [2022-11-03 03:54:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-03 03:54:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 10.3) internal successors, (309), 30 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-03 03:54:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:06,682 INFO L225 Difference]: With dead ends: 11210 [2022-11-03 03:54:06,683 INFO L226 Difference]: Without dead ends: 11208 [2022-11-03 03:54:06,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1099 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1444, Invalid=5036, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 03:54:06,686 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 2032 mSDsluCounter, 3862 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2032 SdHoareTripleChecker+Valid, 4050 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:06,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2032 Valid, 4050 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 377 Invalid, 0 Unknown, 801 Unchecked, 0.6s Time] [2022-11-03 03:54:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2022-11-03 03:54:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 2707. [2022-11-03 03:54:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 1.3351810790835181) internal successors, (3613), 2706 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 3613 transitions. [2022-11-03 03:54:06,782 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 3613 transitions. Word has length 188 [2022-11-03 03:54:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:06,783 INFO L495 AbstractCegarLoop]: Abstraction has 2707 states and 3613 transitions. [2022-11-03 03:54:06,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.3) internal successors, (309), 30 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 3613 transitions. [2022-11-03 03:54:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:54:06,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:06,788 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:54:06,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 03:54:07,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-03 03:54:07,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-03 03:54:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:07,403 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1226488023, now seen corresponding path program 1 times [2022-11-03 03:54:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119238187] [2022-11-03 03:54:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:07,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:07,405 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:07,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 03:54:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:54:07,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 126 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:54:07,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:54:07,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119238187] [2022-11-03 03:54:07,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119238187] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:07,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:54:07,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 03:54:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772703337] [2022-11-03 03:54:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:54:07,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:54:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:54:07,988 INFO L87 Difference]: Start difference. First operand 2707 states and 3613 transitions. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:08,096 INFO L93 Difference]: Finished difference Result 12116 states and 16170 transitions. [2022-11-03 03:54:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:54:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 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 188 [2022-11-03 03:54:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:08,103 INFO L225 Difference]: With dead ends: 12116 [2022-11-03 03:54:08,103 INFO L226 Difference]: Without dead ends: 9459 [2022-11-03 03:54:08,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:54:08,106 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 234 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:08,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 661 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:54:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9459 states. [2022-11-03 03:54:08,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9459 to 4691. [2022-11-03 03:54:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 1.331130063965885) internal successors, (6243), 4690 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 6243 transitions. [2022-11-03 03:54:08,229 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 6243 transitions. Word has length 188 [2022-11-03 03:54:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:08,229 INFO L495 AbstractCegarLoop]: Abstraction has 4691 states and 6243 transitions. [2022-11-03 03:54:08,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 6243 transitions. [2022-11-03 03:54:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:54:08,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:08,236 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:54:08,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:08,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:54:08,453 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1149587225, now seen corresponding path program 1 times [2022-11-03 03:54:08,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:08,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149183312] [2022-11-03 03:54:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:08,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:08,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:08,455 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:08,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 03:54:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:54:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:09,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:10,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149183312] [2022-11-03 03:54:10,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149183312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1200643905] [2022-11-03 03:54:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:10,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:10,531 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:10,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 03:54:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:11,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:54:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 60 proven. 108 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:11,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 60 proven. 108 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:54:12,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1200643905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:12,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309009611] [2022-11-03 03:54:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:12,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:12,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:12,161 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:12,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 03:54:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 106 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:54:13,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 106 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:54:14,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309009611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:14,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:14,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18, 18, 8, 8] total 46 [2022-11-03 03:54:14,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929126344] [2022-11-03 03:54:14,507 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:14,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 03:54:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:14,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 03:54:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:54:14,511 INFO L87 Difference]: Start difference. First operand 4691 states and 6243 transitions. Second operand has 46 states, 46 states have (on average 12.934782608695652) internal successors, (595), 46 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:36,217 INFO L93 Difference]: Finished difference Result 21238 states and 28228 transitions. [2022-11-03 03:54:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-03 03:54:36,218 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 12.934782608695652) internal successors, (595), 46 states have internal predecessors, (595), 0 states have call successors, (0), 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 188 [2022-11-03 03:54:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:36,233 INFO L225 Difference]: With dead ends: 21238 [2022-11-03 03:54:36,233 INFO L226 Difference]: Without dead ends: 16621 [2022-11-03 03:54:36,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1326 GetRequests, 1078 SyntacticMatches, 4 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19581 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=8819, Invalid=51451, Unknown=0, NotChecked=0, Total=60270 [2022-11-03 03:54:36,243 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 3672 mSDsluCounter, 16300 mSDsCounter, 0 mSdLazyCounter, 3732 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3672 SdHoareTripleChecker+Valid, 17045 SdHoareTripleChecker+Invalid, 8101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 3732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4224 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:36,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3672 Valid, 17045 Invalid, 8101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 3732 Invalid, 0 Unknown, 4224 Unchecked, 3.1s Time] [2022-11-03 03:54:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16621 states. [2022-11-03 03:54:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16621 to 4788. [2022-11-03 03:54:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 1.3294338834343011) internal successors, (6364), 4787 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 6364 transitions. [2022-11-03 03:54:36,371 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 6364 transitions. Word has length 188 [2022-11-03 03:54:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:36,372 INFO L495 AbstractCegarLoop]: Abstraction has 4788 states and 6364 transitions. [2022-11-03 03:54:36,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 12.934782608695652) internal successors, (595), 46 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 6364 transitions. [2022-11-03 03:54:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:54:36,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:36,378 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:54:36,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:36,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-03 03:54:36,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-03 03:54:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:36,996 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1806988005, now seen corresponding path program 1 times [2022-11-03 03:54:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459448630] [2022-11-03 03:54:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:36,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:36,999 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:37,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 03:54:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:54:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 03:54:38,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:39,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:39,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459448630] [2022-11-03 03:54:39,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459448630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:39,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579639976] [2022-11-03 03:54:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:39,415 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:39,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:39,416 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:39,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 03:54:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:54:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 76 proven. 93 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:54:42,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 76 proven. 93 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:54:44,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [579639976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539449854] [2022-11-03 03:54:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:44,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:44,590 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:44,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 03:54:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:54:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 03:54:45,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 100 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:45,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539449854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:45,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:45,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 23, 23, 21, 25] total 84 [2022-11-03 03:54:45,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901431318] [2022-11-03 03:54:45,598 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:45,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-03 03:54:45,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-03 03:54:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=6756, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 03:54:45,600 INFO L87 Difference]: Start difference. First operand 4788 states and 6364 transitions. Second operand has 84 states, 84 states have (on average 6.464285714285714) internal successors, (543), 84 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:58,721 INFO L93 Difference]: Finished difference Result 11720 states and 15503 transitions. [2022-11-03 03:54:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-03 03:54:58,721 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 6.464285714285714) internal successors, (543), 84 states have internal predecessors, (543), 0 states have call successors, (0), 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 188 [2022-11-03 03:54:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:58,725 INFO L225 Difference]: With dead ends: 11720 [2022-11-03 03:54:58,726 INFO L226 Difference]: Without dead ends: 7006 [2022-11-03 03:54:58,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1040 SyntacticMatches, 17 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4255 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=3821, Invalid=18529, Unknown=0, NotChecked=0, Total=22350 [2022-11-03 03:54:58,731 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 4686 mSDsluCounter, 16211 mSDsCounter, 0 mSdLazyCounter, 5306 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4686 SdHoareTripleChecker+Valid, 16591 SdHoareTripleChecker+Invalid, 5811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 5306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:58,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4686 Valid, 16591 Invalid, 5811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 5306 Invalid, 0 Unknown, 221 Unchecked, 4.5s Time] [2022-11-03 03:54:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2022-11-03 03:54:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 5291. [2022-11-03 03:54:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5291 states, 5290 states have (on average 1.3247637051039698) internal successors, (7008), 5290 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5291 states to 5291 states and 7008 transitions. [2022-11-03 03:54:58,818 INFO L78 Accepts]: Start accepts. Automaton has 5291 states and 7008 transitions. Word has length 188 [2022-11-03 03:54:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:58,819 INFO L495 AbstractCegarLoop]: Abstraction has 5291 states and 7008 transitions. [2022-11-03 03:54:58,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 6.464285714285714) internal successors, (543), 84 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5291 states and 7008 transitions. [2022-11-03 03:54:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:54:58,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:58,827 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:54:58,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:59,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:59,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-03 03:54:59,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:59,455 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash 212639209, now seen corresponding path program 2 times [2022-11-03 03:54:59,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262106573] [2022-11-03 03:54:59,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:59,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:59,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:59,457 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:59,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 03:54:59,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:59,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:54:59,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 03:55:00,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 106 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 03:55:03,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262106573] [2022-11-03 03:55:03,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262106573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360013925] [2022-11-03 03:55:03,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:55:03,942 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:55:03,943 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:55:03,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 03:55:04,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:55:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:04,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:55:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 03:55:05,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 106 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 03:55:07,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360013925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:07,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642996944] [2022-11-03 03:55:07,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:55:07,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:07,343 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:07,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 03:55:07,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:55:07,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 03:55:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 123 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:55:08,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 03:55:10,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642996944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:10,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:55:10,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 17, 19, 18, 20] total 36 [2022-11-03 03:55:10,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528872893] [2022-11-03 03:55:10,637 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:55:10,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:55:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:55:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:55:10,638 INFO L87 Difference]: Start difference. First operand 5291 states and 7008 transitions. Second operand has 36 states, 36 states have (on average 8.38888888888889) internal successors, (302), 36 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:13,750 INFO L93 Difference]: Finished difference Result 21547 states and 28294 transitions. [2022-11-03 03:55:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 03:55:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 8.38888888888889) internal successors, (302), 36 states have internal predecessors, (302), 0 states have call successors, (0), 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 188 [2022-11-03 03:55:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:13,764 INFO L225 Difference]: With dead ends: 21547 [2022-11-03 03:55:13,764 INFO L226 Difference]: Without dead ends: 21545 [2022-11-03 03:55:13,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1078 SyntacticMatches, 14 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1173, Invalid=5147, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 03:55:13,769 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 2026 mSDsluCounter, 3652 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2026 SdHoareTripleChecker+Valid, 3857 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 879 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:13,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2026 Valid, 3857 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 378 Invalid, 0 Unknown, 879 Unchecked, 0.4s Time] [2022-11-03 03:55:13,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21545 states. [2022-11-03 03:55:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21545 to 6661. [2022-11-03 03:55:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 1.3312312312312313) internal successors, (8866), 6660 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 8866 transitions. [2022-11-03 03:55:13,962 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 8866 transitions. Word has length 188 [2022-11-03 03:55:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:13,962 INFO L495 AbstractCegarLoop]: Abstraction has 6661 states and 8866 transitions. [2022-11-03 03:55:13,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.38888888888889) internal successors, (302), 36 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 8866 transitions. [2022-11-03 03:55:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:55:13,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:13,969 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:55:13,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:14,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 03:55:14,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-11-03 03:55:14,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:14,574 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash 353187819, now seen corresponding path program 3 times [2022-11-03 03:55:14,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:14,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206292363] [2022-11-03 03:55:14,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:55:14,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:14,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:14,577 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:14,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 03:55:14,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:55:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:55:14,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 03:55:14,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:55:14,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:14,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206292363] [2022-11-03 03:55:14,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206292363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:55:14,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:55:14,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:55:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934547816] [2022-11-03 03:55:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:55:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:55:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:55:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:55:14,835 INFO L87 Difference]: Start difference. First operand 6661 states and 8866 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:14,969 INFO L93 Difference]: Finished difference Result 29370 states and 38843 transitions. [2022-11-03 03:55:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:55:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 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 188 [2022-11-03 03:55:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:15,028 INFO L225 Difference]: With dead ends: 29370 [2022-11-03 03:55:15,028 INFO L226 Difference]: Without dead ends: 22783 [2022-11-03 03:55:15,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:55:15,032 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 328 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:15,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 502 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:55:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22783 states. [2022-11-03 03:55:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22783 to 10521. [2022-11-03 03:55:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10521 states, 10520 states have (on average 1.3167300380228137) internal successors, (13852), 10520 states have internal predecessors, (13852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10521 states to 10521 states and 13852 transitions. [2022-11-03 03:55:15,165 INFO L78 Accepts]: Start accepts. Automaton has 10521 states and 13852 transitions. Word has length 188 [2022-11-03 03:55:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:15,165 INFO L495 AbstractCegarLoop]: Abstraction has 10521 states and 13852 transitions. [2022-11-03 03:55:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10521 states and 13852 transitions. [2022-11-03 03:55:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:55:15,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:15,174 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:55:15,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:15,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:55:15,387 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1614105069, now seen corresponding path program 4 times [2022-11-03 03:55:15,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:15,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392132702] [2022-11-03 03:55:15,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:55:15,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:15,389 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:15,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 03:55:15,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:55:15,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:55:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 32 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:55:15,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 03:55:16,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:16,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392132702] [2022-11-03 03:55:16,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392132702] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:55:16,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:55:16,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 03:55:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370244939] [2022-11-03 03:55:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:55:16,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:55:16,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:55:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:55:16,049 INFO L87 Difference]: Start difference. First operand 10521 states and 13852 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:16,180 INFO L93 Difference]: Finished difference Result 35614 states and 46597 transitions. [2022-11-03 03:55:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:55:16,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 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 188 [2022-11-03 03:55:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:16,199 INFO L225 Difference]: With dead ends: 35614 [2022-11-03 03:55:16,200 INFO L226 Difference]: Without dead ends: 25167 [2022-11-03 03:55:16,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:55:16,208 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 355 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:16,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 423 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:55:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25167 states. [2022-11-03 03:55:16,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25167 to 12451. [2022-11-03 03:55:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 1.3022489959839358) internal successors, (16213), 12450 states have internal predecessors, (16213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 16213 transitions. [2022-11-03 03:55:16,422 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 16213 transitions. Word has length 188 [2022-11-03 03:55:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:16,422 INFO L495 AbstractCegarLoop]: Abstraction has 12451 states and 16213 transitions. [2022-11-03 03:55:16,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 16213 transitions. [2022-11-03 03:55:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:55:16,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:16,433 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:55:16,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:16,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:55:16,648 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash 25757167, now seen corresponding path program 5 times [2022-11-03 03:55:16,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:16,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328690348] [2022-11-03 03:55:16,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 03:55:16,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:16,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:16,650 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:16,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 03:55:16,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 03:55:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:55:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:55:18,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:55:21,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328690348] [2022-11-03 03:55:21,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328690348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:21,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1615851070] [2022-11-03 03:55:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 03:55:21,899 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:21,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:55:21,900 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:55:21,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 03:55:22,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 03:55:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 03:55:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 03:55:23,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 03:55:25,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1615851070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034314645] [2022-11-03 03:55:25,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 03:55:25,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:25,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:25,782 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:25,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 03:55:26,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 03:55:26,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:26,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 03:55:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 03:55:29,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 03:55:35,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034314645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:35,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:55:35,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22, 22, 23, 24] total 81 [2022-11-03 03:55:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556883432] [2022-11-03 03:55:35,211 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:55:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-03 03:55:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-03 03:55:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=6193, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 03:55:35,212 INFO L87 Difference]: Start difference. First operand 12451 states and 16213 transitions. Second operand has 81 states, 81 states have (on average 7.148148148148148) internal successors, (579), 81 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:53,275 INFO L93 Difference]: Finished difference Result 61442 states and 79085 transitions. [2022-11-03 03:55:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-03 03:55:53,276 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 7.148148148148148) internal successors, (579), 81 states have internal predecessors, (579), 0 states have call successors, (0), 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 188 [2022-11-03 03:55:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:53,314 INFO L225 Difference]: With dead ends: 61442 [2022-11-03 03:55:53,314 INFO L226 Difference]: Without dead ends: 48558 [2022-11-03 03:55:53,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1306 GetRequests, 1077 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=6566, Invalid=36490, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 03:55:53,329 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 7060 mSDsluCounter, 9002 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7060 SdHoareTripleChecker+Valid, 9306 SdHoareTripleChecker+Invalid, 3963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2608 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:53,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7060 Valid, 9306 Invalid, 3963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 1042 Invalid, 0 Unknown, 2608 Unchecked, 1.2s Time] [2022-11-03 03:55:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48558 states. [2022-11-03 03:55:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48558 to 13233. [2022-11-03 03:55:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13233 states, 13232 states have (on average 1.3025241837968562) internal successors, (17235), 13232 states have internal predecessors, (17235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13233 states to 13233 states and 17235 transitions. [2022-11-03 03:55:53,565 INFO L78 Accepts]: Start accepts. Automaton has 13233 states and 17235 transitions. Word has length 188 [2022-11-03 03:55:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:53,566 INFO L495 AbstractCegarLoop]: Abstraction has 13233 states and 17235 transitions. [2022-11-03 03:55:53,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 7.148148148148148) internal successors, (579), 81 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 13233 states and 17235 transitions. [2022-11-03 03:55:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:55:53,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:53,578 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:55:53,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:53,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 03:55:54,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-03 03:55:54,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:54,183 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:54,183 INFO L85 PathProgramCache]: Analyzing trace with hash -44782349, now seen corresponding path program 6 times [2022-11-03 03:55:54,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:54,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412679328] [2022-11-03 03:55:54,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 03:55:54,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:54,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:54,185 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:54,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 03:55:54,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 03:55:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:54,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:55:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-03 03:55:54,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:55:54,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:54,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412679328] [2022-11-03 03:55:54,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412679328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:55:54,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:55:54,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:55:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138146234] [2022-11-03 03:55:54,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:55:54,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:55:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:54,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:55:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:55:54,467 INFO L87 Difference]: Start difference. First operand 13233 states and 17235 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:54,659 INFO L93 Difference]: Finished difference Result 32702 states and 42506 transitions. [2022-11-03 03:55:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:55:54,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-03 03:55:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:54,670 INFO L225 Difference]: With dead ends: 32702 [2022-11-03 03:55:54,671 INFO L226 Difference]: Without dead ends: 19535 [2022-11-03 03:55:54,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:55:54,677 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 248 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:54,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 436 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:55:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19535 states. [2022-11-03 03:55:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19535 to 12007. [2022-11-03 03:55:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12007 states, 12006 states have (on average 1.2721972347159753) internal successors, (15274), 12006 states have internal predecessors, (15274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12007 states to 12007 states and 15274 transitions. [2022-11-03 03:55:54,813 INFO L78 Accepts]: Start accepts. Automaton has 12007 states and 15274 transitions. Word has length 188 [2022-11-03 03:55:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:54,814 INFO L495 AbstractCegarLoop]: Abstraction has 12007 states and 15274 transitions. [2022-11-03 03:55:54,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 12007 states and 15274 transitions. [2022-11-03 03:55:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:55:54,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:54,823 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:55:54,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:55,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:55:55,033 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash -818248335, now seen corresponding path program 1 times [2022-11-03 03:55:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:55,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102328724] [2022-11-03 03:55:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:55,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:55,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:55,036 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:55,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 03:55:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:55:55,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:55:56,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:55:58,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102328724] [2022-11-03 03:55:58,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102328724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326200026] [2022-11-03 03:55:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:55:58,189 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:55:58,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 03:55:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:58,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:55:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:55:59,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:56:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326200026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526673009] [2022-11-03 03:56:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:00,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:00,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:00,382 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-03 03:56:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:00,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:56:00,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 68 proven. 54 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:01,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 68 proven. 54 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:01,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526673009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:01,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:01,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 7, 7] total 46 [2022-11-03 03:56:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524551586] [2022-11-03 03:56:01,558 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 03:56:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:01,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 03:56:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:56:01,560 INFO L87 Difference]: Start difference. First operand 12007 states and 15274 transitions. Second operand has 46 states, 46 states have (on average 10.5) internal successors, (483), 46 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:03,733 INFO L93 Difference]: Finished difference Result 28367 states and 36051 transitions. [2022-11-03 03:56:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 03:56:03,734 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 10.5) internal successors, (483), 46 states have internal predecessors, (483), 0 states have call successors, (0), 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 188 [2022-11-03 03:56:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:03,746 INFO L225 Difference]: With dead ends: 28367 [2022-11-03 03:56:03,746 INFO L226 Difference]: Without dead ends: 17367 [2022-11-03 03:56:03,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1078 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=642, Invalid=4328, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 03:56:03,756 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 635 mSDsluCounter, 6580 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 6838 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:03,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 6838 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 419 Invalid, 0 Unknown, 616 Unchecked, 0.5s Time] [2022-11-03 03:56:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17367 states. [2022-11-03 03:56:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17367 to 16802. [2022-11-03 03:56:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16802 states, 16801 states have (on average 1.2627224569966073) internal successors, (21215), 16801 states have internal predecessors, (21215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16802 states to 16802 states and 21215 transitions. [2022-11-03 03:56:03,974 INFO L78 Accepts]: Start accepts. Automaton has 16802 states and 21215 transitions. Word has length 188 [2022-11-03 03:56:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:03,975 INFO L495 AbstractCegarLoop]: Abstraction has 16802 states and 21215 transitions. [2022-11-03 03:56:03,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 10.5) internal successors, (483), 46 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 16802 states and 21215 transitions. [2022-11-03 03:56:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:56:03,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:03,984 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:04,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-03 03:56:04,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 03:56:04,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:04,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:04,585 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:04,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1154001131, now seen corresponding path program 1 times [2022-11-03 03:56:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:04,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576525910] [2022-11-03 03:56:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:04,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:04,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:04,588 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:04,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 03:56:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:56:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:05,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:06,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:06,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576525910] [2022-11-03 03:56:06,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576525910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:06,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367946293] [2022-11-03 03:56:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:06,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:06,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:06,070 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 03:56:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 03:56:06,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:06,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367946293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:06,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:56:06,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 17] total 33 [2022-11-03 03:56:06,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821838353] [2022-11-03 03:56:06,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:56:06,635 INFO L87 Difference]: Start difference. First operand 16802 states and 21215 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:06,935 INFO L93 Difference]: Finished difference Result 48334 states and 60648 transitions. [2022-11-03 03:56:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 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 188 [2022-11-03 03:56:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:06,956 INFO L225 Difference]: With dead ends: 48334 [2022-11-03 03:56:06,956 INFO L226 Difference]: Without dead ends: 31590 [2022-11-03 03:56:06,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:56:06,965 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 222 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:06,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 576 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31590 states. [2022-11-03 03:56:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31590 to 16802. [2022-11-03 03:56:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16802 states, 16801 states have (on average 1.243080769001845) internal successors, (20885), 16801 states have internal predecessors, (20885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16802 states to 16802 states and 20885 transitions. [2022-11-03 03:56:07,261 INFO L78 Accepts]: Start accepts. Automaton has 16802 states and 20885 transitions. Word has length 188 [2022-11-03 03:56:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:07,261 INFO L495 AbstractCegarLoop]: Abstraction has 16802 states and 20885 transitions. [2022-11-03 03:56:07,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 16802 states and 20885 transitions. [2022-11-03 03:56:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:56:07,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:07,268 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:07,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 03:56:07,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-03 03:56:07,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:07,668 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -769226903, now seen corresponding path program 1 times [2022-11-03 03:56:07,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706863009] [2022-11-03 03:56:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:07,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:07,671 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:07,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 03:56:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:56:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:08,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:09,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706863009] [2022-11-03 03:56:09,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706863009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888291736] [2022-11-03 03:56:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:09,187 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:09,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:09,188 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:09,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 03:56:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:09,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:56:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:10,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:10,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [888291736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:10,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955470060] [2022-11-03 03:56:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:10,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:10,538 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:10,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-03 03:56:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:10,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:56:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:11,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:11,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955470060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:11,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 30 [2022-11-03 03:56:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711092000] [2022-11-03 03:56:11,610 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:11,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:56:11,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:56:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:56:11,612 INFO L87 Difference]: Start difference. First operand 16802 states and 20885 transitions. Second operand has 30 states, 30 states have (on average 7.766666666666667) internal successors, (233), 30 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:16,714 INFO L93 Difference]: Finished difference Result 115484 states and 143178 transitions. [2022-11-03 03:56:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 03:56:16,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.766666666666667) internal successors, (233), 30 states have internal predecessors, (233), 0 states have call successors, (0), 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 188 [2022-11-03 03:56:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:16,787 INFO L225 Difference]: With dead ends: 115484 [2022-11-03 03:56:16,787 INFO L226 Difference]: Without dead ends: 99689 [2022-11-03 03:56:16,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 1094 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5008 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3054, Invalid=13458, Unknown=0, NotChecked=0, Total=16512 [2022-11-03 03:56:16,816 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 2877 mSDsluCounter, 5576 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2877 SdHoareTripleChecker+Valid, 5891 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:16,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2877 Valid, 5891 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 03:56:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99689 states. [2022-11-03 03:56:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99689 to 16882. [2022-11-03 03:56:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16882 states, 16881 states have (on average 1.2432320360168236) internal successors, (20987), 16881 states have internal predecessors, (20987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16882 states to 16882 states and 20987 transitions. [2022-11-03 03:56:17,389 INFO L78 Accepts]: Start accepts. Automaton has 16882 states and 20987 transitions. Word has length 188 [2022-11-03 03:56:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:17,389 INFO L495 AbstractCegarLoop]: Abstraction has 16882 states and 20987 transitions. [2022-11-03 03:56:17,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.766666666666667) internal successors, (233), 30 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 16882 states and 20987 transitions. [2022-11-03 03:56:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:56:17,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:17,395 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:56:17,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-03 03:56:17,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2022-11-03 03:56:17,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 03:56:17,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:17,996 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1987331825, now seen corresponding path program 1 times [2022-11-03 03:56:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:17,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858464544] [2022-11-03 03:56:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:17,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:17,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:17,999 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:18,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 03:56:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:56:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:18,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:18,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:18,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858464544] [2022-11-03 03:56:18,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858464544] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:18,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:56:18,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2022-11-03 03:56:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608166986] [2022-11-03 03:56:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:18,806 INFO L87 Difference]: Start difference. First operand 16882 states and 20987 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:19,097 INFO L93 Difference]: Finished difference Result 65687 states and 81577 transitions. [2022-11-03 03:56:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-03 03:56:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:19,128 INFO L225 Difference]: With dead ends: 65687 [2022-11-03 03:56:19,129 INFO L226 Difference]: Without dead ends: 48817 [2022-11-03 03:56:19,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:56:19,145 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 253 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:19,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 510 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48817 states. [2022-11-03 03:56:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48817 to 17054. [2022-11-03 03:56:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17054 states, 17053 states have (on average 1.242010203483258) internal successors, (21180), 17053 states have internal predecessors, (21180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17054 states to 17054 states and 21180 transitions. [2022-11-03 03:56:19,416 INFO L78 Accepts]: Start accepts. Automaton has 17054 states and 21180 transitions. Word has length 188 [2022-11-03 03:56:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:19,416 INFO L495 AbstractCegarLoop]: Abstraction has 17054 states and 21180 transitions. [2022-11-03 03:56:19,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 17054 states and 21180 transitions. [2022-11-03 03:56:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:56:19,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:19,626 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:19,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:19,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,826 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash -920850061, now seen corresponding path program 1 times [2022-11-03 03:56:19,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:19,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179292034] [2022-11-03 03:56:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:19,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:19,828 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:19,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 03:56:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:20,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:56:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 96 proven. 26 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:20,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 96 proven. 26 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:21,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179292034] [2022-11-03 03:56:21,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179292034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1208909718] [2022-11-03 03:56:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:21,596 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:21,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 03:56:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:22,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:22,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:22,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1208909718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:22,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:56:22,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 12 [2022-11-03 03:56:22,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103741896] [2022-11-03 03:56:22,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:22,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:22,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:22,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:22,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:56:22,112 INFO L87 Difference]: Start difference. First operand 17054 states and 21180 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:22,411 INFO L93 Difference]: Finished difference Result 72207 states and 89010 transitions. [2022-11-03 03:56:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:56:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-03 03:56:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:22,452 INFO L225 Difference]: With dead ends: 72207 [2022-11-03 03:56:22,452 INFO L226 Difference]: Without dead ends: 55209 [2022-11-03 03:56:22,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:56:22,466 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 241 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:22,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 622 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55209 states. [2022-11-03 03:56:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55209 to 24260. [2022-11-03 03:56:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24260 states, 24259 states have (on average 1.2312543798177995) internal successors, (29869), 24259 states have internal predecessors, (29869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24260 states to 24260 states and 29869 transitions. [2022-11-03 03:56:22,912 INFO L78 Accepts]: Start accepts. Automaton has 24260 states and 29869 transitions. Word has length 188 [2022-11-03 03:56:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:22,912 INFO L495 AbstractCegarLoop]: Abstraction has 24260 states and 29869 transitions. [2022-11-03 03:56:22,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 24260 states and 29869 transitions. [2022-11-03 03:56:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:56:22,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:22,919 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:22,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:23,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 03:56:23,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:23,321 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash 465353333, now seen corresponding path program 1 times [2022-11-03 03:56:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:23,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828669424] [2022-11-03 03:56:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:23,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:23,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:23,323 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:23,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 03:56:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:56:23,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 96 proven. 26 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:24,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 96 proven. 26 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:56:25,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:25,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828669424] [2022-11-03 03:56:25,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828669424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:25,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1869126189] [2022-11-03 03:56:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:25,081 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:25,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:25,082 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:25,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 03:56:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:56:25,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:56:26,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:56:30,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1869126189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:30,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989881243] [2022-11-03 03:56:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:30,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:30,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:30,048 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:30,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 03:56:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:56:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 96 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:56:31,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:56:32,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989881243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:32,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:32,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 16, 16, 9, 8] total 42 [2022-11-03 03:56:32,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058736227] [2022-11-03 03:56:32,133 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 03:56:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 03:56:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:56:32,135 INFO L87 Difference]: Start difference. First operand 24260 states and 29869 transitions. Second operand has 42 states, 42 states have (on average 11.380952380952381) internal successors, (478), 42 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:53,856 INFO L93 Difference]: Finished difference Result 217783 states and 261291 transitions. [2022-11-03 03:56:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-11-03 03:56:53,856 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 11.380952380952381) internal successors, (478), 42 states have internal predecessors, (478), 0 states have call successors, (0), 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 188 [2022-11-03 03:56:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:53,999 INFO L225 Difference]: With dead ends: 217783 [2022-11-03 03:56:53,999 INFO L226 Difference]: Without dead ends: 193541 [2022-11-03 03:56:54,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1310 GetRequests, 1092 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14472 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=8537, Invalid=39643, Unknown=0, NotChecked=0, Total=48180 [2022-11-03 03:56:54,023 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 2042 mSDsluCounter, 19121 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 20056 SdHoareTripleChecker+Invalid, 4673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1625 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:54,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 20056 Invalid, 4673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3013 Invalid, 0 Unknown, 1625 Unchecked, 3.0s Time] [2022-11-03 03:56:54,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193541 states. [2022-11-03 03:56:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193541 to 24394. [2022-11-03 03:56:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24394 states, 24393 states have (on average 1.229820030336572) internal successors, (29999), 24393 states have internal predecessors, (29999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24394 states to 24394 states and 29999 transitions. [2022-11-03 03:56:55,113 INFO L78 Accepts]: Start accepts. Automaton has 24394 states and 29999 transitions. Word has length 188 [2022-11-03 03:56:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:55,114 INFO L495 AbstractCegarLoop]: Abstraction has 24394 states and 29999 transitions. [2022-11-03 03:56:55,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 11.380952380952381) internal successors, (478), 42 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 24394 states and 29999 transitions. [2022-11-03 03:56:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:56:55,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:55,126 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 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] [2022-11-03 03:56:55,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:55,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 03:56:55,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 03:56:55,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:55,743 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:55,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1473393419, now seen corresponding path program 1 times [2022-11-03 03:56:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:55,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115610174] [2022-11-03 03:56:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:55,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:55,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:55,746 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:55,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 03:56:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:56:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 52 proven. 88 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:56,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 52 proven. 88 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:56:57,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115610174] [2022-11-03 03:56:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115610174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [727547993] [2022-11-03 03:56:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:57,468 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:57,475 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:57,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 03:56:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 03:56:58,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:58,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [727547993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:58,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:56:58,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 17] total 31 [2022-11-03 03:56:58,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837065134] [2022-11-03 03:56:58,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:58,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:58,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:56:58,076 INFO L87 Difference]: Start difference. First operand 24394 states and 29999 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:58,400 INFO L93 Difference]: Finished difference Result 66566 states and 82066 transitions. [2022-11-03 03:56:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 188 [2022-11-03 03:56:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:58,428 INFO L225 Difference]: With dead ends: 66566 [2022-11-03 03:56:58,428 INFO L226 Difference]: Without dead ends: 42226 [2022-11-03 03:56:58,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:56:58,443 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 410 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:58,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 302 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42226 states. [2022-11-03 03:56:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42226 to 24394. [2022-11-03 03:56:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24394 states, 24393 states have (on average 1.214897716558029) internal successors, (29635), 24393 states have internal predecessors, (29635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24394 states to 24394 states and 29635 transitions. [2022-11-03 03:56:58,852 INFO L78 Accepts]: Start accepts. Automaton has 24394 states and 29635 transitions. Word has length 188 [2022-11-03 03:56:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:58,852 INFO L495 AbstractCegarLoop]: Abstraction has 24394 states and 29635 transitions. [2022-11-03 03:56:58,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 24394 states and 29635 transitions. [2022-11-03 03:56:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:56:58,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:58,864 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:58,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-03 03:56:59,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:59,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:59,284 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1501194329, now seen corresponding path program 2 times [2022-11-03 03:56:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:59,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027406210] [2022-11-03 03:56:59,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:56:59,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:59,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:59,286 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:59,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 03:56:59,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:56:59,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:56:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 126 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:56:59,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:57:00,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:00,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027406210] [2022-11-03 03:57:00,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027406210] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:00,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:57:00,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-03 03:57:00,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12681897] [2022-11-03 03:57:00,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:00,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:00,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:57:00,048 INFO L87 Difference]: Start difference. First operand 24394 states and 29635 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:00,300 INFO L93 Difference]: Finished difference Result 66868 states and 81072 transitions. [2022-11-03 03:57:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:57:00,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 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 188 [2022-11-03 03:57:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:00,329 INFO L225 Difference]: With dead ends: 66868 [2022-11-03 03:57:00,329 INFO L226 Difference]: Without dead ends: 42532 [2022-11-03 03:57:00,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:57:00,343 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 202 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:00,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 468 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:57:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42532 states. [2022-11-03 03:57:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42532 to 24394. [2022-11-03 03:57:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24394 states, 24393 states have (on average 1.2142417906776535) internal successors, (29619), 24393 states have internal predecessors, (29619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24394 states to 24394 states and 29619 transitions. [2022-11-03 03:57:00,742 INFO L78 Accepts]: Start accepts. Automaton has 24394 states and 29619 transitions. Word has length 188 [2022-11-03 03:57:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:00,742 INFO L495 AbstractCegarLoop]: Abstraction has 24394 states and 29619 transitions. [2022-11-03 03:57:00,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 24394 states and 29619 transitions. [2022-11-03 03:57:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:57:00,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:00,752 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:00,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 03:57:00,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:00,952 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1139230887, now seen corresponding path program 3 times [2022-11-03 03:57:00,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:00,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127195573] [2022-11-03 03:57:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:57:00,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:00,955 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:00,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 03:57:01,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:57:01,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:57:01,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:57:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 156 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:57:01,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:57:01,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127195573] [2022-11-03 03:57:01,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127195573] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:01,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:57:01,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 03:57:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787154483] [2022-11-03 03:57:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:01,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:57:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:57:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:57:01,656 INFO L87 Difference]: Start difference. First operand 24394 states and 29619 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 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) [2022-11-03 03:57:02,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:02,188 INFO L93 Difference]: Finished difference Result 82614 states and 99952 transitions. [2022-11-03 03:57:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:57:02,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 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 188 [2022-11-03 03:57:02,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:02,229 INFO L225 Difference]: With dead ends: 82614 [2022-11-03 03:57:02,229 INFO L226 Difference]: Without dead ends: 58278 [2022-11-03 03:57:02,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:57:02,243 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 668 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:02,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 501 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58278 states. [2022-11-03 03:57:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58278 to 24730. [2022-11-03 03:57:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24730 states, 24729 states have (on average 1.212624853410975) internal successors, (29987), 24729 states have internal predecessors, (29987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24730 states to 24730 states and 29987 transitions. [2022-11-03 03:57:02,811 INFO L78 Accepts]: Start accepts. Automaton has 24730 states and 29987 transitions. Word has length 188 [2022-11-03 03:57:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:02,811 INFO L495 AbstractCegarLoop]: Abstraction has 24730 states and 29987 transitions. [2022-11-03 03:57:02,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 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) [2022-11-03 03:57:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 24730 states and 29987 transitions. [2022-11-03 03:57:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:57:02,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:02,821 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:02,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:03,036 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1656449749, now seen corresponding path program 1 times [2022-11-03 03:57:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:03,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350516129] [2022-11-03 03:57:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:03,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:03,038 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:03,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 03:57:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:03,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:57:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 126 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:57:03,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:57:03,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350516129] [2022-11-03 03:57:03,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350516129] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:03,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:57:03,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 03:57:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518182855] [2022-11-03 03:57:03,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:03,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:57:03,601 INFO L87 Difference]: Start difference. First operand 24730 states and 29987 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 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) [2022-11-03 03:57:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:03,983 INFO L93 Difference]: Finished difference Result 73785 states and 89446 transitions. [2022-11-03 03:57:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:57:03,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 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 188 [2022-11-03 03:57:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:04,195 INFO L225 Difference]: With dead ends: 73785 [2022-11-03 03:57:04,195 INFO L226 Difference]: Without dead ends: 49055 [2022-11-03 03:57:04,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:57:04,201 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 240 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:04,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 574 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:57:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49055 states. [2022-11-03 03:57:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49055 to 24730. [2022-11-03 03:57:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24730 states, 24729 states have (on average 1.2102794290104735) internal successors, (29929), 24729 states have internal predecessors, (29929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24730 states to 24730 states and 29929 transitions. [2022-11-03 03:57:04,616 INFO L78 Accepts]: Start accepts. Automaton has 24730 states and 29929 transitions. Word has length 188 [2022-11-03 03:57:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:04,616 INFO L495 AbstractCegarLoop]: Abstraction has 24730 states and 29929 transitions. [2022-11-03 03:57:04,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 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) [2022-11-03 03:57:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 24730 states and 29929 transitions. [2022-11-03 03:57:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:57:04,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:04,623 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:04,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:04,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:04,823 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1448403495, now seen corresponding path program 4 times [2022-11-03 03:57:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:04,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091092039] [2022-11-03 03:57:04,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:57:04,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:04,827 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:04,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 03:57:05,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:57:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:57:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:57:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:57:05,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:57:05,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:05,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091092039] [2022-11-03 03:57:05,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091092039] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:05,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:57:05,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 03:57:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720101440] [2022-11-03 03:57:05,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:05,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:05,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:57:05,500 INFO L87 Difference]: Start difference. First operand 24730 states and 29929 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:05,886 INFO L93 Difference]: Finished difference Result 73751 states and 89234 transitions. [2022-11-03 03:57:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:57:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-03 03:57:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:05,921 INFO L225 Difference]: With dead ends: 73751 [2022-11-03 03:57:05,921 INFO L226 Difference]: Without dead ends: 49079 [2022-11-03 03:57:05,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:57:05,935 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 354 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:05,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 424 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:57:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2022-11-03 03:57:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 24730. [2022-11-03 03:57:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24730 states, 24729 states have (on average 1.2063973472441263) internal successors, (29833), 24729 states have internal predecessors, (29833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24730 states to 24730 states and 29833 transitions. [2022-11-03 03:57:06,401 INFO L78 Accepts]: Start accepts. Automaton has 24730 states and 29833 transitions. Word has length 188 [2022-11-03 03:57:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:06,402 INFO L495 AbstractCegarLoop]: Abstraction has 24730 states and 29833 transitions. [2022-11-03 03:57:06,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 24730 states and 29833 transitions. [2022-11-03 03:57:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 03:57:06,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:06,418 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:06,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:06,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:06,619 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 466154491, now seen corresponding path program 1 times [2022-11-03 03:57:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:06,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188029070] [2022-11-03 03:57:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:06,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:06,621 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:06,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 03:57:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:57:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 220 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:57:08,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 220 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:57:10,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:10,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188029070] [2022-11-03 03:57:10,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188029070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:10,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97350254] [2022-11-03 03:57:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:10,644 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:10,645 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:10,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 03:57:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:11,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:57:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 33 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 03:57:12,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 188 proven. 18 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 03:57:14,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [97350254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:14,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193195421] [2022-11-03 03:57:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:14,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:14,096 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:14,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-03 03:57:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:57:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 285 proven. 18 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 03:57:14,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 302 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 03:57:15,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193195421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:15,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:15,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15, 15, 13, 12] total 57 [2022-11-03 03:57:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45159747] [2022-11-03 03:57:15,070 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:15,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-03 03:57:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-03 03:57:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 03:57:15,071 INFO L87 Difference]: Start difference. First operand 24730 states and 29833 transitions. Second operand has 57 states, 57 states have (on average 11.192982456140351) internal successors, (638), 57 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:13,438 INFO L93 Difference]: Finished difference Result 296929 states and 359132 transitions. [2022-11-03 03:58:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 553 states. [2022-11-03 03:58:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 11.192982456140351) internal successors, (638), 57 states have internal predecessors, (638), 0 states have call successors, (0), 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 249 [2022-11-03 03:58:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:13,781 INFO L225 Difference]: With dead ends: 296929 [2022-11-03 03:58:13,781 INFO L226 Difference]: Without dead ends: 272257 [2022-11-03 03:58:13,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2268 GetRequests, 1656 SyntacticMatches, 12 SemanticMatches, 600 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157815 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=38542, Invalid=323260, Unknown=0, NotChecked=0, Total=361802 [2022-11-03 03:58:13,846 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 12844 mSDsluCounter, 14792 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12844 SdHoareTripleChecker+Valid, 15162 SdHoareTripleChecker+Invalid, 11657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6770 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:13,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12844 Valid, 15162 Invalid, 11657 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [876 Valid, 4011 Invalid, 0 Unknown, 6770 Unchecked, 4.2s Time] [2022-11-03 03:58:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272257 states. [2022-11-03 03:58:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272257 to 55188. [2022-11-03 03:58:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55188 states, 55187 states have (on average 1.205501295594977) internal successors, (66528), 55187 states have internal predecessors, (66528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55188 states to 55188 states and 66528 transitions. [2022-11-03 03:58:15,911 INFO L78 Accepts]: Start accepts. Automaton has 55188 states and 66528 transitions. Word has length 249 [2022-11-03 03:58:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:15,911 INFO L495 AbstractCegarLoop]: Abstraction has 55188 states and 66528 transitions. [2022-11-03 03:58:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 11.192982456140351) internal successors, (638), 57 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 55188 states and 66528 transitions. [2022-11-03 03:58:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 03:58:15,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:15,942 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 03:58:15,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2022-11-03 03:58:16,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:16,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-11-03 03:58:16,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:16,543 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash -392894989, now seen corresponding path program 1 times [2022-11-03 03:58:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:16,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273592559] [2022-11-03 03:58:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:16,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:16,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:16,545 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:16,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 03:58:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:58:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 149 proven. 202 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:58:18,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 149 proven. 202 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:58:19,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:19,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273592559] [2022-11-03 03:58:19,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273592559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:19,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [131359245] [2022-11-03 03:58:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:19,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:19,689 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:19,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-03 03:58:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:20,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:58:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 201 proven. 149 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:58:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 201 proven. 149 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:58:24,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [131359245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:24,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776719766] [2022-11-03 03:58:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:24,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:24,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:24,195 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:24,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-03 03:58:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:24,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:58:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 149 proven. 202 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:58:25,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 149 proven. 202 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:58:25,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776719766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:25,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:58:25,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20, 20, 21, 21] total 74 [2022-11-03 03:58:25,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909593318] [2022-11-03 03:58:25,754 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:25,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-03 03:58:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-03 03:58:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=5170, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 03:58:25,756 INFO L87 Difference]: Start difference. First operand 55188 states and 66528 transitions. Second operand has 74 states, 74 states have (on average 10.64864864864865) internal successors, (788), 74 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:48,995 INFO L93 Difference]: Finished difference Result 155029 states and 189436 transitions. [2022-11-03 03:58:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-03 03:58:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 10.64864864864865) internal successors, (788), 74 states have internal predecessors, (788), 0 states have call successors, (0), 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 249 [2022-11-03 03:58:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:49,074 INFO L225 Difference]: With dead ends: 155029 [2022-11-03 03:58:49,074 INFO L226 Difference]: Without dead ends: 101330 [2022-11-03 03:58:49,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1662 GetRequests, 1416 SyntacticMatches, 39 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13268 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=5796, Invalid=37676, Unknown=0, NotChecked=0, Total=43472 [2022-11-03 03:58:49,098 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 9553 mSDsluCounter, 11431 mSDsCounter, 0 mSdLazyCounter, 3554 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9553 SdHoareTripleChecker+Valid, 11707 SdHoareTripleChecker+Invalid, 5924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 3554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1777 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:49,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9553 Valid, 11707 Invalid, 5924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 3554 Invalid, 0 Unknown, 1777 Unchecked, 3.4s Time] [2022-11-03 03:58:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101330 states. [2022-11-03 03:58:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101330 to 59992. [2022-11-03 03:58:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59992 states, 59991 states have (on average 1.2059808971345702) internal successors, (72348), 59991 states have internal predecessors, (72348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59992 states to 59992 states and 72348 transitions. [2022-11-03 03:58:50,523 INFO L78 Accepts]: Start accepts. Automaton has 59992 states and 72348 transitions. Word has length 249 [2022-11-03 03:58:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:50,523 INFO L495 AbstractCegarLoop]: Abstraction has 59992 states and 72348 transitions. [2022-11-03 03:58:50,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 10.64864864864865) internal successors, (788), 74 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 59992 states and 72348 transitions. [2022-11-03 03:58:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 03:58:50,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:50,567 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:58:50,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:50,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:50,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:51,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:51,168 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1292246143, now seen corresponding path program 1 times [2022-11-03 03:58:51,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:51,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625446124] [2022-11-03 03:58:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:51,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:51,170 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:51,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 03:58:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:58:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 241 proven. 35 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-03 03:58:52,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 03:58:52,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:52,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625446124] [2022-11-03 03:58:52,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625446124] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:52,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:52,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-03 03:58:52,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68857441] [2022-11-03 03:58:52,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:52,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:58:52,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:58:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:58:52,189 INFO L87 Difference]: Start difference. First operand 59992 states and 72348 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:53,261 INFO L93 Difference]: Finished difference Result 175295 states and 211429 transitions. [2022-11-03 03:58:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:58:53,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-11-03 03:58:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:53,343 INFO L225 Difference]: With dead ends: 175295 [2022-11-03 03:58:53,343 INFO L226 Difference]: Without dead ends: 115361 [2022-11-03 03:58:53,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:58:53,367 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 369 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:53,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 401 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:58:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115361 states. [2022-11-03 03:58:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115361 to 59912. [2022-11-03 03:58:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59912 states, 59911 states have (on average 1.2042529752466158) internal successors, (72148), 59911 states have internal predecessors, (72148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59912 states to 59912 states and 72148 transitions. [2022-11-03 03:58:54,831 INFO L78 Accepts]: Start accepts. Automaton has 59912 states and 72148 transitions. Word has length 249 [2022-11-03 03:58:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:54,831 INFO L495 AbstractCegarLoop]: Abstraction has 59912 states and 72148 transitions. [2022-11-03 03:58:54,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 59912 states and 72148 transitions. [2022-11-03 03:58:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 03:58:55,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:55,011 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:55,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:58:55,229 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1525859513, now seen corresponding path program 1 times [2022-11-03 03:58:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:55,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801693946] [2022-11-03 03:58:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:55,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:55,231 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:55,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 03:58:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:58:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 96 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:58:56,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 96 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:58:57,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:57,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801693946] [2022-11-03 03:58:57,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801693946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:57,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471586722] [2022-11-03 03:58:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:57,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:57,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:57,398 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:57,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-03 03:58:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:58:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 89 proven. 264 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:59:00,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 89 proven. 264 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:59:02,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471586722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:02,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126237804] [2022-11-03 03:59:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:02,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:02,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:02,497 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:02,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-03 03:59:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:02,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:59:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 96 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:59:03,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 96 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:59:03,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126237804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:03,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:59:03,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22, 22, 19, 19] total 74 [2022-11-03 03:59:03,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760570738] [2022-11-03 03:59:03,759 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-03 03:59:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-03 03:59:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=5213, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 03:59:03,761 INFO L87 Difference]: Start difference. First operand 59912 states and 72148 transitions. Second operand has 74 states, 74 states have (on average 9.878378378378379) internal successors, (731), 74 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:38,673 INFO L93 Difference]: Finished difference Result 229000 states and 282959 transitions. [2022-11-03 03:59:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-11-03 03:59:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 9.878378378378379) internal successors, (731), 74 states have internal predecessors, (731), 0 states have call successors, (0), 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 249 [2022-11-03 03:59:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:38,786 INFO L225 Difference]: With dead ends: 229000 [2022-11-03 03:59:38,786 INFO L226 Difference]: Without dead ends: 166929 [2022-11-03 03:59:38,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1521 SyntacticMatches, 45 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37660 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=15272, Invalid=83638, Unknown=0, NotChecked=0, Total=98910 [2022-11-03 03:59:38,813 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 11525 mSDsluCounter, 16935 mSDsCounter, 0 mSdLazyCounter, 5257 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11525 SdHoareTripleChecker+Valid, 17346 SdHoareTripleChecker+Invalid, 8548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 5257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2688 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:38,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11525 Valid, 17346 Invalid, 8548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 5257 Invalid, 0 Unknown, 2688 Unchecked, 4.7s Time] [2022-11-03 03:59:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166929 states. [2022-11-03 03:59:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166929 to 65850. [2022-11-03 03:59:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65850 states, 65849 states have (on average 1.2097678020926665) internal successors, (79662), 65849 states have internal predecessors, (79662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65850 states to 65850 states and 79662 transitions. [2022-11-03 03:59:40,575 INFO L78 Accepts]: Start accepts. Automaton has 65850 states and 79662 transitions. Word has length 249 [2022-11-03 03:59:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:40,576 INFO L495 AbstractCegarLoop]: Abstraction has 65850 states and 79662 transitions. [2022-11-03 03:59:40,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 9.878378378378379) internal successors, (731), 74 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 65850 states and 79662 transitions. [2022-11-03 03:59:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 03:59:40,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:40,599 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:59:40,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2022-11-03 03:59:40,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:41,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 03:59:41,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:41,200 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:41,201 INFO L85 PathProgramCache]: Analyzing trace with hash 18476155, now seen corresponding path program 1 times [2022-11-03 03:59:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:41,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237215529] [2022-11-03 03:59:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:41,202 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:41,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 03:59:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:41,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:59:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 194 proven. 152 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:59:42,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 194 proven. 152 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:59:43,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237215529] [2022-11-03 03:59:43,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237215529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1328332456] [2022-11-03 03:59:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:43,564 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:59:43,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:59:43,564 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:59:43,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2022-11-03 03:59:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:44,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 03:59:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 36 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-03 03:59:45,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 188 proven. 21 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-03 03:59:46,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1328332456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:46,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115832979] [2022-11-03 03:59:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:46,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:46,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:46,935 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:46,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-03 03:59:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:47,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:59:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 194 proven. 152 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:59:47,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 194 proven. 152 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:59:48,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115832979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:48,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:59:48,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 16, 16, 19, 19] total 60 [2022-11-03 03:59:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935248750] [2022-11-03 03:59:48,317 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:48,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-03 03:59:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-03 03:59:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 03:59:48,319 INFO L87 Difference]: Start difference. First operand 65850 states and 79662 transitions. Second operand has 60 states, 60 states have (on average 9.333333333333334) internal successors, (560), 60 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:56,240 INFO L93 Difference]: Finished difference Result 451879 states and 543125 transitions. [2022-11-03 04:00:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 692 states. [2022-11-03 04:00:56,240 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 9.333333333333334) internal successors, (560), 60 states have internal predecessors, (560), 0 states have call successors, (0), 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 249 [2022-11-03 04:00:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:56,653 INFO L225 Difference]: With dead ends: 451879 [2022-11-03 04:00:56,653 INFO L226 Difference]: Without dead ends: 377830 [2022-11-03 04:00:56,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2178 GetRequests, 1427 SyntacticMatches, 3 SemanticMatches, 748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244468 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=52785, Invalid=508965, Unknown=0, NotChecked=0, Total=561750 [2022-11-03 04:00:56,733 INFO L413 NwaCegarLoop]: 945 mSDtfsCounter, 14527 mSDsluCounter, 30866 mSDsCounter, 0 mSdLazyCounter, 11755 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14527 SdHoareTripleChecker+Valid, 31811 SdHoareTripleChecker+Invalid, 12386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 11755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:56,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14527 Valid, 31811 Invalid, 12386 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [631 Valid, 11755 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-03 04:00:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377830 states. [2022-11-03 04:00:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377830 to 81441. [2022-11-03 04:00:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81441 states, 81440 states have (on average 1.2098231827111985) internal successors, (98528), 81440 states have internal predecessors, (98528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81441 states to 81441 states and 98528 transitions. [2022-11-03 04:00:59,651 INFO L78 Accepts]: Start accepts. Automaton has 81441 states and 98528 transitions. Word has length 249 [2022-11-03 04:00:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:59,652 INFO L495 AbstractCegarLoop]: Abstraction has 81441 states and 98528 transitions. [2022-11-03 04:00:59,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 9.333333333333334) internal successors, (560), 60 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 81441 states and 98528 transitions. [2022-11-03 04:00:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 04:00:59,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:59,687 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:59,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Ended with exit code 0 [2022-11-03 04:00:59,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:00,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-03 04:01:00,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:00,288 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1994918343, now seen corresponding path program 7 times [2022-11-03 04:01:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:00,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164800775] [2022-11-03 04:01:00,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:01:00,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:00,291 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:00,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-03 04:01:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:01:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 46 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 04:01:01,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 46 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 04:01:01,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164800775] [2022-11-03 04:01:01,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164800775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368477229] [2022-11-03 04:01:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:01:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:01,858 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:01,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2022-11-03 04:01:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:02,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:01:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 46 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 04:01:03,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 46 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 04:01:03,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368477229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:03,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77191617] [2022-11-03 04:01:03,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:01:03,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:03,883 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:03,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-03 04:01:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:04,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:01:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 46 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 04:01:05,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 173 proven. 46 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 04:01:05,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77191617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:05,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:05,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 04:01:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120073355] [2022-11-03 04:01:05,430 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:05,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:01:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:01:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:01:05,432 INFO L87 Difference]: Start difference. First operand 81441 states and 98528 transitions. Second operand has 22 states, 22 states have (on average 11.863636363636363) internal successors, (261), 22 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:08,862 INFO L93 Difference]: Finished difference Result 258484 states and 310702 transitions. [2022-11-03 04:01:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 04:01:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 11.863636363636363) internal successors, (261), 22 states have internal predecessors, (261), 0 states have call successors, (0), 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 249 [2022-11-03 04:01:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:09,179 INFO L225 Difference]: With dead ends: 258484 [2022-11-03 04:01:09,179 INFO L226 Difference]: Without dead ends: 214483 [2022-11-03 04:01:09,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1468 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=866, Invalid=2794, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 04:01:09,208 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1283 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 3772 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:09,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 3772 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:01:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214483 states. [2022-11-03 04:01:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214483 to 81749. [2022-11-03 04:01:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81749 states, 81748 states have (on average 1.209228360326858) internal successors, (98852), 81748 states have internal predecessors, (98852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81749 states to 81749 states and 98852 transitions. [2022-11-03 04:01:11,547 INFO L78 Accepts]: Start accepts. Automaton has 81749 states and 98852 transitions. Word has length 249 [2022-11-03 04:01:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:11,548 INFO L495 AbstractCegarLoop]: Abstraction has 81749 states and 98852 transitions. [2022-11-03 04:01:11,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.863636363636363) internal successors, (261), 22 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 81749 states and 98852 transitions. [2022-11-03 04:01:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 04:01:11,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:11,575 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:11,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:11,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (112)] Ended with exit code 0 [2022-11-03 04:01:11,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:12,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:12,176 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1199934273, now seen corresponding path program 5 times [2022-11-03 04:01:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:12,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878041837] [2022-11-03 04:01:12,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:01:12,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:12,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:12,178 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:12,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-03 04:01:12,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 04:01:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:12,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 04:01:12,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 92 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:18,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 96 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:28,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:28,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878041837] [2022-11-03 04:01:28,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878041837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:28,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1668294383] [2022-11-03 04:01:28,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:01:28,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:28,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:28,523 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:28,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-03 04:01:29,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 04:01:29,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 04:01:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 278 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 04:01:34,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 206 proven. 128 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 04:01:42,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1668294383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:42,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872183138] [2022-11-03 04:01:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:01:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:42,301 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:42,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437d8295-5d98-473b-8489-5350d1dc3115/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-03 04:01:42,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 04:01:42,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:42,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 04:01:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 217 proven. 32 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-03 04:01:44,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 200 proven. 83 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 04:01:52,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872183138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:52,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:52,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 32, 33, 19, 21] total 118 [2022-11-03 04:01:52,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014477647] [2022-11-03 04:01:52,011 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:52,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-03 04:01:52,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-03 04:01:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1494, Invalid=12312, Unknown=0, NotChecked=0, Total=13806 [2022-11-03 04:01:52,013 INFO L87 Difference]: Start difference. First operand 81749 states and 98852 transitions. Second operand has 118 states, 118 states have (on average 8.635593220338983) internal successors, (1019), 118 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:43,731 INFO L93 Difference]: Finished difference Result 412173 states and 498699 transitions. [2022-11-03 04:02:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-11-03 04:02:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 8.635593220338983) internal successors, (1019), 118 states have internal predecessors, (1019), 0 states have call successors, (0), 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 249 [2022-11-03 04:02:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:44,113 INFO L225 Difference]: With dead ends: 412173 [2022-11-03 04:02:44,113 INFO L226 Difference]: Without dead ends: 412171 [2022-11-03 04:02:44,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1795 GetRequests, 1449 SyntacticMatches, 48 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 34918 ImplicationChecksByTransitivity, 66.1s TimeCoverageRelationStatistics Valid=9158, Invalid=80542, Unknown=0, NotChecked=0, Total=89700 [2022-11-03 04:02:44,174 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 4181 mSDsluCounter, 12153 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 12349 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2016 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:44,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4181 Valid, 12349 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 425 Invalid, 0 Unknown, 2016 Unchecked, 0.3s Time] [2022-11-03 04:02:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412171 states. [2022-11-03 04:02:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412171 to 277262. [2022-11-03 04:02:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277262 states, 277261 states have (on average 1.2187758105178874) internal successors, (337919), 277261 states have internal predecessors, (337919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277262 states to 277262 states and 337919 transitions. [2022-11-03 04:02:51,679 INFO L78 Accepts]: Start accepts. Automaton has 277262 states and 337919 transitions. Word has length 249 [2022-11-03 04:02:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:51,680 INFO L495 AbstractCegarLoop]: Abstraction has 277262 states and 337919 transitions. [2022-11-03 04:02:51,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 8.635593220338983) internal successors, (1019), 118 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 277262 states and 337919 transitions.