./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 03:06:25,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:06:25,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:06:25,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:06:25,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:06:25,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:06:25,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:06:25,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:06:25,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:06:25,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:06:25,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:06:25,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:06:25,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:06:25,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:06:25,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:06:25,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:06:25,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:06:25,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:06:25,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:06:25,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:06:25,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:06:25,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:06:25,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:06:25,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:06:25,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:06:25,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:06:25,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:06:25,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:06:25,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:06:25,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:06:25,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:06:25,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:06:25,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:06:25,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:06:25,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:06:25,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:06:25,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:06:25,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:06:25,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:06:25,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:06:25,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:06:25,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:06:25,521 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:06:25,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:06:25,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:06:25,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:06:25,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:06:25,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:06:25,528 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:06:25,528 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:06:25,528 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:06:25,528 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:06:25,528 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:06:25,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:06:25,529 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:06:25,529 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:06:25,529 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:06:25,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:06:25,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:06:25,529 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:06:25,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:06:25,530 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:06:25,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:06:25,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:06:25,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:06:25,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:06:25,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:06:25,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:06:25,532 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:06:25,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:06:25,532 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:06:25,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:06:25,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:06:25,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:06:25,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:06:25,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:06:25,533 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:06:25,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:06:25,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:06:25,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:06:25,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:06:25,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:06:25,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:06:25,534 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_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 [2022-12-14 03:06:25,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:06:25,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:06:25,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:06:25,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:06:25,732 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:06:25,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-12-14 03:06:28,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:06:28,472 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:06:28,472 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-12-14 03:06:28,478 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/data/1d0f39010/0e09c7055b1a4b31a7d7d0dc45c71ad8/FLAG3da94af89 [2022-12-14 03:06:28,489 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/data/1d0f39010/0e09c7055b1a4b31a7d7d0dc45c71ad8 [2022-12-14 03:06:28,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:06:28,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:06:28,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:06:28,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:06:28,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:06:28,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ebc5e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28, skipping insertion in model container [2022-12-14 03:06:28,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:06:28,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:06:28,617 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-12-14 03:06:28,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:06:28,665 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:06:28,673 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-12-14 03:06:28,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:06:28,705 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:06:28,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28 WrapperNode [2022-12-14 03:06:28,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:06:28,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:06:28,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:06:28,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:06:28,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,735 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 331 [2022-12-14 03:06:28,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:06:28,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:06:28,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:06:28,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:06:28,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:06:28,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:06:28,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:06:28,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:06:28,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (1/1) ... [2022-12-14 03:06:28,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:06:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:28,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:06:28,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:06:28,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:06:28,823 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 03:06:28,823 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 03:06:28,824 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 03:06:28,824 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 03:06:28,824 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 03:06:28,824 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 03:06:28,824 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 03:06:28,824 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 03:06:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 03:06:28,825 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 03:06:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:06:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 03:06:28,825 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 03:06:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:06:28,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:06:28,891 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:06:28,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:06:29,188 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:06:29,329 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:06:29,329 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 03:06:29,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:06:29 BoogieIcfgContainer [2022-12-14 03:06:29,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:06:29,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:06:29,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:06:29,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:06:29,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:06:28" (1/3) ... [2022-12-14 03:06:29,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8ea29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:06:29, skipping insertion in model container [2022-12-14 03:06:29,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:06:28" (2/3) ... [2022-12-14 03:06:29,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8ea29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:06:29, skipping insertion in model container [2022-12-14 03:06:29,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:06:29" (3/3) ... [2022-12-14 03:06:29,339 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2022-12-14 03:06:29,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:06:29,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:06:29,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:06:29,405 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;@64e9b523, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:06:29,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:06:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 03:06:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 03:06:29,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:29,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:29,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 65480675, now seen corresponding path program 1 times [2022-12-14 03:06:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:29,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94383885] [2022-12-14 03:06:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:06:29,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94383885] [2022-12-14 03:06:29,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94383885] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:29,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:29,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:06:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771683708] [2022-12-14 03:06:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:29,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:06:29,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:06:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:06:29,722 INFO L87 Difference]: Start difference. First operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 03:06:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:29,941 INFO L93 Difference]: Finished difference Result 251 states and 373 transitions. [2022-12-14 03:06:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:06:29,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-12-14 03:06:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:29,949 INFO L225 Difference]: With dead ends: 251 [2022-12-14 03:06:29,949 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 03:06:29,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:06:29,954 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 215 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:29,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 306 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:06:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 03:06:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-12-14 03:06:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.411764705882353) internal successors, (168), 121 states have internal predecessors, (168), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 03:06:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 228 transitions. [2022-12-14 03:06:30,006 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 228 transitions. Word has length 39 [2022-12-14 03:06:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:30,006 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 228 transitions. [2022-12-14 03:06:30,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 03:06:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 228 transitions. [2022-12-14 03:06:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 03:06:30,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:30,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:30,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:06:30,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -119200591, now seen corresponding path program 1 times [2022-12-14 03:06:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154079328] [2022-12-14 03:06:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:30,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 03:06:30,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:30,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154079328] [2022-12-14 03:06:30,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154079328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:30,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917517149] [2022-12-14 03:06:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:30,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:30,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:30,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:30,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:06:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:30,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:06:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:06:30,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917517149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:30,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:30,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 03:06:30,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413349933] [2022-12-14 03:06:30,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:30,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:30,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:30,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:30,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:06:30,310 INFO L87 Difference]: Start difference. First operand 162 states and 228 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 03:06:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:30,399 INFO L93 Difference]: Finished difference Result 469 states and 669 transitions. [2022-12-14 03:06:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-12-14 03:06:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:30,404 INFO L225 Difference]: With dead ends: 469 [2022-12-14 03:06:30,404 INFO L226 Difference]: Without dead ends: 312 [2022-12-14 03:06:30,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:06:30,407 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 97 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:30,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:06:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-14 03:06:30,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2022-12-14 03:06:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 229 states have (on average 1.4017467248908297) internal successors, (321), 232 states have internal predecessors, (321), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-12-14 03:06:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 429 transitions. [2022-12-14 03:06:30,446 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 429 transitions. Word has length 72 [2022-12-14 03:06:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:30,446 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 429 transitions. [2022-12-14 03:06:30,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 03:06:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 429 transitions. [2022-12-14 03:06:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 03:06:30,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:30,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:30,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:06:30,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:30,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 387001843, now seen corresponding path program 1 times [2022-12-14 03:06:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:30,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332242242] [2022-12-14 03:06:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:30,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 03:06:30,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332242242] [2022-12-14 03:06:30,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332242242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101706342] [2022-12-14 03:06:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:30,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:30,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:30,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:30,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:06:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:30,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:06:30,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:06:30,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:30,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101706342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:30,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:30,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 03:06:30,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365060772] [2022-12-14 03:06:30,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:30,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:06:30,968 INFO L87 Difference]: Start difference. First operand 308 states and 429 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 03:06:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:31,060 INFO L93 Difference]: Finished difference Result 901 states and 1272 transitions. [2022-12-14 03:06:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-12-14 03:06:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:31,065 INFO L225 Difference]: With dead ends: 901 [2022-12-14 03:06:31,065 INFO L226 Difference]: Without dead ends: 598 [2022-12-14 03:06:31,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:06:31,069 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 100 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:31,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 203 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-12-14 03:06:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 592. [2022-12-14 03:06:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 443 states have (on average 1.3882618510158014) internal successors, (615), 448 states have internal predecessors, (615), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-12-14 03:06:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 815 transitions. [2022-12-14 03:06:31,123 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 815 transitions. Word has length 72 [2022-12-14 03:06:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:31,123 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 815 transitions. [2022-12-14 03:06:31,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 03:06:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 815 transitions. [2022-12-14 03:06:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 03:06:31,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:31,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:31,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:06:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:31,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:31,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1033536881, now seen corresponding path program 1 times [2022-12-14 03:06:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:31,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453401949] [2022-12-14 03:06:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:31,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 03:06:31,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:31,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453401949] [2022-12-14 03:06:31,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453401949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:31,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:31,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 03:06:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511873740] [2022-12-14 03:06:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:06:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:06:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:31,652 INFO L87 Difference]: Start difference. First operand 592 states and 815 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 03:06:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:31,941 INFO L93 Difference]: Finished difference Result 1876 states and 2586 transitions. [2022-12-14 03:06:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:06:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 72 [2022-12-14 03:06:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:31,947 INFO L225 Difference]: With dead ends: 1876 [2022-12-14 03:06:31,947 INFO L226 Difference]: Without dead ends: 1290 [2022-12-14 03:06:31,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 03:06:31,949 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 336 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:31,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 285 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:06:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-12-14 03:06:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1128. [2022-12-14 03:06:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 843 states have (on average 1.3701067615658362) internal successors, (1155), 852 states have internal predecessors, (1155), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-12-14 03:06:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1531 transitions. [2022-12-14 03:06:32,012 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1531 transitions. Word has length 72 [2022-12-14 03:06:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:32,012 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1531 transitions. [2022-12-14 03:06:32,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 03:06:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1531 transitions. [2022-12-14 03:06:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 03:06:32,014 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:32,015 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 03:06:32,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 03:06:32,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:32,015 INFO L85 PathProgramCache]: Analyzing trace with hash 769669669, now seen corresponding path program 1 times [2022-12-14 03:06:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:32,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098605829] [2022-12-14 03:06:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:32,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 03:06:32,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:32,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098605829] [2022-12-14 03:06:32,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098605829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:32,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:32,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 03:06:32,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202453286] [2022-12-14 03:06:32,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:32,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:06:32,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:06:32,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:32,265 INFO L87 Difference]: Start difference. First operand 1128 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 03:06:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:32,569 INFO L93 Difference]: Finished difference Result 2884 states and 3933 transitions. [2022-12-14 03:06:32,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:06:32,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-12-14 03:06:32,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:32,575 INFO L225 Difference]: With dead ends: 2884 [2022-12-14 03:06:32,576 INFO L226 Difference]: Without dead ends: 1762 [2022-12-14 03:06:32,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 03:06:32,579 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 301 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:32,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 273 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:06:32,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-12-14 03:06:32,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1656. [2022-12-14 03:06:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1235 states have (on average 1.3562753036437247) internal successors, (1675), 1248 states have internal predecessors, (1675), 276 states have call successors, (276), 144 states have call predecessors, (276), 144 states have return successors, (276), 264 states have call predecessors, (276), 276 states have call successors, (276) [2022-12-14 03:06:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2227 transitions. [2022-12-14 03:06:32,687 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2227 transitions. Word has length 73 [2022-12-14 03:06:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:32,687 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2227 transitions. [2022-12-14 03:06:32,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 03:06:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2227 transitions. [2022-12-14 03:06:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 03:06:32,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:32,691 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 03:06:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 03:06:32,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1856072203, now seen corresponding path program 1 times [2022-12-14 03:06:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:32,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121605773] [2022-12-14 03:06:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:32,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 03:06:32,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121605773] [2022-12-14 03:06:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121605773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:32,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:32,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:06:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653436524] [2022-12-14 03:06:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:32,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:32,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:06:32,739 INFO L87 Difference]: Start difference. First operand 1656 states and 2227 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 03:06:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:32,879 INFO L93 Difference]: Finished difference Result 2914 states and 3962 transitions. [2022-12-14 03:06:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-12-14 03:06:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:32,886 INFO L225 Difference]: With dead ends: 2914 [2022-12-14 03:06:32,886 INFO L226 Difference]: Without dead ends: 2064 [2022-12-14 03:06:32,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:06:32,889 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 45 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:32,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 255 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-12-14 03:06:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1870. [2022-12-14 03:06:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1425 states have (on average 1.3803508771929824) internal successors, (1967), 1438 states have internal predecessors, (1967), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-12-14 03:06:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2543 transitions. [2022-12-14 03:06:33,009 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2543 transitions. Word has length 74 [2022-12-14 03:06:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:33,009 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2543 transitions. [2022-12-14 03:06:33,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 03:06:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2543 transitions. [2022-12-14 03:06:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 03:06:33,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:33,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 03:06:33,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -120761848, now seen corresponding path program 1 times [2022-12-14 03:06:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:33,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084833231] [2022-12-14 03:06:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 03:06:33,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:33,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084833231] [2022-12-14 03:06:33,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084833231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:33,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:33,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:06:33,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421908471] [2022-12-14 03:06:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:33,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:33,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:33,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:06:33,071 INFO L87 Difference]: Start difference. First operand 1870 states and 2543 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 03:06:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:33,283 INFO L93 Difference]: Finished difference Result 4662 states and 6380 transitions. [2022-12-14 03:06:33,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-12-14 03:06:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:33,297 INFO L225 Difference]: With dead ends: 4662 [2022-12-14 03:06:33,297 INFO L226 Difference]: Without dead ends: 2797 [2022-12-14 03:06:33,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:06:33,304 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 93 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:33,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 226 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:33,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-12-14 03:06:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2777. [2022-12-14 03:06:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2118 states have (on average 1.3640226628895185) internal successors, (2889), 2137 states have internal predecessors, (2889), 424 states have call successors, (424), 234 states have call predecessors, (424), 234 states have return successors, (424), 406 states have call predecessors, (424), 424 states have call successors, (424) [2022-12-14 03:06:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3737 transitions. [2022-12-14 03:06:33,458 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3737 transitions. Word has length 96 [2022-12-14 03:06:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:33,458 INFO L495 AbstractCegarLoop]: Abstraction has 2777 states and 3737 transitions. [2022-12-14 03:06:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 03:06:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3737 transitions. [2022-12-14 03:06:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 03:06:33,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:33,464 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:33,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 03:06:33,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -736293753, now seen corresponding path program 1 times [2022-12-14 03:06:33,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:33,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096855331] [2022-12-14 03:06:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:33,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 03:06:33,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:33,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096855331] [2022-12-14 03:06:33,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096855331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:33,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906301355] [2022-12-14 03:06:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:33,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:33,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:33,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:06:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:06:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 03:06:33,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:33,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906301355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:33,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:33,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 03:06:33,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322492047] [2022-12-14 03:06:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:33,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:33,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:33,653 INFO L87 Difference]: Start difference. First operand 2777 states and 3737 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:33,836 INFO L93 Difference]: Finished difference Result 5252 states and 7137 transitions. [2022-12-14 03:06:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:33,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-12-14 03:06:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:33,847 INFO L225 Difference]: With dead ends: 5252 [2022-12-14 03:06:33,848 INFO L226 Difference]: Without dead ends: 3400 [2022-12-14 03:06:33,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:33,852 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 60 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:33,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 266 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-12-14 03:06:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3068. [2022-12-14 03:06:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 2373 states have (on average 1.381795195954488) internal successors, (3279), 2392 states have internal predecessors, (3279), 442 states have call successors, (442), 252 states have call predecessors, (442), 252 states have return successors, (442), 424 states have call predecessors, (442), 442 states have call successors, (442) [2022-12-14 03:06:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4163 transitions. [2022-12-14 03:06:34,004 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4163 transitions. Word has length 111 [2022-12-14 03:06:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:34,004 INFO L495 AbstractCegarLoop]: Abstraction has 3068 states and 4163 transitions. [2022-12-14 03:06:34,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4163 transitions. [2022-12-14 03:06:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 03:06:34,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:34,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:34,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:06:34,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 03:06:34,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1696313464, now seen corresponding path program 2 times [2022-12-14 03:06:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:34,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552829015] [2022-12-14 03:06:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 03:06:34,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552829015] [2022-12-14 03:06:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552829015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125189230] [2022-12-14 03:06:34,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:06:34,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:34,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:34,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:06:34,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:06:34,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:06:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 03:06:34,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 03:06:34,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:06:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 03:06:35,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125189230] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:35,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:06:35,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-14 03:06:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840534120] [2022-12-14 03:06:35,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:35,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:06:35,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:35,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:06:35,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 03:06:35,073 INFO L87 Difference]: Start difference. First operand 3068 states and 4163 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-14 03:06:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:35,556 INFO L93 Difference]: Finished difference Result 7527 states and 10177 transitions. [2022-12-14 03:06:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:06:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 111 [2022-12-14 03:06:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:35,577 INFO L225 Difference]: With dead ends: 7527 [2022-12-14 03:06:35,577 INFO L226 Difference]: Without dead ends: 4465 [2022-12-14 03:06:35,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-14 03:06:35,585 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 277 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:35,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 241 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:06:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2022-12-14 03:06:35,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 4463. [2022-12-14 03:06:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3432 states have (on average 1.354020979020979) internal successors, (4647), 3460 states have internal predecessors, (4647), 652 states have call successors, (652), 378 states have call predecessors, (652), 378 states have return successors, (652), 625 states have call predecessors, (652), 652 states have call successors, (652) [2022-12-14 03:06:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 5951 transitions. [2022-12-14 03:06:35,944 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 5951 transitions. Word has length 111 [2022-12-14 03:06:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:35,944 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 5951 transitions. [2022-12-14 03:06:35,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-14 03:06:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 5951 transitions. [2022-12-14 03:06:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 03:06:35,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:35,955 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:35,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:06:36,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:36,156 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1823278182, now seen corresponding path program 1 times [2022-12-14 03:06:36,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:36,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860768509] [2022-12-14 03:06:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:36,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 03:06:36,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:36,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860768509] [2022-12-14 03:06:36,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860768509] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:36,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78666150] [2022-12-14 03:06:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:36,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:36,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:36,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:36,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:06:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:06:36,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 03:06:36,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78666150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:36,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:36,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 03:06:36,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717864974] [2022-12-14 03:06:36,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:36,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:36,364 INFO L87 Difference]: Start difference. First operand 4463 states and 5951 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:36,646 INFO L93 Difference]: Finished difference Result 8514 states and 11449 transitions. [2022-12-14 03:06:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-12-14 03:06:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:36,672 INFO L225 Difference]: With dead ends: 8514 [2022-12-14 03:06:36,672 INFO L226 Difference]: Without dead ends: 5542 [2022-12-14 03:06:36,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:36,678 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 65 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:36,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 271 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2022-12-14 03:06:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4982. [2022-12-14 03:06:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4982 states, 3879 states have (on average 1.3642691415313226) internal successors, (5292), 3907 states have internal predecessors, (5292), 688 states have call successors, (688), 414 states have call predecessors, (688), 414 states have return successors, (688), 661 states have call predecessors, (688), 688 states have call successors, (688) [2022-12-14 03:06:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 6668 transitions. [2022-12-14 03:06:36,957 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 6668 transitions. Word has length 113 [2022-12-14 03:06:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:36,957 INFO L495 AbstractCegarLoop]: Abstraction has 4982 states and 6668 transitions. [2022-12-14 03:06:36,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 6668 transitions. [2022-12-14 03:06:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 03:06:36,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:36,965 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:36,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:06:37,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 03:06:37,166 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1686267959, now seen corresponding path program 2 times [2022-12-14 03:06:37,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:37,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208933014] [2022-12-14 03:06:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:37,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 03:06:37,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208933014] [2022-12-14 03:06:37,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208933014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917182164] [2022-12-14 03:06:37,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:06:37,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:37,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:37,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:37,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:06:37,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:06:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:06:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 03:06:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 23 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 03:06:37,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:06:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 03:06:37,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917182164] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:37,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:06:37,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2022-12-14 03:06:37,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231775825] [2022-12-14 03:06:37,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:37,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:06:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:06:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 03:06:37,768 INFO L87 Difference]: Start difference. First operand 4982 states and 6668 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:38,131 INFO L93 Difference]: Finished difference Result 9913 states and 13398 transitions. [2022-12-14 03:06:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:06:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-12-14 03:06:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:38,156 INFO L225 Difference]: With dead ends: 9913 [2022-12-14 03:06:38,156 INFO L226 Difference]: Without dead ends: 6422 [2022-12-14 03:06:38,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 03:06:38,163 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 111 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:38,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 271 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:06:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6422 states. [2022-12-14 03:06:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6422 to 6230. [2022-12-14 03:06:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 5019 states have (on average 1.3460848774656307) internal successors, (6756), 5047 states have internal predecessors, (6756), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-12-14 03:06:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 8216 transitions. [2022-12-14 03:06:38,531 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 8216 transitions. Word has length 113 [2022-12-14 03:06:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:38,531 INFO L495 AbstractCegarLoop]: Abstraction has 6230 states and 8216 transitions. [2022-12-14 03:06:38,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 8216 transitions. [2022-12-14 03:06:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 03:06:38,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:38,552 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:38,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 03:06:38,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 03:06:38,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash 454159575, now seen corresponding path program 1 times [2022-12-14 03:06:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:38,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376741245] [2022-12-14 03:06:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:38,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 03:06:38,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376741245] [2022-12-14 03:06:38,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376741245] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585771587] [2022-12-14 03:06:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:38,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:38,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:38,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:06:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:06:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:06:38,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:38,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585771587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:38,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:38,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 03:06:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713348527] [2022-12-14 03:06:38,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:38,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:38,999 INFO L87 Difference]: Start difference. First operand 6230 states and 8216 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:39,352 INFO L93 Difference]: Finished difference Result 10440 states and 14070 transitions. [2022-12-14 03:06:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-12-14 03:06:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:39,366 INFO L225 Difference]: With dead ends: 10440 [2022-12-14 03:06:39,366 INFO L226 Difference]: Without dead ends: 6250 [2022-12-14 03:06:39,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:39,373 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 88 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:39,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 262 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2022-12-14 03:06:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 6170. [2022-12-14 03:06:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 4959 states have (on average 1.3139745916515426) internal successors, (6516), 4987 states have internal predecessors, (6516), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-12-14 03:06:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 7976 transitions. [2022-12-14 03:06:39,688 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 7976 transitions. Word has length 113 [2022-12-14 03:06:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:39,688 INFO L495 AbstractCegarLoop]: Abstraction has 6170 states and 7976 transitions. [2022-12-14 03:06:39,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 7976 transitions. [2022-12-14 03:06:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 03:06:39,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:39,697 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:39,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 03:06:39,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 03:06:39,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 89153591, now seen corresponding path program 1 times [2022-12-14 03:06:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:39,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267885385] [2022-12-14 03:06:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 03:06:40,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267885385] [2022-12-14 03:06:40,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267885385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138316875] [2022-12-14 03:06:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:40,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:40,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:40,082 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:40,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 03:06:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:06:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 03:06:40,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:40,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138316875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:40,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:40,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 03:06:40,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728245231] [2022-12-14 03:06:40,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:40,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:40,208 INFO L87 Difference]: Start difference. First operand 6170 states and 7976 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:40,589 INFO L93 Difference]: Finished difference Result 11251 states and 14618 transitions. [2022-12-14 03:06:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-12-14 03:06:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:40,603 INFO L225 Difference]: With dead ends: 11251 [2022-12-14 03:06:40,604 INFO L226 Difference]: Without dead ends: 7151 [2022-12-14 03:06:40,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:40,611 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 99 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:40,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-12-14 03:06:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 7151. [2022-12-14 03:06:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 5826 states have (on average 1.2868177136972194) internal successors, (7497), 5854 states have internal predecessors, (7497), 736 states have call successors, (736), 588 states have call predecessors, (736), 588 states have return successors, (784), 709 states have call predecessors, (784), 736 states have call successors, (784) [2022-12-14 03:06:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 9017 transitions. [2022-12-14 03:06:40,970 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 9017 transitions. Word has length 113 [2022-12-14 03:06:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:40,970 INFO L495 AbstractCegarLoop]: Abstraction has 7151 states and 9017 transitions. [2022-12-14 03:06:40,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 9017 transitions. [2022-12-14 03:06:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 03:06:40,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:40,977 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:40,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 03:06:41,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:41,178 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1820351176, now seen corresponding path program 1 times [2022-12-14 03:06:41,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:41,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614806212] [2022-12-14 03:06:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:41,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 03:06:41,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:41,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614806212] [2022-12-14 03:06:41,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614806212] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:41,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682834946] [2022-12-14 03:06:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:41,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:41,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:41,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 03:06:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:06:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:06:41,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682834946] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:41,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:41,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 03:06:41,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329925796] [2022-12-14 03:06:41,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:41,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:41,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:41,405 INFO L87 Difference]: Start difference. First operand 7151 states and 9017 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:41,862 INFO L93 Difference]: Finished difference Result 12068 states and 15528 transitions. [2022-12-14 03:06:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2022-12-14 03:06:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:41,878 INFO L225 Difference]: With dead ends: 12068 [2022-12-14 03:06:41,878 INFO L226 Difference]: Without dead ends: 7099 [2022-12-14 03:06:41,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:41,885 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:41,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 274 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-12-14 03:06:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7043. [2022-12-14 03:06:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7043 states, 5730 states have (on average 1.2581151832460733) internal successors, (7209), 5746 states have internal predecessors, (7209), 736 states have call successors, (736), 588 states have call predecessors, (736), 576 states have return successors, (772), 709 states have call predecessors, (772), 736 states have call successors, (772) [2022-12-14 03:06:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 8717 transitions. [2022-12-14 03:06:42,261 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 8717 transitions. Word has length 114 [2022-12-14 03:06:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:42,262 INFO L495 AbstractCegarLoop]: Abstraction has 7043 states and 8717 transitions. [2022-12-14 03:06:42,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 8717 transitions. [2022-12-14 03:06:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 03:06:42,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:42,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:42,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 03:06:42,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:42,470 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash 782250598, now seen corresponding path program 1 times [2022-12-14 03:06:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:42,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323770831] [2022-12-14 03:06:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 03:06:42,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323770831] [2022-12-14 03:06:42,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323770831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168154487] [2022-12-14 03:06:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:42,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:42,580 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:42,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 03:06:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 03:06:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:06:42,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:42,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168154487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:42,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:42,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 03:06:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992666534] [2022-12-14 03:06:42,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:06:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:06:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 03:06:42,690 INFO L87 Difference]: Start difference. First operand 7043 states and 8717 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 03:06:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:43,126 INFO L93 Difference]: Finished difference Result 10154 states and 12597 transitions. [2022-12-14 03:06:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:06:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-12-14 03:06:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:43,138 INFO L225 Difference]: With dead ends: 10154 [2022-12-14 03:06:43,139 INFO L226 Difference]: Without dead ends: 7527 [2022-12-14 03:06:43,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 03:06:43,142 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 104 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:43,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 424 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:06:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2022-12-14 03:06:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 7303. [2022-12-14 03:06:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 5940 states have (on average 1.2533670033670035) internal successors, (7445), 5974 states have internal predecessors, (7445), 744 states have call successors, (744), 594 states have call predecessors, (744), 618 states have return successors, (816), 735 states have call predecessors, (816), 744 states have call successors, (816) [2022-12-14 03:06:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 9005 transitions. [2022-12-14 03:06:43,580 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 9005 transitions. Word has length 116 [2022-12-14 03:06:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:43,581 INFO L495 AbstractCegarLoop]: Abstraction has 7303 states and 9005 transitions. [2022-12-14 03:06:43,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 03:06:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 9005 transitions. [2022-12-14 03:06:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 03:06:43,590 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:43,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:43,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 03:06:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 03:06:43,791 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash 181987543, now seen corresponding path program 1 times [2022-12-14 03:06:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:43,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972296118] [2022-12-14 03:06:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 03:06:43,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972296118] [2022-12-14 03:06:43,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972296118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501172517] [2022-12-14 03:06:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:43,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:43,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:43,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:43,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 03:06:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:06:44,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 03:06:44,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:44,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501172517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:44,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:44,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 03:06:44,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390505975] [2022-12-14 03:06:44,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:44,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:44,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:44,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:44,063 INFO L87 Difference]: Start difference. First operand 7303 states and 9005 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:44,444 INFO L93 Difference]: Finished difference Result 9996 states and 12452 transitions. [2022-12-14 03:06:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-12-14 03:06:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:44,456 INFO L225 Difference]: With dead ends: 9996 [2022-12-14 03:06:44,456 INFO L226 Difference]: Without dead ends: 7045 [2022-12-14 03:06:44,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:44,460 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:44,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 213 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2022-12-14 03:06:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 6625. [2022-12-14 03:06:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5370 states have (on average 1.2562383612662942) internal successors, (6746), 5377 states have internal predecessors, (6746), 708 states have call successors, (708), 558 states have call predecessors, (708), 546 states have return successors, (744), 690 states have call predecessors, (744), 708 states have call successors, (744) [2022-12-14 03:06:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 8198 transitions. [2022-12-14 03:06:44,802 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 8198 transitions. Word has length 117 [2022-12-14 03:06:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:44,803 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 8198 transitions. [2022-12-14 03:06:44,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 8198 transitions. [2022-12-14 03:06:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 03:06:44,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:44,809 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:44,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 03:06:45,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 03:06:45,010 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1005346909, now seen corresponding path program 1 times [2022-12-14 03:06:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993457722] [2022-12-14 03:06:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:45,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 03:06:45,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:45,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993457722] [2022-12-14 03:06:45,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993457722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:45,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257998661] [2022-12-14 03:06:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:45,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:45,155 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:45,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 03:06:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:06:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 03:06:45,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:45,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257998661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:45,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:45,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 03:06:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759144337] [2022-12-14 03:06:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:45,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:45,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:45,266 INFO L87 Difference]: Start difference. First operand 6625 states and 8198 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:45,753 INFO L93 Difference]: Finished difference Result 15683 states and 19643 transitions. [2022-12-14 03:06:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-12-14 03:06:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:45,769 INFO L225 Difference]: With dead ends: 15683 [2022-12-14 03:06:45,769 INFO L226 Difference]: Without dead ends: 9120 [2022-12-14 03:06:45,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:45,776 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:45,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 219 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2022-12-14 03:06:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 7317. [2022-12-14 03:06:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7317 states, 5964 states have (on average 1.266934942991281) internal successors, (7556), 5972 states have internal predecessors, (7556), 757 states have call successors, (757), 607 states have call predecessors, (757), 595 states have return successors, (793), 738 states have call predecessors, (793), 757 states have call successors, (793) [2022-12-14 03:06:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 9106 transitions. [2022-12-14 03:06:46,224 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 9106 transitions. Word has length 117 [2022-12-14 03:06:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:46,224 INFO L495 AbstractCegarLoop]: Abstraction has 7317 states and 9106 transitions. [2022-12-14 03:06:46,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 9106 transitions. [2022-12-14 03:06:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 03:06:46,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:46,234 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:46,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 03:06:46,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 03:06:46,435 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash -67098901, now seen corresponding path program 1 times [2022-12-14 03:06:46,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:46,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712314160] [2022-12-14 03:06:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:46,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 03:06:46,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712314160] [2022-12-14 03:06:46,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712314160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350607306] [2022-12-14 03:06:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:46,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:46,593 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:46,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 03:06:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 03:06:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:06:46,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:46,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350607306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:46,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:46,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 03:06:46,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545750280] [2022-12-14 03:06:46,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:06:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:06:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:46,759 INFO L87 Difference]: Start difference. First operand 7317 states and 9106 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 03:06:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:47,592 INFO L93 Difference]: Finished difference Result 14378 states and 17965 transitions. [2022-12-14 03:06:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:06:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 118 [2022-12-14 03:06:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:47,607 INFO L225 Difference]: With dead ends: 14378 [2022-12-14 03:06:47,607 INFO L226 Difference]: Without dead ends: 9372 [2022-12-14 03:06:47,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 03:06:47,613 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 190 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:47,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 446 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:06:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-12-14 03:06:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 8837. [2022-12-14 03:06:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 7184 states have (on average 1.257238307349666) internal successors, (9032), 7180 states have internal predecessors, (9032), 937 states have call successors, (937), 745 states have call predecessors, (937), 715 states have return successors, (991), 912 states have call predecessors, (991), 937 states have call successors, (991) [2022-12-14 03:06:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 10960 transitions. [2022-12-14 03:06:48,135 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 10960 transitions. Word has length 118 [2022-12-14 03:06:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:48,135 INFO L495 AbstractCegarLoop]: Abstraction has 8837 states and 10960 transitions. [2022-12-14 03:06:48,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 03:06:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 10960 transitions. [2022-12-14 03:06:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 03:06:48,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:48,141 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:48,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 03:06:48,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 03:06:48,342 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash -37250141, now seen corresponding path program 1 times [2022-12-14 03:06:48,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:48,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636895529] [2022-12-14 03:06:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:48,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 03:06:48,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636895529] [2022-12-14 03:06:48,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636895529] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403396590] [2022-12-14 03:06:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:48,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:48,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 03:06:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:06:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 03:06:48,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:06:48,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403396590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:48,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:06:48,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 03:06:48,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925927493] [2022-12-14 03:06:48,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:48,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:06:48,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:06:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:48,493 INFO L87 Difference]: Start difference. First operand 8837 states and 10960 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:49,100 INFO L93 Difference]: Finished difference Result 16289 states and 20390 transitions. [2022-12-14 03:06:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:06:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-12-14 03:06:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:49,116 INFO L225 Difference]: With dead ends: 16289 [2022-12-14 03:06:49,116 INFO L226 Difference]: Without dead ends: 10643 [2022-12-14 03:06:49,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:06:49,122 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 51 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:49,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 262 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:06:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2022-12-14 03:06:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 9689. [2022-12-14 03:06:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9689 states, 7908 states have (on average 1.2701062215477996) internal successors, (10044), 7904 states have internal predecessors, (10044), 1001 states have call successors, (1001), 809 states have call predecessors, (1001), 779 states have return successors, (1055), 976 states have call predecessors, (1055), 1001 states have call successors, (1055) [2022-12-14 03:06:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 12100 transitions. [2022-12-14 03:06:49,836 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 12100 transitions. Word has length 113 [2022-12-14 03:06:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:49,836 INFO L495 AbstractCegarLoop]: Abstraction has 9689 states and 12100 transitions. [2022-12-14 03:06:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:06:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 12100 transitions. [2022-12-14 03:06:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 03:06:49,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:49,842 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:49,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 03:06:50,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:50,043 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash 383174667, now seen corresponding path program 1 times [2022-12-14 03:06:50,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953848657] [2022-12-14 03:06:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 03:06:50,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:50,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953848657] [2022-12-14 03:06:50,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953848657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:50,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:50,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 03:06:50,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916846375] [2022-12-14 03:06:50,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:50,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 03:06:50,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:50,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 03:06:50,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-14 03:06:50,312 INFO L87 Difference]: Start difference. First operand 9689 states and 12100 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 03:06:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:52,037 INFO L93 Difference]: Finished difference Result 21685 states and 27606 transitions. [2022-12-14 03:06:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 03:06:52,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 113 [2022-12-14 03:06:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:52,060 INFO L225 Difference]: With dead ends: 21685 [2022-12-14 03:06:52,060 INFO L226 Difference]: Without dead ends: 16784 [2022-12-14 03:06:52,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-12-14 03:06:52,067 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 661 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:52,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 383 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:06:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16784 states. [2022-12-14 03:06:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16784 to 13786. [2022-12-14 03:06:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13786 states, 11345 states have (on average 1.25165271044513) internal successors, (14200), 11374 states have internal predecessors, (14200), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1109 states have return successors, (1439), 1306 states have call predecessors, (1439), 1331 states have call successors, (1439) [2022-12-14 03:06:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13786 states to 13786 states and 16970 transitions. [2022-12-14 03:06:53,020 INFO L78 Accepts]: Start accepts. Automaton has 13786 states and 16970 transitions. Word has length 113 [2022-12-14 03:06:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:53,021 INFO L495 AbstractCegarLoop]: Abstraction has 13786 states and 16970 transitions. [2022-12-14 03:06:53,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 03:06:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 13786 states and 16970 transitions. [2022-12-14 03:06:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 03:06:53,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:53,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 03:06:53,027 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1388296308, now seen corresponding path program 1 times [2022-12-14 03:06:53,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111111624] [2022-12-14 03:06:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 03:06:53,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:53,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111111624] [2022-12-14 03:06:53,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111111624] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:53,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:53,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:06:53,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648244877] [2022-12-14 03:06:53,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:53,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:06:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:53,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:06:53,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:06:53,068 INFO L87 Difference]: Start difference. First operand 13786 states and 16970 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:54,328 INFO L93 Difference]: Finished difference Result 19194 states and 23912 transitions. [2022-12-14 03:06:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:06:54,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-12-14 03:06:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:54,351 INFO L225 Difference]: With dead ends: 19194 [2022-12-14 03:06:54,351 INFO L226 Difference]: Without dead ends: 13654 [2022-12-14 03:06:54,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:06:54,360 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 201 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:54,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:06:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13654 states. [2022-12-14 03:06:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13654 to 13630. [2022-12-14 03:06:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13630 states, 11198 states have (on average 1.2407572780853724) internal successors, (13894), 11218 states have internal predecessors, (13894), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1100 states have return successors, (1430), 1306 states have call predecessors, (1430), 1331 states have call successors, (1430) [2022-12-14 03:06:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13630 states to 13630 states and 16655 transitions. [2022-12-14 03:06:55,318 INFO L78 Accepts]: Start accepts. Automaton has 13630 states and 16655 transitions. Word has length 113 [2022-12-14 03:06:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:55,318 INFO L495 AbstractCegarLoop]: Abstraction has 13630 states and 16655 transitions. [2022-12-14 03:06:55,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13630 states and 16655 transitions. [2022-12-14 03:06:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 03:06:55,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:55,324 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:55,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 03:06:55,324 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1504163519, now seen corresponding path program 1 times [2022-12-14 03:06:55,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132027134] [2022-12-14 03:06:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:55,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 03:06:55,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132027134] [2022-12-14 03:06:55,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132027134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:06:55,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:06:55,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:06:55,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202983971] [2022-12-14 03:06:55,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:06:55,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:06:55,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:06:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:06:55,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:06:55,429 INFO L87 Difference]: Start difference. First operand 13630 states and 16655 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:06:57,039 INFO L93 Difference]: Finished difference Result 22966 states and 28070 transitions. [2022-12-14 03:06:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 03:06:57,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2022-12-14 03:06:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:06:57,069 INFO L225 Difference]: With dead ends: 22966 [2022-12-14 03:06:57,070 INFO L226 Difference]: Without dead ends: 17582 [2022-12-14 03:06:57,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:06:57,078 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 93 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:06:57,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 420 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:06:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2022-12-14 03:06:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 17049. [2022-12-14 03:06:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17049 states, 13907 states have (on average 1.2295966060257424) internal successors, (17100), 13969 states have internal predecessors, (17100), 1725 states have call successors, (1725), 1416 states have call predecessors, (1725), 1416 states have return successors, (1932), 1664 states have call predecessors, (1932), 1725 states have call successors, (1932) [2022-12-14 03:06:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17049 states to 17049 states and 20757 transitions. [2022-12-14 03:06:58,386 INFO L78 Accepts]: Start accepts. Automaton has 17049 states and 20757 transitions. Word has length 114 [2022-12-14 03:06:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:06:58,386 INFO L495 AbstractCegarLoop]: Abstraction has 17049 states and 20757 transitions. [2022-12-14 03:06:58,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 03:06:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17049 states and 20757 transitions. [2022-12-14 03:06:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 03:06:58,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:06:58,393 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:06:58,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 03:06:58,393 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:06:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:06:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1991779207, now seen corresponding path program 1 times [2022-12-14 03:06:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:06:58,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318723258] [2022-12-14 03:06:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:06:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 03:06:58,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:06:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318723258] [2022-12-14 03:06:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318723258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:06:58,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700830316] [2022-12-14 03:06:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:06:58,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:06:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:06:58,625 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:06:58,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 03:06:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:06:58,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 03:06:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:06:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:06:58,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:06:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 03:06:59,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700830316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:06:59,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587231405] [2022-12-14 03:06:59,035 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-12-14 03:06:59,035 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:06:59,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:06:59,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:06:59,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:07:04,151 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-12-14 03:07:09,784 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-12-14 03:07:16,417 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-12-14 03:07:16,441 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-12-14 03:07:16,451 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-12-14 03:07:16,693 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-12-14 03:07:17,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:07:27,404 WARN L233 SmtUtils]: Spent 9.44s on a formula simplification. DAG size of input: 520 DAG size of output: 474 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:07:36,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '481966#(and (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 03:07:36,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:07:36,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:07:36,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 19 [2022-12-14 03:07:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493096324] [2022-12-14 03:07:36,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:07:36,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 03:07:36,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:07:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 03:07:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=4025, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 03:07:36,863 INFO L87 Difference]: Start difference. First operand 17049 states and 20757 transitions. Second operand has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 03:07:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:07:42,370 INFO L93 Difference]: Finished difference Result 32959 states and 40894 transitions. [2022-12-14 03:07:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-12-14 03:07:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 119 [2022-12-14 03:07:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:07:42,394 INFO L225 Difference]: With dead ends: 32959 [2022-12-14 03:07:42,394 INFO L226 Difference]: Without dead ends: 15872 [2022-12-14 03:07:42,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20551 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=3303, Invalid=43137, Unknown=0, NotChecked=0, Total=46440 [2022-12-14 03:07:42,422 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 2401 mSDsluCounter, 2261 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 4133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 03:07:42,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2420 Valid, 2524 Invalid, 4133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 03:07:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15872 states. [2022-12-14 03:07:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15872 to 10598. [2022-12-14 03:07:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10598 states, 8672 states have (on average 1.2257841328413284) internal successors, (10630), 8703 states have internal predecessors, (10630), 1024 states have call successors, (1024), 901 states have call predecessors, (1024), 901 states have return successors, (1093), 993 states have call predecessors, (1093), 1024 states have call successors, (1093) [2022-12-14 03:07:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10598 states to 10598 states and 12747 transitions. [2022-12-14 03:07:43,351 INFO L78 Accepts]: Start accepts. Automaton has 10598 states and 12747 transitions. Word has length 119 [2022-12-14 03:07:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:07:43,351 INFO L495 AbstractCegarLoop]: Abstraction has 10598 states and 12747 transitions. [2022-12-14 03:07:43,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 03:07:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 10598 states and 12747 transitions. [2022-12-14 03:07:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 03:07:43,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:07:43,356 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:07:43,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 03:07:43,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:07:43,556 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:07:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:07:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978862, now seen corresponding path program 1 times [2022-12-14 03:07:43,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:07:43,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627221720] [2022-12-14 03:07:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:07:43,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:07:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:07:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 03:07:43,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:07:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627221720] [2022-12-14 03:07:43,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627221720] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:07:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58924026] [2022-12-14 03:07:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:07:43,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:07:43,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:07:43,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:07:43,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 03:07:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:07:43,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 03:07:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:07:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:07:44,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:07:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 03:07:44,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58924026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:07:44,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836474420] [2022-12-14 03:07:44,249 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 03:07:44,249 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:07:44,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:07:44,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:07:44,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:07:47,051 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-12-14 03:07:56,088 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-12-14 03:08:00,129 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-12-14 03:08:00,152 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-12-14 03:08:00,162 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-12-14 03:08:00,197 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-12-14 03:08:00,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:08:14,317 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 446 DAG size of output: 301 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:08:19,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '542726#(and (= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= |ULTIMATE.start_eval_~tmp_ndt_4~0#1| 0) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= 0 ~t2_st~0) (= ~t3_i~0 1) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= |ULTIMATE.start_eval_~tmp_ndt_3~0#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 03:08:19,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:08:19,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:08:19,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 21 [2022-12-14 03:08:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912785229] [2022-12-14 03:08:19,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:08:19,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 03:08:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 03:08:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=4457, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 03:08:19,561 INFO L87 Difference]: Start difference. First operand 10598 states and 12747 transitions. Second operand has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 03:08:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:24,532 INFO L93 Difference]: Finished difference Result 22368 states and 27290 transitions. [2022-12-14 03:08:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-12-14 03:08:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 122 [2022-12-14 03:08:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:24,549 INFO L225 Difference]: With dead ends: 22368 [2022-12-14 03:08:24,549 INFO L226 Difference]: Without dead ends: 12617 [2022-12-14 03:08:24,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18670 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=3082, Invalid=39974, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 03:08:24,563 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1358 mSDsluCounter, 2475 mSDsCounter, 0 mSdLazyCounter, 3183 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 3183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:24,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 2733 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 3183 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 03:08:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2022-12-14 03:08:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 7424. [2022-12-14 03:08:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 6156 states have (on average 1.2376543209876543) internal successors, (7619), 6167 states have internal predecessors, (7619), 656 states have call successors, (656), 615 states have call predecessors, (656), 611 states have return successors, (679), 641 states have call predecessors, (679), 656 states have call successors, (679) [2022-12-14 03:08:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 8954 transitions. [2022-12-14 03:08:25,229 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 8954 transitions. Word has length 122 [2022-12-14 03:08:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:25,229 INFO L495 AbstractCegarLoop]: Abstraction has 7424 states and 8954 transitions. [2022-12-14 03:08:25,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 03:08:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 8954 transitions. [2022-12-14 03:08:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 03:08:25,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:25,232 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:25,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 03:08:25,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 03:08:25,433 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:25,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1814727541, now seen corresponding path program 1 times [2022-12-14 03:08:25,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:25,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2539135] [2022-12-14 03:08:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:25,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 03:08:25,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:25,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2539135] [2022-12-14 03:08:25,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2539135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:25,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669526215] [2022-12-14 03:08:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:25,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:25,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:25,570 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:25,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 03:08:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 03:08:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:08:25,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:08:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 03:08:25,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669526215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:08:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520303276] [2022-12-14 03:08:25,990 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-12-14 03:08:25,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:08:25,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:08:25,991 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:08:25,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:08:28,876 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-12-14 03:09:23,743 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-12-14 03:09:27,239 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-12-14 03:09:27,262 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-12-14 03:09:27,272 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 50 for LOIs [2022-12-14 03:09:27,321 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-12-14 03:09:27,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:58,868 WARN L233 SmtUtils]: Spent 22.38s on a formula simplification. DAG size of input: 1582 DAG size of output: 1055 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:10:06,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '584159#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 03:10:06,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:10:06,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:10:06,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 18 [2022-12-14 03:10:06,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349162747] [2022-12-14 03:10:06,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:10:06,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 03:10:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:06,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 03:10:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=4822, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 03:10:06,337 INFO L87 Difference]: Start difference. First operand 7424 states and 8954 transitions. Second operand has 18 states, 15 states have (on average 8.666666666666666) internal successors, (130), 16 states have internal predecessors, (130), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 03:10:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:12,205 INFO L93 Difference]: Finished difference Result 19758 states and 24362 transitions. [2022-12-14 03:10:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-12-14 03:10:12,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 8.666666666666666) internal successors, (130), 16 states have internal predecessors, (130), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 124 [2022-12-14 03:10:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:12,221 INFO L225 Difference]: With dead ends: 19758 [2022-12-14 03:10:12,222 INFO L226 Difference]: Without dead ends: 12886 [2022-12-14 03:10:12,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 396 SyntacticMatches, 5 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38258 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=5987, Invalid=78403, Unknown=0, NotChecked=0, Total=84390 [2022-12-14 03:10:12,231 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1230 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 3224 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:12,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 3224 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 03:10:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12886 states. [2022-12-14 03:10:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12886 to 9215. [2022-12-14 03:10:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9215 states, 7635 states have (on average 1.2145383104125738) internal successors, (9273), 7654 states have internal predecessors, (9273), 808 states have call successors, (808), 764 states have call predecessors, (808), 771 states have return successors, (989), 796 states have call predecessors, (989), 808 states have call successors, (989) [2022-12-14 03:10:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9215 states to 9215 states and 11070 transitions. [2022-12-14 03:10:13,109 INFO L78 Accepts]: Start accepts. Automaton has 9215 states and 11070 transitions. Word has length 124 [2022-12-14 03:10:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:13,110 INFO L495 AbstractCegarLoop]: Abstraction has 9215 states and 11070 transitions. [2022-12-14 03:10:13,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 8.666666666666666) internal successors, (130), 16 states have internal predecessors, (130), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 03:10:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 9215 states and 11070 transitions. [2022-12-14 03:10:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 03:10:13,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:13,114 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:13,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 03:10:13,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 03:10:13,315 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1923279617, now seen corresponding path program 1 times [2022-12-14 03:10:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77448943] [2022-12-14 03:10:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:13,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 03:10:13,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77448943] [2022-12-14 03:10:13,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77448943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881787356] [2022-12-14 03:10:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:13,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:13,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:13,763 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:13,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 03:10:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 03:10:13,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 03:10:14,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:10:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 03:10:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881787356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:10:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700061960] [2022-12-14 03:10:14,703 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2022-12-14 03:10:14,703 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:10:14,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:10:14,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:10:14,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:10:18,867 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 60 for LOIs [2022-12-14 03:10:18,882 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 85 for LOIs [2022-12-14 03:10:18,900 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2022-12-14 03:10:18,907 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 39 for LOIs [2022-12-14 03:10:18,915 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 51 for LOIs [2022-12-14 03:10:18,967 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-12-14 03:10:19,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:10:30,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624596#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (<= 1 ~m_i~0) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (<= ~m_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 03:10:30,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:10:30,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:10:30,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-12-14 03:10:30,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141155040] [2022-12-14 03:10:30,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:10:30,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 03:10:30,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:30,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 03:10:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=8273, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 03:10:30,111 INFO L87 Difference]: Start difference. First operand 9215 states and 11070 transitions. Second operand has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-12-14 03:10:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:35,714 INFO L93 Difference]: Finished difference Result 20533 states and 24805 transitions. [2022-12-14 03:10:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 03:10:35,714 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 126 [2022-12-14 03:10:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:35,731 INFO L225 Difference]: With dead ends: 20533 [2022-12-14 03:10:35,731 INFO L226 Difference]: Without dead ends: 13676 [2022-12-14 03:10:35,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 305 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10934 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2575, Invalid=23185, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 03:10:35,742 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 5043 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 3303 mSolverCounterSat, 2205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5043 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 5508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2205 IncrementalHoareTripleChecker+Valid, 3303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:35,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5043 Valid, 1008 Invalid, 5508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2205 Valid, 3303 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 03:10:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2022-12-14 03:10:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9015. [2022-12-14 03:10:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 7436 states have (on average 1.2149004841312534) internal successors, (9034), 7460 states have internal predecessors, (9034), 811 states have call successors, (811), 755 states have call predecessors, (811), 767 states have return successors, (943), 799 states have call predecessors, (943), 811 states have call successors, (943) [2022-12-14 03:10:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 10788 transitions. [2022-12-14 03:10:36,940 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 10788 transitions. Word has length 126 [2022-12-14 03:10:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:36,940 INFO L495 AbstractCegarLoop]: Abstraction has 9015 states and 10788 transitions. [2022-12-14 03:10:36,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-12-14 03:10:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 10788 transitions. [2022-12-14 03:10:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 03:10:36,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:36,943 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:36,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 03:10:37,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:37,144 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash -543746450, now seen corresponding path program 1 times [2022-12-14 03:10:37,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:37,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024814209] [2022-12-14 03:10:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 03:10:37,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024814209] [2022-12-14 03:10:37,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024814209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592819011] [2022-12-14 03:10:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:37,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:37,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:37,231 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:37,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 03:10:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 03:10:37,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 03:10:37,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:10:37,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592819011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:37,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:10:37,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 03:10:37,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017865800] [2022-12-14 03:10:37,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:37,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:10:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:10:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:10:37,341 INFO L87 Difference]: Start difference. First operand 9015 states and 10788 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:10:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:38,452 INFO L93 Difference]: Finished difference Result 17828 states and 21426 transitions. [2022-12-14 03:10:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:10:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 140 [2022-12-14 03:10:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:38,464 INFO L225 Difference]: With dead ends: 17828 [2022-12-14 03:10:38,465 INFO L226 Difference]: Without dead ends: 9492 [2022-12-14 03:10:38,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:10:38,471 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 77 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:38,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 149 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:10:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9492 states. [2022-12-14 03:10:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9492 to 9279. [2022-12-14 03:10:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 7684 states have (on average 1.2014575741801146) internal successors, (9232), 7708 states have internal predecessors, (9232), 811 states have call successors, (811), 771 states have call predecessors, (811), 783 states have return successors, (955), 799 states have call predecessors, (955), 811 states have call successors, (955) [2022-12-14 03:10:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 10998 transitions. [2022-12-14 03:10:39,529 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 10998 transitions. Word has length 140 [2022-12-14 03:10:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:39,529 INFO L495 AbstractCegarLoop]: Abstraction has 9279 states and 10998 transitions. [2022-12-14 03:10:39,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:10:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 10998 transitions. [2022-12-14 03:10:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 03:10:39,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:39,532 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:39,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 03:10:39,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:39,734 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1708225098, now seen corresponding path program 1 times [2022-12-14 03:10:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737250044] [2022-12-14 03:10:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:39,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 03:10:39,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737250044] [2022-12-14 03:10:39,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737250044] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494187359] [2022-12-14 03:10:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:39,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:39,802 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:39,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 03:10:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:10:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 03:10:39,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:10:39,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494187359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:39,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:10:39,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 03:10:39,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139101846] [2022-12-14 03:10:39,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:39,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:10:39,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:39,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:10:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:10:39,923 INFO L87 Difference]: Start difference. First operand 9279 states and 10998 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 03:10:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:40,667 INFO L93 Difference]: Finished difference Result 14007 states and 16793 transitions. [2022-12-14 03:10:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:10:40,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2022-12-14 03:10:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:40,675 INFO L225 Difference]: With dead ends: 14007 [2022-12-14 03:10:40,675 INFO L226 Difference]: Without dead ends: 5426 [2022-12-14 03:10:40,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:10:40,683 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:40,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 210 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:10:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2022-12-14 03:10:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5293. [2022-12-14 03:10:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 4374 states have (on average 1.1616369455875628) internal successors, (5081), 4385 states have internal predecessors, (5081), 469 states have call successors, (469), 449 states have call predecessors, (469), 449 states have return successors, (481), 458 states have call predecessors, (481), 469 states have call successors, (481) [2022-12-14 03:10:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 6031 transitions. [2022-12-14 03:10:41,294 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 6031 transitions. Word has length 141 [2022-12-14 03:10:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:41,294 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 6031 transitions. [2022-12-14 03:10:41,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 03:10:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 6031 transitions. [2022-12-14 03:10:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 03:10:41,296 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:41,296 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:41,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 03:10:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 03:10:41,498 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash 304383496, now seen corresponding path program 2 times [2022-12-14 03:10:41,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:41,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482393425] [2022-12-14 03:10:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 03:10:41,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482393425] [2022-12-14 03:10:41,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482393425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265636881] [2022-12-14 03:10:41,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:10:41,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:41,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:41,618 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:41,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 03:10:41,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 03:10:41,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:10:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 03:10:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 03:10:41,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:10:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265636881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:41,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:10:41,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 03:10:41,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134446564] [2022-12-14 03:10:41,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:10:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:10:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:10:41,738 INFO L87 Difference]: Start difference. First operand 5293 states and 6031 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 03:10:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:42,734 INFO L93 Difference]: Finished difference Result 11046 states and 12671 transitions. [2022-12-14 03:10:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:10:42,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 143 [2022-12-14 03:10:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:42,744 INFO L225 Difference]: With dead ends: 11046 [2022-12-14 03:10:42,744 INFO L226 Difference]: Without dead ends: 6563 [2022-12-14 03:10:42,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 03:10:42,748 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 209 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:42,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 400 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:10:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2022-12-14 03:10:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6026. [2022-12-14 03:10:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6026 states, 4927 states have (on average 1.148975035518571) internal successors, (5661), 4946 states have internal predecessors, (5661), 563 states have call successors, (563), 523 states have call predecessors, (563), 535 states have return successors, (625), 556 states have call predecessors, (625), 563 states have call successors, (625) [2022-12-14 03:10:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 6849 transitions. [2022-12-14 03:10:43,475 INFO L78 Accepts]: Start accepts. Automaton has 6026 states and 6849 transitions. Word has length 143 [2022-12-14 03:10:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:43,475 INFO L495 AbstractCegarLoop]: Abstraction has 6026 states and 6849 transitions. [2022-12-14 03:10:43,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 03:10:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6026 states and 6849 transitions. [2022-12-14 03:10:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 03:10:43,478 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:43,478 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:43,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 03:10:43,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 03:10:43,679 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:43,680 INFO L85 PathProgramCache]: Analyzing trace with hash -969054240, now seen corresponding path program 1 times [2022-12-14 03:10:43,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215505326] [2022-12-14 03:10:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:43,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-12-14 03:10:43,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:43,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215505326] [2022-12-14 03:10:43,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215505326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:43,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:10:43,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 03:10:43,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25210831] [2022-12-14 03:10:43,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:43,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:10:43,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:43,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:10:43,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:10:43,834 INFO L87 Difference]: Start difference. First operand 6026 states and 6849 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 03:10:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:46,262 INFO L93 Difference]: Finished difference Result 19265 states and 22048 transitions. [2022-12-14 03:10:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:10:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 172 [2022-12-14 03:10:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:46,282 INFO L225 Difference]: With dead ends: 19265 [2022-12-14 03:10:46,282 INFO L226 Difference]: Without dead ends: 16698 [2022-12-14 03:10:46,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:10:46,287 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 364 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:46,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1105 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:10:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2022-12-14 03:10:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10446. [2022-12-14 03:10:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10446 states, 8485 states have (on average 1.1461402474955804) internal successors, (9725), 8515 states have internal predecessors, (9725), 1018 states have call successors, (1018), 923 states have call predecessors, (1018), 942 states have return successors, (1136), 1007 states have call predecessors, (1136), 1018 states have call successors, (1136) [2022-12-14 03:10:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10446 states to 10446 states and 11879 transitions. [2022-12-14 03:10:47,725 INFO L78 Accepts]: Start accepts. Automaton has 10446 states and 11879 transitions. Word has length 172 [2022-12-14 03:10:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:47,726 INFO L495 AbstractCegarLoop]: Abstraction has 10446 states and 11879 transitions. [2022-12-14 03:10:47,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 03:10:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10446 states and 11879 transitions. [2022-12-14 03:10:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-14 03:10:47,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:47,730 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:47,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 03:10:47,730 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:47,731 INFO L85 PathProgramCache]: Analyzing trace with hash 465082559, now seen corresponding path program 1 times [2022-12-14 03:10:47,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:47,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182746090] [2022-12-14 03:10:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-12-14 03:10:48,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:48,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182746090] [2022-12-14 03:10:48,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182746090] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:48,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355047726] [2022-12-14 03:10:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:48,155 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:48,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9126114c-7801-4939-bfee-f24860689cd7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 03:10:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:48,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 03:10:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 03:10:48,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:10:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-12-14 03:10:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355047726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:10:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258944100] [2022-12-14 03:10:48,599 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-12-14 03:10:48,599 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:10:48,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:10:48,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:10:48,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs