./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/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_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/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_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/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 5ab060d6e8ec67586454a3fd3cad3b6749e261734a1b9e4129e037a184a704d9 --- 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 08:09:32,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:09:32,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:09:32,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:09:32,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:09:32,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:09:32,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:09:32,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:09:32,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:09:32,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:09:32,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:09:32,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:09:32,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:09:32,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:09:32,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:09:32,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:09:32,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:09:32,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:09:32,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:09:32,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:09:32,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:09:32,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:09:32,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:09:32,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:09:32,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:09:32,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:09:32,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:09:32,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:09:32,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:09:32,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:09:32,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:09:32,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:09:32,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:09:32,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:09:32,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:09:32,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:09:32,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:09:32,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:09:32,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:09:32,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:09:32,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:09:32,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:09:32,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:09:32,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:09:32,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:09:32,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:09:32,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:09:32,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:09:32,632 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:09:32,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:09:32,632 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:09:32,633 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:09:32,633 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:09:32,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:09:32,633 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:09:32,633 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:09:32,634 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:09:32,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:09:32,634 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:09:32,634 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:09:32,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:09:32,635 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:09:32,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:09:32,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:09:32,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:09:32,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:09:32,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:09:32,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:09:32,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:09:32,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:09:32,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:09:32,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:09:32,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:09:32,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:09:32,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:09:32,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:09:32,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:09:32,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:09:32,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:09:32,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:09:32,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:09:32,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:09:32,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:09:32,639 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_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ab060d6e8ec67586454a3fd3cad3b6749e261734a1b9e4129e037a184a704d9 [2022-12-14 08:09:32,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:09:32,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:09:32,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:09:32,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:09:32,841 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:09:32,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c [2022-12-14 08:09:35,547 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:09:36,135 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:09:36,135 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c [2022-12-14 08:09:36,173 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/data/9a8a52bd2/79feb319143a4424b7cfd1970b579ad6/FLAG74b816f9e [2022-12-14 08:09:36,183 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/data/9a8a52bd2/79feb319143a4424b7cfd1970b579ad6 [2022-12-14 08:09:36,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:09:36,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:09:36,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:09:36,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:09:36,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:09:36,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:09:36" (1/1) ... [2022-12-14 08:09:36,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd6e955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:36, skipping insertion in model container [2022-12-14 08:09:36,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:09:36" (1/1) ... [2022-12-14 08:09:36,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:09:36,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:09:37,704 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_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c[381679,381692] [2022-12-14 08:09:37,723 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_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c[383339,383352] [2022-12-14 08:09:37,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:09:37,925 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:09:38,782 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_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c[381679,381692] [2022-12-14 08:09:38,784 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_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-2.c[383339,383352] [2022-12-14 08:09:38,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:09:38,830 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:09:38,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38 WrapperNode [2022-12-14 08:09:38,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:09:38,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:09:38,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:09:38,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:09:38,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:38,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,229 INFO L138 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 13030 [2022-12-14 08:09:39,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:09:39,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:09:39,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:09:39,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:09:39,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,583 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:09:39,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:09:39,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:09:39,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:09:39,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (1/1) ... [2022-12-14 08:09:39,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:09:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:39,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:09:39,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:09:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:09:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 08:09:39,693 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 08:09:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 08:09:39,693 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 08:09:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 08:09:39,693 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 08:09:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 08:09:39,693 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 08:09:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 08:09:39,693 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 08:09:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 08:09:39,694 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 08:09:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 08:09:39,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 08:09:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:09:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:09:39,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:09:39,787 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:09:39,789 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:09:45,201 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:09:46,700 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:09:46,700 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 08:09:46,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:09:46 BoogieIcfgContainer [2022-12-14 08:09:46,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:09:46,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:09:46,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:09:46,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:09:46,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:09:36" (1/3) ... [2022-12-14 08:09:46,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c42d235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:09:46, skipping insertion in model container [2022-12-14 08:09:46,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:38" (2/3) ... [2022-12-14 08:09:46,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c42d235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:09:46, skipping insertion in model container [2022-12-14 08:09:46,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:09:46" (3/3) ... [2022-12-14 08:09:46,712 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.09.cil-2.c [2022-12-14 08:09:46,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:09:46,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 08:09:46,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:09:46,805 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;@2407501d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:09:46,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 08:09:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 08:09:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 08:09:46,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:46,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:46,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 222618620, now seen corresponding path program 1 times [2022-12-14 08:09:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648752565] [2022-12-14 08:09:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:47,224 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 08:09:47,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648752565] [2022-12-14 08:09:47,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648752565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:47,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:47,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:09:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492254302] [2022-12-14 08:09:47,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:09:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:09:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:09:47,264 INFO L87 Difference]: Start difference. First operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:09:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:48,064 INFO L93 Difference]: Finished difference Result 3745 states and 7279 transitions. [2022-12-14 08:09:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:09:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-12-14 08:09:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:48,087 INFO L225 Difference]: With dead ends: 3745 [2022-12-14 08:09:48,087 INFO L226 Difference]: Without dead ends: 1940 [2022-12-14 08:09:48,094 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 08:09:48,097 INFO L413 NwaCegarLoop]: 3428 mSDtfsCounter, 3688 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3688 SdHoareTripleChecker+Valid, 6768 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:48,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3688 Valid, 6768 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:09:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-12-14 08:09:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1939. [2022-12-14 08:09:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1881 states have (on average 1.9298245614035088) internal successors, (3630), 1885 states have internal predecessors, (3630), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 08:09:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3716 transitions. [2022-12-14 08:09:48,203 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3716 transitions. Word has length 59 [2022-12-14 08:09:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:48,203 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 3716 transitions. [2022-12-14 08:09:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:09:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3716 transitions. [2022-12-14 08:09:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:09:48,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:48,207 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, 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] [2022-12-14 08:09:48,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:09:48,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash -995734557, now seen corresponding path program 1 times [2022-12-14 08:09:48,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:48,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630184072] [2022-12-14 08:09:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:48,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:09:48,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630184072] [2022-12-14 08:09:48,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630184072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:48,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475943118] [2022-12-14 08:09:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:48,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:48,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:48,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:48,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:09:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:09:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:09:48,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:48,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475943118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:48,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:48,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:09:48,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150501314] [2022-12-14 08:09:48,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:48,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:48,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:48,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:48,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:09:48,597 INFO L87 Difference]: Start difference. First operand 1939 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:49,000 INFO L93 Difference]: Finished difference Result 2518 states and 4609 transitions. [2022-12-14 08:09:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 08:09:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:49,009 INFO L225 Difference]: With dead ends: 2518 [2022-12-14 08:09:49,009 INFO L226 Difference]: Without dead ends: 2225 [2022-12-14 08:09:49,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 08:09:49,012 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3461 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:49,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3493 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-12-14 08:09:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2219. [2022-12-14 08:09:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2113 states have (on average 1.882158069096072) internal successors, (3977), 2118 states have internal predecessors, (3977), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 08:09:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 4135 transitions. [2022-12-14 08:09:49,072 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 4135 transitions. Word has length 116 [2022-12-14 08:09:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:49,072 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 4135 transitions. [2022-12-14 08:09:49,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 4135 transitions. [2022-12-14 08:09:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:09:49,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:49,077 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, 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] [2022-12-14 08:09:49,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:09:49,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 08:09:49,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1964935841, now seen corresponding path program 1 times [2022-12-14 08:09:49,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:49,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406410393] [2022-12-14 08:09:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:49,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:09:49,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406410393] [2022-12-14 08:09:49,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406410393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:49,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850609314] [2022-12-14 08:09:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:49,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:49,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:09:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:49,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:09:49,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:09:49,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:49,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850609314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:49,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:49,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:09:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127900317] [2022-12-14 08:09:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:49,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:09:49,606 INFO L87 Difference]: Start difference. First operand 2219 states and 4135 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:49,992 INFO L93 Difference]: Finished difference Result 3352 states and 5878 transitions. [2022-12-14 08:09:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:49,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 08:09:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:50,005 INFO L225 Difference]: With dead ends: 3352 [2022-12-14 08:09:50,005 INFO L226 Difference]: Without dead ends: 2779 [2022-12-14 08:09:50,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 08:09:50,010 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 3473 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:50,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 3492 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2022-12-14 08:09:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2771. [2022-12-14 08:09:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2571 states have (on average 1.8121353558926487) internal successors, (4659), 2578 states have internal predecessors, (4659), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 08:09:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4957 transitions. [2022-12-14 08:09:50,113 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4957 transitions. Word has length 116 [2022-12-14 08:09:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:50,113 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 4957 transitions. [2022-12-14 08:09:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4957 transitions. [2022-12-14 08:09:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:09:50,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:50,119 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, 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] [2022-12-14 08:09:50,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:09:50,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:50,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -228025249, now seen corresponding path program 1 times [2022-12-14 08:09:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036371154] [2022-12-14 08:09:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:50,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:09:50,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:50,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036371154] [2022-12-14 08:09:50,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036371154] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:50,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582567835] [2022-12-14 08:09:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:50,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:50,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:50,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:50,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:09:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:50,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:09:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:09:50,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:50,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582567835] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:50,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:50,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:09:50,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602777216] [2022-12-14 08:09:50,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:50,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:50,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:50,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:50,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:09:50,726 INFO L87 Difference]: Start difference. First operand 2771 states and 4957 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:51,171 INFO L93 Difference]: Finished difference Result 4996 states and 8366 transitions. [2022-12-14 08:09:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 08:09:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:51,187 INFO L225 Difference]: With dead ends: 4996 [2022-12-14 08:09:51,187 INFO L226 Difference]: Without dead ends: 3871 [2022-12-14 08:09:51,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 08:09:51,193 INFO L413 NwaCegarLoop]: 3293 mSDtfsCounter, 3479 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3480 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:51,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3479 Valid, 3480 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2022-12-14 08:09:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3859. [2022-12-14 08:09:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3475 states have (on average 1.7263309352517986) internal successors, (5999), 3486 states have internal predecessors, (5999), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-12-14 08:09:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 6569 transitions. [2022-12-14 08:09:51,329 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 6569 transitions. Word has length 116 [2022-12-14 08:09:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:51,330 INFO L495 AbstractCegarLoop]: Abstraction has 3859 states and 6569 transitions. [2022-12-14 08:09:51,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 6569 transitions. [2022-12-14 08:09:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:09:51,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:51,336 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, 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] [2022-12-14 08:09:51,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:09:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:51,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1560405917, now seen corresponding path program 1 times [2022-12-14 08:09:51,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:51,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573525249] [2022-12-14 08:09:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:51,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:09:51,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573525249] [2022-12-14 08:09:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573525249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261413891] [2022-12-14 08:09:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:51,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:51,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:51,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:09:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:09:51,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 08:09:51,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:51,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261413891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:51,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:51,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:09:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941101468] [2022-12-14 08:09:51,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:51,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:51,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:51,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:09:51,817 INFO L87 Difference]: Start difference. First operand 3859 states and 6569 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:52,261 INFO L93 Difference]: Finished difference Result 8236 states and 13242 transitions. [2022-12-14 08:09:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:52,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 08:09:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:52,302 INFO L225 Difference]: With dead ends: 8236 [2022-12-14 08:09:52,302 INFO L226 Difference]: Without dead ends: 6023 [2022-12-14 08:09:52,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 08:09:52,316 INFO L413 NwaCegarLoop]: 3303 mSDtfsCounter, 3482 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3490 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:52,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 3490 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6023 states. [2022-12-14 08:09:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6023 to 6003. [2022-12-14 08:09:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 5259 states have (on average 1.641186537364518) internal successors, (8631), 5278 states have internal predecessors, (8631), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-12-14 08:09:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 9729 transitions. [2022-12-14 08:09:52,513 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 9729 transitions. Word has length 116 [2022-12-14 08:09:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:52,513 INFO L495 AbstractCegarLoop]: Abstraction has 6003 states and 9729 transitions. [2022-12-14 08:09:52,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 9729 transitions. [2022-12-14 08:09:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:09:52,521 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:52,521 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, 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] [2022-12-14 08:09:52,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:09:52,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:52,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1643965343, now seen corresponding path program 1 times [2022-12-14 08:09:52,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:52,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42913118] [2022-12-14 08:09:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:09:52,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42913118] [2022-12-14 08:09:52,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42913118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777307677] [2022-12-14 08:09:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:52,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:52,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:52,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:09:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:09:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:09:53,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:53,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777307677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:53,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:53,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:09:53,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033892629] [2022-12-14 08:09:53,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:53,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:53,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:09:53,055 INFO L87 Difference]: Start difference. First operand 6003 states and 9729 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:53,585 INFO L93 Difference]: Finished difference Result 14620 states and 22794 transitions. [2022-12-14 08:09:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 08:09:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:53,612 INFO L225 Difference]: With dead ends: 14620 [2022-12-14 08:09:53,612 INFO L226 Difference]: Without dead ends: 10263 [2022-12-14 08:09:53,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 08:09:53,623 INFO L413 NwaCegarLoop]: 3269 mSDtfsCounter, 3467 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3467 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:53,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3467 Valid, 3456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2022-12-14 08:09:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 10227. [2022-12-14 08:09:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10227 states, 8779 states have (on average 1.5718191137942819) internal successors, (13799), 8814 states have internal predecessors, (13799), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-12-14 08:09:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10227 states to 10227 states and 15921 transitions. [2022-12-14 08:09:53,860 INFO L78 Accepts]: Start accepts. Automaton has 10227 states and 15921 transitions. Word has length 116 [2022-12-14 08:09:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:53,860 INFO L495 AbstractCegarLoop]: Abstraction has 10227 states and 15921 transitions. [2022-12-14 08:09:53,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:09:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10227 states and 15921 transitions. [2022-12-14 08:09:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:09:53,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:53,870 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, 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] [2022-12-14 08:09:53,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:09:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:54,071 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash -575757347, now seen corresponding path program 1 times [2022-12-14 08:09:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507105603] [2022-12-14 08:09:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 08:09:54,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:54,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507105603] [2022-12-14 08:09:54,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507105603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:54,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:54,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:09:54,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469152282] [2022-12-14 08:09:54,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:54,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:54,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:54,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:54,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:54,192 INFO L87 Difference]: Start difference. First operand 10227 states and 15921 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:09:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:54,786 INFO L93 Difference]: Finished difference Result 16919 states and 26164 transitions. [2022-12-14 08:09:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2022-12-14 08:09:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:54,835 INFO L225 Difference]: With dead ends: 16919 [2022-12-14 08:09:54,835 INFO L226 Difference]: Without dead ends: 12499 [2022-12-14 08:09:54,849 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 08:09:54,850 INFO L413 NwaCegarLoop]: 3355 mSDtfsCounter, 100 mSDsluCounter, 3261 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:54,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6616 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2022-12-14 08:09:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 11811. [2022-12-14 08:09:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11811 states, 10299 states have (on average 1.5946208369744634) internal successors, (16423), 10334 states have internal predecessors, (16423), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 08:09:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11811 states to 11811 states and 18609 transitions. [2022-12-14 08:09:55,166 INFO L78 Accepts]: Start accepts. Automaton has 11811 states and 18609 transitions. Word has length 116 [2022-12-14 08:09:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:55,167 INFO L495 AbstractCegarLoop]: Abstraction has 11811 states and 18609 transitions. [2022-12-14 08:09:55,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:09:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11811 states and 18609 transitions. [2022-12-14 08:09:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 08:09:55,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:55,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:55,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:09:55,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:55,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1778416498, now seen corresponding path program 1 times [2022-12-14 08:09:55,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:55,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138150923] [2022-12-14 08:09:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:55,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 08:09:55,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138150923] [2022-12-14 08:09:55,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138150923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:55,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:55,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:09:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553209772] [2022-12-14 08:09:55,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:55,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:55,247 INFO L87 Difference]: Start difference. First operand 11811 states and 18609 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:09:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:56,082 INFO L93 Difference]: Finished difference Result 31852 states and 49370 transitions. [2022-12-14 08:09:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 08:09:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:56,132 INFO L225 Difference]: With dead ends: 31852 [2022-12-14 08:09:56,132 INFO L226 Difference]: Without dead ends: 21687 [2022-12-14 08:09:56,152 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 08:09:56,152 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3469 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:56,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3469 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21687 states. [2022-12-14 08:09:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21687 to 21587. [2022-12-14 08:09:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21587 states, 18635 states have (on average 1.5527233700026832) internal successors, (28935), 18702 states have internal predecessors, (28935), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-12-14 08:09:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21587 states to 21587 states and 33169 transitions. [2022-12-14 08:09:56,809 INFO L78 Accepts]: Start accepts. Automaton has 21587 states and 33169 transitions. Word has length 157 [2022-12-14 08:09:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:56,810 INFO L495 AbstractCegarLoop]: Abstraction has 21587 states and 33169 transitions. [2022-12-14 08:09:56,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:09:56,810 INFO L276 IsEmpty]: Start isEmpty. Operand 21587 states and 33169 transitions. [2022-12-14 08:09:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 08:09:56,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:56,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:56,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:09:56,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:56,835 INFO L85 PathProgramCache]: Analyzing trace with hash -188635153, now seen corresponding path program 1 times [2022-12-14 08:09:56,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:56,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531127406] [2022-12-14 08:09:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:56,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 08:09:56,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:56,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531127406] [2022-12-14 08:09:56,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531127406] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:56,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:56,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:09:56,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644349789] [2022-12-14 08:09:56,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:56,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:56,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:56,915 INFO L87 Difference]: Start difference. First operand 21587 states and 33169 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:09:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:58,159 INFO L93 Difference]: Finished difference Result 60892 states and 93082 transitions. [2022-12-14 08:09:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 08:09:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:58,247 INFO L225 Difference]: With dead ends: 60892 [2022-12-14 08:09:58,247 INFO L226 Difference]: Without dead ends: 40951 [2022-12-14 08:09:58,285 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 08:09:58,285 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3471 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:58,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40951 states. [2022-12-14 08:09:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40951 to 40755. [2022-12-14 08:09:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40755 states, 34987 states have (on average 1.5239660445308256) internal successors, (53319), 35118 states have internal predecessors, (53319), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-12-14 08:09:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40755 states to 40755 states and 61521 transitions. [2022-12-14 08:09:59,577 INFO L78 Accepts]: Start accepts. Automaton has 40755 states and 61521 transitions. Word has length 157 [2022-12-14 08:09:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:59,578 INFO L495 AbstractCegarLoop]: Abstraction has 40755 states and 61521 transitions. [2022-12-14 08:09:59,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:09:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40755 states and 61521 transitions. [2022-12-14 08:09:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 08:09:59,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:59,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:09:59,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1079313241, now seen corresponding path program 1 times [2022-12-14 08:09:59,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:59,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462014032] [2022-12-14 08:09:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 08:09:59,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:59,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462014032] [2022-12-14 08:09:59,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462014032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:59,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:59,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:09:59,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724882102] [2022-12-14 08:09:59,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:59,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:59,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:59,698 INFO L87 Difference]: Start difference. First operand 40755 states and 61521 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:10:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:01,716 INFO L93 Difference]: Finished difference Result 117820 states and 178138 transitions. [2022-12-14 08:10:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:10:01,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 08:10:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:01,908 INFO L225 Difference]: With dead ends: 117820 [2022-12-14 08:10:01,909 INFO L226 Difference]: Without dead ends: 78711 [2022-12-14 08:10:01,976 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 08:10:01,976 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3473 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:01,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:10:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78711 states. [2022-12-14 08:10:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78711 to 78323. [2022-12-14 08:10:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78323 states, 67051 states have (on average 1.5034376817646269) internal successors, (100807), 67310 states have internal predecessors, (100807), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-12-14 08:10:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78323 states to 78323 states and 116689 transitions. [2022-12-14 08:10:04,387 INFO L78 Accepts]: Start accepts. Automaton has 78323 states and 116689 transitions. Word has length 157 [2022-12-14 08:10:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:04,387 INFO L495 AbstractCegarLoop]: Abstraction has 78323 states and 116689 transitions. [2022-12-14 08:10:04,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:10:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 78323 states and 116689 transitions. [2022-12-14 08:10:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 08:10:04,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:04,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:04,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:10:04,494 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:10:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash 237994438, now seen corresponding path program 1 times [2022-12-14 08:10:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:10:04,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856959251] [2022-12-14 08:10:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:10:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 08:10:04,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:10:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856959251] [2022-12-14 08:10:04,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856959251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:10:04,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:10:04,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:10:04,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528994383] [2022-12-14 08:10:04,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:10:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:10:04,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:10:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:10:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:10:04,550 INFO L87 Difference]: Start difference. First operand 78323 states and 116689 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:10:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:09,181 INFO L93 Difference]: Finished difference Result 229372 states and 343514 transitions. [2022-12-14 08:10:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:10:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 08:10:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:09,568 INFO L225 Difference]: With dead ends: 229372 [2022-12-14 08:10:09,568 INFO L226 Difference]: Without dead ends: 152695 [2022-12-14 08:10:09,717 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 08:10:09,718 INFO L413 NwaCegarLoop]: 3292 mSDtfsCounter, 3476 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3476 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:09,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3476 Valid, 3479 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:10:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152695 states. [2022-12-14 08:10:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152695 to 151923. [2022-12-14 08:10:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151923 states, 129899 states have (on average 1.4874864317662184) internal successors, (193223), 130414 states have internal predecessors, (193223), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 08:10:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151923 states to 151923 states and 223953 transitions. [2022-12-14 08:10:14,169 INFO L78 Accepts]: Start accepts. Automaton has 151923 states and 223953 transitions. Word has length 157 [2022-12-14 08:10:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:14,169 INFO L495 AbstractCegarLoop]: Abstraction has 151923 states and 223953 transitions. [2022-12-14 08:10:14,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:10:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 151923 states and 223953 transitions. [2022-12-14 08:10:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 08:10:14,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:14,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:14,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:10:14,520 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:10:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 625856507, now seen corresponding path program 1 times [2022-12-14 08:10:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:10:14,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300927228] [2022-12-14 08:10:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:10:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 08:10:14,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:10:14,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300927228] [2022-12-14 08:10:14,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300927228] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:10:14,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051478422] [2022-12-14 08:10:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:14,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:10:14,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:10:14,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:10:14,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:10:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:10:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 08:10:15,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:10:15,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051478422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:10:15,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:10:15,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:10:15,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294977795] [2022-12-14 08:10:15,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:10:15,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:10:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:10:15,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:10:15,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:10:15,084 INFO L87 Difference]: Start difference. First operand 151923 states and 223953 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:10:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:19,909 INFO L93 Difference]: Finished difference Result 229115 states and 342487 transitions. [2022-12-14 08:10:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:10:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 179 [2022-12-14 08:10:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:20,308 INFO L225 Difference]: With dead ends: 229115 [2022-12-14 08:10:20,309 INFO L226 Difference]: Without dead ends: 152439 [2022-12-14 08:10:20,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 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 08:10:20,469 INFO L413 NwaCegarLoop]: 3413 mSDtfsCounter, 198 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 6658 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:20,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 6658 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:10:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152439 states. [2022-12-14 08:10:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152439 to 151411. [2022-12-14 08:10:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151411 states, 129387 states have (on average 1.4735869909650892) internal successors, (190663), 129902 states have internal predecessors, (190663), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 08:10:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151411 states to 151411 states and 221393 transitions. [2022-12-14 08:10:25,523 INFO L78 Accepts]: Start accepts. Automaton has 151411 states and 221393 transitions. Word has length 179 [2022-12-14 08:10:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:25,523 INFO L495 AbstractCegarLoop]: Abstraction has 151411 states and 221393 transitions. [2022-12-14 08:10:25,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:10:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 151411 states and 221393 transitions. [2022-12-14 08:10:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 08:10:25,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:25,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:10:25,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 08:10:26,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 08:10:26,007 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:10:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:26,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1626410681, now seen corresponding path program 1 times [2022-12-14 08:10:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:10:26,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883526981] [2022-12-14 08:10:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:26,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:10:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 08:10:26,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:10:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883526981] [2022-12-14 08:10:26,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883526981] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:10:26,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29170254] [2022-12-14 08:10:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:26,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:10:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:10:26,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:10:26,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:10:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:10:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:10:26,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:10:26,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29170254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:10:26,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:10:26,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:10:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889144150] [2022-12-14 08:10:26,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:10:26,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:10:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:10:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:10:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:10:26,431 INFO L87 Difference]: Start difference. First operand 151411 states and 221393 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:10:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:31,591 INFO L93 Difference]: Finished difference Result 268273 states and 385230 transitions. [2022-12-14 08:10:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:10:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 08:10:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:32,140 INFO L225 Difference]: With dead ends: 268273 [2022-12-14 08:10:32,140 INFO L226 Difference]: Without dead ends: 192365 [2022-12-14 08:10:32,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 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 08:10:32,281 INFO L413 NwaCegarLoop]: 3282 mSDtfsCounter, 3477 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:32,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3336 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:10:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192365 states. [2022-12-14 08:10:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192365 to 192365. [2022-12-14 08:10:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192365 states, 167273 states have (on average 1.418358013546717) internal successors, (237253), 167788 states have internal predecessors, (237253), 16388 states have call successors, (16388), 8703 states have call predecessors, (16388), 8702 states have return successors, (16386), 15874 states have call predecessors, (16386), 16386 states have call successors, (16386) [2022-12-14 08:10:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192365 states to 192365 states and 270027 transitions. [2022-12-14 08:10:38,193 INFO L78 Accepts]: Start accepts. Automaton has 192365 states and 270027 transitions. Word has length 179 [2022-12-14 08:10:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:38,193 INFO L495 AbstractCegarLoop]: Abstraction has 192365 states and 270027 transitions. [2022-12-14 08:10:38,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:10:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 192365 states and 270027 transitions. [2022-12-14 08:10:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 08:10:38,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:38,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:10:38,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 08:10:38,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 08:10:38,857 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:10:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:38,859 INFO L85 PathProgramCache]: Analyzing trace with hash 162070786, now seen corresponding path program 1 times [2022-12-14 08:10:38,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:10:38,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488115822] [2022-12-14 08:10:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:10:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 08:10:39,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:10:39,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488115822] [2022-12-14 08:10:39,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488115822] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:10:39,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727631380] [2022-12-14 08:10:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:39,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:10:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:10:39,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:10:39,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:10:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:10:39,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:10:39,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:10:39,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727631380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:10:39,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:10:39,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 08:10:39,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73218948] [2022-12-14 08:10:39,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:10:39,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:10:39,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:10:39,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:10:39,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:10:39,390 INFO L87 Difference]: Start difference. First operand 192365 states and 270027 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 08:10:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:50,633 INFO L93 Difference]: Finished difference Result 584547 states and 817343 transitions. [2022-12-14 08:10:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:10:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 180 [2022-12-14 08:10:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:51,842 INFO L225 Difference]: With dead ends: 584547 [2022-12-14 08:10:51,842 INFO L226 Difference]: Without dead ends: 393829 [2022-12-14 08:10:52,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 182 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 08:10:52,129 INFO L413 NwaCegarLoop]: 3476 mSDtfsCounter, 3507 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 7101 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:52,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 7101 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:10:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393829 states. [2022-12-14 08:11:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393829 to 393313. [2022-12-14 08:11:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393313 states, 343141 states have (on average 1.4061187675037374) internal successors, (482497), 344680 states have internal predecessors, (482497), 32256 states have call successors, (32256), 17403 states have call predecessors, (32256), 17914 states have return successors, (33790), 31230 states have call predecessors, (33790), 32254 states have call successors, (33790) [2022-12-14 08:11:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393313 states to 393313 states and 548543 transitions. [2022-12-14 08:11:04,970 INFO L78 Accepts]: Start accepts. Automaton has 393313 states and 548543 transitions. Word has length 180 [2022-12-14 08:11:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:11:04,971 INFO L495 AbstractCegarLoop]: Abstraction has 393313 states and 548543 transitions. [2022-12-14 08:11:04,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 08:11:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 393313 states and 548543 transitions. [2022-12-14 08:11:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 08:11:05,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:11:05,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:11:05,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:11:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:11:06,112 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:11:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:11:06,113 INFO L85 PathProgramCache]: Analyzing trace with hash 63160071, now seen corresponding path program 1 times [2022-12-14 08:11:06,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:11:06,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86243205] [2022-12-14 08:11:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:11:06,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:11:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:11:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 08:11:06,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:11:06,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86243205] [2022-12-14 08:11:06,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86243205] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:11:06,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975884010] [2022-12-14 08:11:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:11:06,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:11:06,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:11:06,322 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:11:06,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:11:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:11:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:11:06,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:11:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:11:06,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:11:06,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975884010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:11:06,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:11:06,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:11:06,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657053221] [2022-12-14 08:11:06,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:11:06,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:11:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:11:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:11:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:11:06,540 INFO L87 Difference]: Start difference. First operand 393313 states and 548543 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:11:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:11:23,711 INFO L93 Difference]: Finished difference Result 913485 states and 1296548 transitions. [2022-12-14 08:11:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:11:23,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 180 [2022-12-14 08:11:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:11:25,490 INFO L225 Difference]: With dead ends: 913485 [2022-12-14 08:11:25,490 INFO L226 Difference]: Without dead ends: 521819 [2022-12-14 08:11:26,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 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 08:11:26,064 INFO L413 NwaCegarLoop]: 3281 mSDtfsCounter, 111 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:11:26,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 6527 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:11:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521819 states. [2022-12-14 08:11:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521819 to 437869. [2022-12-14 08:11:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437869 states, 385643 states have (on average 1.437036326343276) internal successors, (554183), 387184 states have internal predecessors, (554183), 33283 states have call successors, (33283), 18430 states have call predecessors, (33283), 18941 states have return successors, (34817), 32255 states have call predecessors, (34817), 33281 states have call successors, (34817) [2022-12-14 08:11:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437869 states to 437869 states and 622283 transitions. [2022-12-14 08:11:43,870 INFO L78 Accepts]: Start accepts. Automaton has 437869 states and 622283 transitions. Word has length 180 [2022-12-14 08:11:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:11:43,871 INFO L495 AbstractCegarLoop]: Abstraction has 437869 states and 622283 transitions. [2022-12-14 08:11:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:11:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 437869 states and 622283 transitions. [2022-12-14 08:11:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 08:11:44,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:11:44,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:11:44,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 08:11:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:11:44,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:11:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:11:44,845 INFO L85 PathProgramCache]: Analyzing trace with hash 950604076, now seen corresponding path program 2 times [2022-12-14 08:11:44,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:11:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739865842] [2022-12-14 08:11:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:11:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:11:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:11:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 08:11:45,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:11:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739865842] [2022-12-14 08:11:45,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739865842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:11:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643687400] [2022-12-14 08:11:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:11:45,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:11:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:11:45,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:11:45,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:11:45,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:11:45,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:11:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:11:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:11:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:11:45,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:11:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643687400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:11:45,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:11:45,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:11:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594775755] [2022-12-14 08:11:45,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:11:45,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:11:45,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:11:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:11:45,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:11:45,375 INFO L87 Difference]: Start difference. First operand 437869 states and 622283 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:12:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:04,557 INFO L93 Difference]: Finished difference Result 845679 states and 1213637 transitions. [2022-12-14 08:12:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:12:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 180 [2022-12-14 08:12:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:06,726 INFO L225 Difference]: With dead ends: 845679 [2022-12-14 08:12:06,726 INFO L226 Difference]: Without dead ends: 624363 [2022-12-14 08:12:07,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 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 08:12:07,230 INFO L413 NwaCegarLoop]: 3397 mSDtfsCounter, 162 mSDsluCounter, 3262 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 6659 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:07,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 6659 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:12:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624363 states. [2022-12-14 08:12:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624363 to 520813. [2022-12-14 08:12:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520813 states, 464491 states have (on average 1.4774861084498947) internal successors, (686279), 466032 states have internal predecessors, (686279), 35331 states have call successors, (35331), 20478 states have call predecessors, (35331), 20989 states have return successors, (36865), 34303 states have call predecessors, (36865), 35329 states have call successors, (36865) [2022-12-14 08:12:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520813 states to 520813 states and 758475 transitions. [2022-12-14 08:12:27,251 INFO L78 Accepts]: Start accepts. Automaton has 520813 states and 758475 transitions. Word has length 180 [2022-12-14 08:12:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:27,251 INFO L495 AbstractCegarLoop]: Abstraction has 520813 states and 758475 transitions. [2022-12-14 08:12:27,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:12:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 520813 states and 758475 transitions. [2022-12-14 08:12:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 08:12:28,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:28,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:12:28,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 08:12:28,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:12:28,346 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash 798766702, now seen corresponding path program 1 times [2022-12-14 08:12:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:28,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758822925] [2022-12-14 08:12:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 08:12:28,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:28,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758822925] [2022-12-14 08:12:28,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758822925] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:28,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574852603] [2022-12-14 08:12:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:28,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:28,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:28,694 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:28,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:12:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:28,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:12:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 08:12:28,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:12:28,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574852603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:12:28,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:12:28,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 08:12:28,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715544236] [2022-12-14 08:12:28,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:12:28,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:12:28,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:12:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:12:28,917 INFO L87 Difference]: Start difference. First operand 520813 states and 758475 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:12:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:59,752 INFO L93 Difference]: Finished difference Result 1290461 states and 1877817 transitions. [2022-12-14 08:12:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:12:59,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 181 [2022-12-14 08:12:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:13:02,140 INFO L225 Difference]: With dead ends: 1290461 [2022-12-14 08:13:02,140 INFO L226 Difference]: Without dead ends: 771295 [2022-12-14 08:13:02,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:13:02,906 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 7323 mSDsluCounter, 6391 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7341 SdHoareTripleChecker+Valid, 9640 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:13:02,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7341 Valid, 9640 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:13:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771295 states. [2022-12-14 08:13:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771295 to 771291. [2022-12-14 08:13:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771291 states, 687333 states have (on average 1.4683086655231161) internal successors, (1009217), 689642 states have internal predecessors, (1009217), 52477 states have call successors, (52477), 30712 states have call predecessors, (52477), 31479 states have return successors, (54779), 50937 states have call predecessors, (54779), 52475 states have call successors, (54779) [2022-12-14 08:13:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771291 states to 771291 states and 1116473 transitions. [2022-12-14 08:13:37,288 INFO L78 Accepts]: Start accepts. Automaton has 771291 states and 1116473 transitions. Word has length 181 [2022-12-14 08:13:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:13:37,288 INFO L495 AbstractCegarLoop]: Abstraction has 771291 states and 1116473 transitions. [2022-12-14 08:13:37,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:13:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 771291 states and 1116473 transitions. [2022-12-14 08:13:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 08:13:38,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:13:38,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:13:38,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 08:13:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:13:39,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:13:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:13:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1558665982, now seen corresponding path program 1 times [2022-12-14 08:13:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:13:39,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352075064] [2022-12-14 08:13:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:13:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:13:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:13:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 08:13:39,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:13:39,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352075064] [2022-12-14 08:13:39,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352075064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:13:39,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130592868] [2022-12-14 08:13:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:13:39,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:13:39,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:13:39,204 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:13:39,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1e352fd-f5de-4546-ba74-dc33ddfadb3a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:13:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:13:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:13:39,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:13:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 08:13:39,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:13:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130592868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:13:39,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:13:39,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 08:13:39,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878543066] [2022-12-14 08:13:39,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:13:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:13:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:13:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:13:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:13:39,410 INFO L87 Difference]: Start difference. First operand 771291 states and 1116473 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)