./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur --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 48263e5b2fdfa125a212d9dd2b1aa7b4bc28734093ef4904b2507084a0cf2933 --- 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-38b53e6 [2022-11-26 01:09:07,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:09:07,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:09:07,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:09:07,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:09:07,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:09:07,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:09:07,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:09:07,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:09:07,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:09:07,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:09:07,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:09:07,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:09:07,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:09:07,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:09:07,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:09:07,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:09:07,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:09:07,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:09:07,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:09:07,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:09:07,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:09:07,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:09:07,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:09:07,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:09:07,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:09:07,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:09:07,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:09:07,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:09:07,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:09:07,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:09:07,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:09:07,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:09:07,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:09:07,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:09:07,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:09:07,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:09:07,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:09:07,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:09:07,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:09:07,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:09:07,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:09:07,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:09:07,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:09:07,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:09:07,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:09:07,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:09:07,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:09:07,385 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:09:07,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:09:07,385 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:09:07,386 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:09:07,387 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:09:07,388 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:09:07,388 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:09:07,388 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:09:07,389 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:09:07,389 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:09:07,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:09:07,390 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:09:07,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:09:07,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:09:07,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:09:07,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:09:07,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:09:07,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:09:07,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:09:07,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:09:07,396 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:09:07,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:09:07,396 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:09:07,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:09:07,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:09:07,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:09:07,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:07,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:09:07,399 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:09:07,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:09:07,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:09:07,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:09:07,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:09:07,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:09:07,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:09:07,402 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_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48263e5b2fdfa125a212d9dd2b1aa7b4bc28734093ef4904b2507084a0cf2933 [2022-11-26 01:09:07,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:09:07,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:09:07,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:09:07,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:09:07,841 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:09:07,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c [2022-11-26 01:09:11,094 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:09:11,935 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:09:11,936 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c [2022-11-26 01:09:11,994 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/data/c12d049ff/752d42bec04b4c468ddfdb4c622f7ccd/FLAG0261beee9 [2022-11-26 01:09:12,016 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/data/c12d049ff/752d42bec04b4c468ddfdb4c622f7ccd [2022-11-26 01:09:12,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:09:12,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:09:12,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:12,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:09:12,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:09:12,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:12" (1/1) ... [2022-11-26 01:09:12,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510391af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:12, skipping insertion in model container [2022-11-26 01:09:12,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:12" (1/1) ... [2022-11-26 01:09:12,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:09:12,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:09:14,945 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_229aeb91-e191-4e5c-8f81-a81bba590003/sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c[378560,378573] [2022-11-26 01:09:14,982 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_229aeb91-e191-4e5c-8f81-a81bba590003/sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c[383339,383352] [2022-11-26 01:09:15,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:15,407 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:09:16,677 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_229aeb91-e191-4e5c-8f81-a81bba590003/sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c[378560,378573] [2022-11-26 01:09:16,689 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_229aeb91-e191-4e5c-8f81-a81bba590003/sv-benchmarks/c/combinations/Problem05_label42+token_ring.12.cil-2.c[383339,383352] [2022-11-26 01:09:16,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:16,823 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:09:16,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16 WrapperNode [2022-11-26 01:09:16,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:16,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:16,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:09:16,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:09:16,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:16,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,303 INFO L138 Inliner]: procedures = 68, calls = 77, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 13199 [2022-11-26 01:09:17,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:17,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:09:17,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:09:17,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:09:17,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:17,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:18,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:09:18,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:09:18,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:09:18,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:09:18,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:18,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:18,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:18,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:09:18,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:09:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:09:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 01:09:18,284 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 01:09:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-26 01:09:18,285 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-26 01:09:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 01:09:18,285 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 01:09:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 01:09:18,285 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 01:09:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 01:09:18,285 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 01:09:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 01:09:18,286 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 01:09:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:09:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:09:18,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:09:18,572 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:09:18,575 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:09:28,873 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:09:31,632 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:09:31,632 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-26 01:09:31,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:31 BoogieIcfgContainer [2022-11-26 01:09:31,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:09:31,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:09:31,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:09:31,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:09:31,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:09:12" (1/3) ... [2022-11-26 01:09:31,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8f8f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:31, skipping insertion in model container [2022-11-26 01:09:31,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16" (2/3) ... [2022-11-26 01:09:31,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8f8f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:31, skipping insertion in model container [2022-11-26 01:09:31,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:31" (3/3) ... [2022-11-26 01:09:31,655 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.12.cil-2.c [2022-11-26 01:09:31,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:09:31,680 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 01:09:31,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:09:31,820 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;@6df99cdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:09:31,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 01:09:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-26 01:09:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 01:09:31,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:31,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:31,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -603071020, now seen corresponding path program 1 times [2022-11-26 01:09:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:31,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475046562] [2022-11-26 01:09:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:31,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:32,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475046562] [2022-11-26 01:09:32,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475046562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:32,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:32,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:09:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438515986] [2022-11-26 01:09:32,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:32,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:09:32,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:09:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:09:32,482 INFO L87 Difference]: Start difference. First operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 01:09:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:33,773 INFO L93 Difference]: Finished difference Result 3833 states and 7427 transitions. [2022-11-26 01:09:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:09:33,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-11-26 01:09:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:33,803 INFO L225 Difference]: With dead ends: 3833 [2022-11-26 01:09:33,804 INFO L226 Difference]: Without dead ends: 2001 [2022-11-26 01:09:33,816 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 [2022-11-26 01:09:33,823 INFO L413 NwaCegarLoop]: 3511 mSDtfsCounter, 3779 mSDsluCounter, 3413 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3779 SdHoareTripleChecker+Valid, 6924 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:33,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3779 Valid, 6924 Invalid, 740 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:09:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-11-26 01:09:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 2000. [2022-11-26 01:09:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1938 states have (on average 1.9195046439628483) internal successors, (3720), 1941 states have internal predecessors, (3720), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-26 01:09:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 3816 transitions. [2022-11-26 01:09:33,966 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 3816 transitions. Word has length 67 [2022-11-26 01:09:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:33,967 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 3816 transitions. [2022-11-26 01:09:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 01:09:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 3816 transitions. [2022-11-26 01:09:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:33,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:33,975 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:33,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:09:33,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash -799309757, now seen corresponding path program 1 times [2022-11-26 01:09:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:33,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407520269] [2022-11-26 01:09:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:33,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:34,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407520269] [2022-11-26 01:09:34,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407520269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806923383] [2022-11-26 01:09:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:34,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:34,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:34,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:34,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:09:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:34,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:09:34,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:09:34,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:34,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806923383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:34,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:34,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:09:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321196941] [2022-11-26 01:09:34,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:34,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:34,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:34,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:34,846 INFO L87 Difference]: Start difference. First operand 2000 states and 3816 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:35,439 INFO L93 Difference]: Finished difference Result 2701 states and 4915 transitions. [2022-11-26 01:09:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-26 01:09:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:35,458 INFO L225 Difference]: With dead ends: 2701 [2022-11-26 01:09:35,459 INFO L226 Difference]: Without dead ends: 2347 [2022-11-26 01:09:35,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:35,463 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 3507 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:35,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3568 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:09:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-11-26 01:09:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2343. [2022-11-26 01:09:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2227 states have (on average 1.8666367310282892) internal successors, (4157), 2231 states have internal predecessors, (4157), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-26 01:09:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4337 transitions. [2022-11-26 01:09:35,578 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4337 transitions. Word has length 136 [2022-11-26 01:09:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:35,579 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 4337 transitions. [2022-11-26 01:09:35,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4337 transitions. [2022-11-26 01:09:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:35,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:35,596 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:35,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:35,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:35,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1141284707, now seen corresponding path program 1 times [2022-11-26 01:09:35,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:35,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487898644] [2022-11-26 01:09:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:36,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487898644] [2022-11-26 01:09:36,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487898644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134691481] [2022-11-26 01:09:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:36,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:36,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:09:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:36,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:09:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 01:09:36,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:36,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134691481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:36,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:36,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:09:36,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888414983] [2022-11-26 01:09:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:36,541 INFO L87 Difference]: Start difference. First operand 2343 states and 4337 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:37,327 INFO L93 Difference]: Finished difference Result 3724 states and 6496 transitions. [2022-11-26 01:09:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:37,328 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-26 01:09:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:37,344 INFO L225 Difference]: With dead ends: 3724 [2022-11-26 01:09:37,345 INFO L226 Difference]: Without dead ends: 3027 [2022-11-26 01:09:37,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:37,350 INFO L413 NwaCegarLoop]: 3342 mSDtfsCounter, 3525 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:37,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3567 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:09:37,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2022-11-26 01:09:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 3021. [2022-11-26 01:09:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2799 states have (on average 1.7931404072883173) internal successors, (5019), 2805 states have internal predecessors, (5019), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-26 01:09:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5363 transitions. [2022-11-26 01:09:37,481 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5363 transitions. Word has length 136 [2022-11-26 01:09:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:37,484 INFO L495 AbstractCegarLoop]: Abstraction has 3021 states and 5363 transitions. [2022-11-26 01:09:37,484 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5363 transitions. [2022-11-26 01:09:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:37,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:37,492 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:37,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:37,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1709951357, now seen corresponding path program 1 times [2022-11-26 01:09:37,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:37,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381401809] [2022-11-26 01:09:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:37,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:37,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:37,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381401809] [2022-11-26 01:09:37,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381401809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:37,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474658023] [2022-11-26 01:09:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:37,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:37,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:37,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:37,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:09:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:09:38,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 01:09:38,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:38,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474658023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:38,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:38,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:09:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573152779] [2022-11-26 01:09:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:38,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:38,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:38,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:38,236 INFO L87 Difference]: Start difference. First operand 3021 states and 5363 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:38,903 INFO L93 Difference]: Finished difference Result 5746 states and 9608 transitions. [2022-11-26 01:09:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:38,904 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-26 01:09:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:38,927 INFO L225 Difference]: With dead ends: 5746 [2022-11-26 01:09:38,928 INFO L226 Difference]: Without dead ends: 4371 [2022-11-26 01:09:38,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:38,940 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3519 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:38,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:09:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-11-26 01:09:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4361. [2022-11-26 01:09:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4361 states, 3931 states have (on average 1.709234291528873) internal successors, (6719), 3941 states have internal predecessors, (6719), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-26 01:09:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4361 states to 4361 states and 7383 transitions. [2022-11-26 01:09:39,159 INFO L78 Accepts]: Start accepts. Automaton has 4361 states and 7383 transitions. Word has length 136 [2022-11-26 01:09:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:39,160 INFO L495 AbstractCegarLoop]: Abstraction has 4361 states and 7383 transitions. [2022-11-26 01:09:39,160 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4361 states and 7383 transitions. [2022-11-26 01:09:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:39,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:39,170 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:39,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:39,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:39,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1821792861, now seen corresponding path program 1 times [2022-11-26 01:09:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:39,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179874872] [2022-11-26 01:09:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:39,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:39,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:39,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179874872] [2022-11-26 01:09:39,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179874872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292974216] [2022-11-26 01:09:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:39,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:39,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:39,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:09:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:09:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 01:09:40,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:40,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292974216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:40,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:40,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:09:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392699784] [2022-11-26 01:09:40,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:40,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:40,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:40,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:40,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:40,050 INFO L87 Difference]: Start difference. First operand 4361 states and 7383 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:40,875 INFO L93 Difference]: Finished difference Result 9742 states and 15732 transitions. [2022-11-26 01:09:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:40,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-26 01:09:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:40,922 INFO L225 Difference]: With dead ends: 9742 [2022-11-26 01:09:40,923 INFO L226 Difference]: Without dead ends: 7027 [2022-11-26 01:09:40,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:40,941 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3528 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 3565 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:40,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 3565 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:09:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7027 states. [2022-11-26 01:09:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7027 to 7009. [2022-11-26 01:09:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 6171 states have (on average 1.631988332523092) internal successors, (10071), 6189 states have internal predecessors, (10071), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-26 01:09:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 11359 transitions. [2022-11-26 01:09:41,542 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 11359 transitions. Word has length 136 [2022-11-26 01:09:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:41,542 INFO L495 AbstractCegarLoop]: Abstraction has 7009 states and 11359 transitions. [2022-11-26 01:09:41,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 11359 transitions. [2022-11-26 01:09:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:41,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:41,563 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:41,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:41,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:41,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1427162493, now seen corresponding path program 1 times [2022-11-26 01:09:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:41,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708724114] [2022-11-26 01:09:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:41,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:42,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708724114] [2022-11-26 01:09:42,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708724114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654545704] [2022-11-26 01:09:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:42,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:42,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:09:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:42,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:09:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:09:42,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:42,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654545704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:42,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:42,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:09:42,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843312145] [2022-11-26 01:09:42,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:42,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:42,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:42,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:42,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:42,485 INFO L87 Difference]: Start difference. First operand 7009 states and 11359 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:43,797 INFO L93 Difference]: Finished difference Result 17638 states and 27780 transitions. [2022-11-26 01:09:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-26 01:09:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:43,911 INFO L225 Difference]: With dead ends: 17638 [2022-11-26 01:09:43,911 INFO L226 Difference]: Without dead ends: 12275 [2022-11-26 01:09:43,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:43,944 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3498 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3498 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:43,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3498 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:09:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12275 states. [2022-11-26 01:09:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12275 to 12241. [2022-11-26 01:09:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12241 states, 10603 states have (on average 1.5730453645194755) internal successors, (16679), 10637 states have internal predecessors, (16679), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-26 01:09:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12241 states to 12241 states and 19183 transitions. [2022-11-26 01:09:45,021 INFO L78 Accepts]: Start accepts. Automaton has 12241 states and 19183 transitions. Word has length 136 [2022-11-26 01:09:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:45,025 INFO L495 AbstractCegarLoop]: Abstraction has 12241 states and 19183 transitions. [2022-11-26 01:09:45,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12241 states and 19183 transitions. [2022-11-26 01:09:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:45,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:45,048 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:45,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:45,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:45,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1894869149, now seen corresponding path program 1 times [2022-11-26 01:09:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:45,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242333593] [2022-11-26 01:09:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:45,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:45,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:45,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242333593] [2022-11-26 01:09:45,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242333593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:45,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935270258] [2022-11-26 01:09:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:45,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:45,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:45,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:45,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:09:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:09:45,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 01:09:45,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935270258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:45,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:45,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:09:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672526532] [2022-11-26 01:09:45,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:45,796 INFO L87 Difference]: Start difference. First operand 12241 states and 19183 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:47,200 INFO L93 Difference]: Finished difference Result 33238 states and 51476 transitions. [2022-11-26 01:09:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-26 01:09:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:47,305 INFO L225 Difference]: With dead ends: 33238 [2022-11-26 01:09:47,305 INFO L226 Difference]: Without dead ends: 22643 [2022-11-26 01:09:47,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:47,346 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3501 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:47,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:09:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22643 states. [2022-11-26 01:09:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22643 to 22577. [2022-11-26 01:09:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22577 states, 19371 states have (on average 1.533374632182128) internal successors, (29703), 19437 states have internal predecessors, (29703), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-26 01:09:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22577 states to 22577 states and 34575 transitions. [2022-11-26 01:09:48,535 INFO L78 Accepts]: Start accepts. Automaton has 22577 states and 34575 transitions. Word has length 136 [2022-11-26 01:09:48,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:48,537 INFO L495 AbstractCegarLoop]: Abstraction has 22577 states and 34575 transitions. [2022-11-26 01:09:48,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22577 states and 34575 transitions. [2022-11-26 01:09:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:48,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:48,582 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:48,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:48,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:48,792 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:48,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1825017475, now seen corresponding path program 1 times [2022-11-26 01:09:48,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:48,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244899964] [2022-11-26 01:09:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:49,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244899964] [2022-11-26 01:09:49,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244899964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:49,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657762353] [2022-11-26 01:09:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:49,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:49,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:49,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:09:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:09:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 01:09:49,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:49,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657762353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:49,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:49,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:09:49,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513035704] [2022-11-26 01:09:49,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:49,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:49,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:49,520 INFO L87 Difference]: Start difference. First operand 22577 states and 34575 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:52,078 INFO L93 Difference]: Finished difference Result 64054 states and 98068 transitions. [2022-11-26 01:09:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-26 01:09:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:52,342 INFO L225 Difference]: With dead ends: 64054 [2022-11-26 01:09:52,343 INFO L226 Difference]: Without dead ends: 43123 [2022-11-26 01:09:52,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:52,463 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3513 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:52,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:09:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43123 states. [2022-11-26 01:09:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43123 to 42993. [2022-11-26 01:09:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42993 states, 36715 states have (on average 1.5080212447228654) internal successors, (55367), 36845 states have internal predecessors, (55367), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-26 01:09:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42993 states to 42993 states and 64847 transitions. [2022-11-26 01:09:55,313 INFO L78 Accepts]: Start accepts. Automaton has 42993 states and 64847 transitions. Word has length 136 [2022-11-26 01:09:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:55,313 INFO L495 AbstractCegarLoop]: Abstraction has 42993 states and 64847 transitions. [2022-11-26 01:09:55,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:09:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 42993 states and 64847 transitions. [2022-11-26 01:09:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:09:55,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:55,387 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:55,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_229aeb91-e191-4e5c-8f81-a81bba590003/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:55,596 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1306077789, now seen corresponding path program 1 times [2022-11-26 01:09:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:55,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908506136] [2022-11-26 01:09:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:55,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-26 01:09:56,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:56,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908506136] [2022-11-26 01:09:56,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908506136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:56,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:56,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:09:56,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793927913] [2022-11-26 01:09:56,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:56,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:09:56,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:56,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:09:56,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:56,266 INFO L87 Difference]: Start difference. First operand 42993 states and 64847 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:10:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:03,414 INFO L93 Difference]: Finished difference Result 146421 states and 218578 transitions. [2022-11-26 01:10:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:10:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-11-26 01:10:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:04,482 INFO L225 Difference]: With dead ends: 146421 [2022-11-26 01:10:04,483 INFO L226 Difference]: Without dead ends: 105075 [2022-11-26 01:10:04,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:10:04,649 INFO L413 NwaCegarLoop]: 3312 mSDtfsCounter, 4331 mSDsluCounter, 9754 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4352 SdHoareTripleChecker+Valid, 13066 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:04,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4352 Valid, 13066 Invalid, 1371 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [141 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 01:10:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105075 states. [2022-11-26 01:10:09,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105075 to 82801. [2022-11-26 01:10:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82801 states, 70507 states have (on average 1.4914689321627639) internal successors, (105159), 70765 states have internal predecessors, (105159), 9220 states have call successors, (9220), 3072 states have call predecessors, (9220), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-11-26 01:10:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82801 states to 82801 states and 123599 transitions. [2022-11-26 01:10:10,324 INFO L78 Accepts]: Start accepts. Automaton has 82801 states and 123599 transitions. Word has length 136 [2022-11-26 01:10:10,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:10,326 INFO L495 AbstractCegarLoop]: Abstraction has 82801 states and 123599 transitions. [2022-11-26 01:10:10,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:10:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 82801 states and 123599 transitions. [2022-11-26 01:10:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 01:10:10,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:10,431 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:10,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 01:10:10,432 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash -751464290, now seen corresponding path program 1 times [2022-11-26 01:10:10,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:10,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735990400] [2022-11-26 01:10:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-26 01:10:11,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735990400] [2022-11-26 01:10:11,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735990400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:11,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:11,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:10:11,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472327845] [2022-11-26 01:10:11,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:11,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:10:11,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:10:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:11,480 INFO L87 Difference]: Start difference. First operand 82801 states and 123599 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:10:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:21,575 INFO L93 Difference]: Finished difference Result 222197 states and 331089 transitions. [2022-11-26 01:10:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:10:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-11-26 01:10:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:22,263 INFO L225 Difference]: With dead ends: 222197 [2022-11-26 01:10:22,263 INFO L226 Difference]: Without dead ends: 141043 [2022-11-26 01:10:22,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:10:22,840 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 4183 mSDsluCounter, 9846 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4189 SdHoareTripleChecker+Valid, 13150 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:22,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4189 Valid, 13150 Invalid, 1388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [151 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 01:10:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141043 states.