./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta --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 a9fe331e5302255756e033832e890b54b7bae1c0bb354f9ba1bbe18985f952e5 --- 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-dbf71c6-m [2022-10-17 17:41:55,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:55,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:55,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:55,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:55,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:55,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:55,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:55,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:55,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:55,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:55,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:55,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:55,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:55,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:55,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:55,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:55,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:55,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:55,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:55,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:55,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:55,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:55,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:55,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:55,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:55,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:55,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:55,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:55,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:55,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:55,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:55,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:55,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:55,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:55,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:55,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:55,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:55,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:55,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:55,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:55,324 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:41:55,372 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:55,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:55,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:55,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:55,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:55,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:55,375 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:55,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:55,376 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:55,376 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:55,377 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:55,377 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:55,377 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:55,378 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:55,378 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:55,378 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:55,378 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:55,378 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:55,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:55,379 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:41:55,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:55,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:41:55,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:55,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:55,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:55,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:55,391 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:41:55,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:55,391 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:55,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:55,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:55,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:55,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:55,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:55,393 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:55,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:55,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:55,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:55,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:55,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:55,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:55,394 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_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9fe331e5302255756e033832e890b54b7bae1c0bb354f9ba1bbe18985f952e5 [2022-10-17 17:41:55,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:55,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:55,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:55,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:55,717 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:55,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2022-10-17 17:41:55,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/data/f48dece12/a60186cc9a094601978e341aee3dc2a2/FLAGd2f25a91b [2022-10-17 17:41:56,338 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:56,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2022-10-17 17:41:56,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/data/f48dece12/a60186cc9a094601978e341aee3dc2a2/FLAGd2f25a91b [2022-10-17 17:41:56,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/data/f48dece12/a60186cc9a094601978e341aee3dc2a2 [2022-10-17 17:41:56,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:56,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:56,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:56,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:56,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:56,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:56" (1/1) ... [2022-10-17 17:41:56,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3711c6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:56, skipping insertion in model container [2022-10-17 17:41:56,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:56" (1/1) ... [2022-10-17 17:41:56,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:56,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:56,922 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[913,926] [2022-10-17 17:41:56,976 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[5977,5990] [2022-10-17 17:41:57,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:57,211 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:57,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[913,926] [2022-10-17 17:41:57,239 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[5977,5990] [2022-10-17 17:41:57,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:57,347 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:57,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57 WrapperNode [2022-10-17 17:41:57,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:57,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:57,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:57,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:57,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,452 INFO L138 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1116 [2022-10-17 17:41:57,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:57,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:57,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:57,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:57,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:57,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:57,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:57,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:57,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (1/1) ... [2022-10-17 17:41:57,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:57,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:57,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:57,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:57,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:41:57,687 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:41:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-10-17 17:41:57,687 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-10-17 17:41:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 17:41:57,688 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 17:41:57,688 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 17:41:57,688 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 17:41:57,688 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 17:41:57,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 17:41:57,689 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 17:41:57,689 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 17:41:57,689 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 17:41:57,689 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 17:41:57,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:57,689 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 17:41:57,690 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 17:41:57,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:57,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:57,690 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 17:41:57,690 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 17:41:57,690 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-10-17 17:41:57,691 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-10-17 17:41:57,876 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:57,878 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:58,856 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:59,510 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:59,511 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-10-17 17:41:59,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:59 BoogieIcfgContainer [2022-10-17 17:41:59,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:59,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:59,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:59,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:59,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:56" (1/3) ... [2022-10-17 17:41:59,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ad39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:59, skipping insertion in model container [2022-10-17 17:41:59,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:57" (2/3) ... [2022-10-17 17:41:59,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ad39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:59, skipping insertion in model container [2022-10-17 17:41:59,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:59" (3/3) ... [2022-10-17 17:41:59,524 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.15.cil.c [2022-10-17 17:41:59,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:59,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:41:59,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:59,642 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;@1a6acb31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:59,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:41:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 208 states have (on average 1.5721153846153846) internal successors, (327), 215 states have internal predecessors, (327), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:41:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 17:41:59,665 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:59,665 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] [2022-10-17 17:41:59,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash 684296215, now seen corresponding path program 1 times [2022-10-17 17:41:59,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:59,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525761299] [2022-10-17 17:41:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:00,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:00,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525761299] [2022-10-17 17:42:00,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525761299] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:00,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:00,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:00,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043895212] [2022-10-17 17:42:00,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:00,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:00,186 INFO L87 Difference]: Start difference. First operand has 256 states, 208 states have (on average 1.5721153846153846) internal successors, (327), 215 states have internal predecessors, (327), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:42:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:00,477 INFO L93 Difference]: Finished difference Result 544 states and 842 transitions. [2022-10-17 17:42:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:00,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-10-17 17:42:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:00,494 INFO L225 Difference]: With dead ends: 544 [2022-10-17 17:42:00,494 INFO L226 Difference]: Without dead ends: 288 [2022-10-17 17:42:00,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:00,504 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 362 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:00,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 391 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-10-17 17:42:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2022-10-17 17:42:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 234 states have (on average 1.5128205128205128) internal successors, (354), 238 states have internal predecessors, (354), 38 states have call successors, (38), 12 states have call predecessors, (38), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-10-17 17:42:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 426 transitions. [2022-10-17 17:42:00,606 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 426 transitions. Word has length 28 [2022-10-17 17:42:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:00,607 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 426 transitions. [2022-10-17 17:42:00,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:42:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 426 transitions. [2022-10-17 17:42:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 17:42:00,611 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:00,611 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] [2022-10-17 17:42:00,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:42:00,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1229490957, now seen corresponding path program 1 times [2022-10-17 17:42:00,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:00,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961152273] [2022-10-17 17:42:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:00,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:00,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:00,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961152273] [2022-10-17 17:42:00,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961152273] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:00,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:00,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291717501] [2022-10-17 17:42:00,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:00,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:00,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:00,721 INFO L87 Difference]: Start difference. First operand 284 states and 426 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:42:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:00,891 INFO L93 Difference]: Finished difference Result 440 states and 643 transitions. [2022-10-17 17:42:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-10-17 17:42:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:00,895 INFO L225 Difference]: With dead ends: 440 [2022-10-17 17:42:00,896 INFO L226 Difference]: Without dead ends: 359 [2022-10-17 17:42:00,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:00,898 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 360 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:00,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 376 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-10-17 17:42:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 355. [2022-10-17 17:42:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 294 states have (on average 1.4795918367346939) internal successors, (435), 298 states have internal predecessors, (435), 45 states have call successors, (45), 16 states have call predecessors, (45), 14 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-10-17 17:42:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 521 transitions. [2022-10-17 17:42:00,938 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 521 transitions. Word has length 29 [2022-10-17 17:42:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:00,938 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 521 transitions. [2022-10-17 17:42:00,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:42:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 521 transitions. [2022-10-17 17:42:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 17:42:00,941 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:00,941 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] [2022-10-17 17:42:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:42:00,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2112355397, now seen corresponding path program 1 times [2022-10-17 17:42:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264704210] [2022-10-17 17:42:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:01,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:01,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264704210] [2022-10-17 17:42:01,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264704210] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:01,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:01,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334851627] [2022-10-17 17:42:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:01,037 INFO L87 Difference]: Start difference. First operand 355 states and 521 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:42:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:01,213 INFO L93 Difference]: Finished difference Result 595 states and 849 transitions. [2022-10-17 17:42:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-10-17 17:42:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:01,218 INFO L225 Difference]: With dead ends: 595 [2022-10-17 17:42:01,218 INFO L226 Difference]: Without dead ends: 443 [2022-10-17 17:42:01,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:01,227 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 46 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:01,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 637 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-10-17 17:42:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 429. [2022-10-17 17:42:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 357 states have (on average 1.4565826330532212) internal successors, (520), 363 states have internal predecessors, (520), 51 states have call successors, (51), 21 states have call predecessors, (51), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-10-17 17:42:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 618 transitions. [2022-10-17 17:42:01,281 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 618 transitions. Word has length 30 [2022-10-17 17:42:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:01,282 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 618 transitions. [2022-10-17 17:42:01,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:42:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 618 transitions. [2022-10-17 17:42:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 17:42:01,292 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:01,294 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:42:01,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:42:01,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash 14284306, now seen corresponding path program 1 times [2022-10-17 17:42:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820690712] [2022-10-17 17:42:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:01,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:42:01,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:01,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820690712] [2022-10-17 17:42:01,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820690712] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:01,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:01,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:01,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309386299] [2022-10-17 17:42:01,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:01,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:01,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:01,451 INFO L87 Difference]: Start difference. First operand 429 states and 618 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 17:42:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:01,632 INFO L93 Difference]: Finished difference Result 592 states and 836 transitions. [2022-10-17 17:42:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:01,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-10-17 17:42:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:01,638 INFO L225 Difference]: With dead ends: 592 [2022-10-17 17:42:01,638 INFO L226 Difference]: Without dead ends: 434 [2022-10-17 17:42:01,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:01,650 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 32 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:01,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 669 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-10-17 17:42:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 423. [2022-10-17 17:42:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 351 states have (on average 1.4415954415954415) internal successors, (506), 357 states have internal predecessors, (506), 51 states have call successors, (51), 21 states have call predecessors, (51), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-10-17 17:42:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 604 transitions. [2022-10-17 17:42:01,695 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 604 transitions. Word has length 43 [2022-10-17 17:42:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:01,696 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 604 transitions. [2022-10-17 17:42:01,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 17:42:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 604 transitions. [2022-10-17 17:42:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:42:01,698 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:01,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:01,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:42:01,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2026671885, now seen corresponding path program 1 times [2022-10-17 17:42:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:01,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280735681] [2022-10-17 17:42:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:42:01,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:01,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280735681] [2022-10-17 17:42:01,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280735681] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:01,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:01,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:01,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797528517] [2022-10-17 17:42:01,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:01,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:01,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:01,816 INFO L87 Difference]: Start difference. First operand 423 states and 604 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:42:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:01,960 INFO L93 Difference]: Finished difference Result 672 states and 928 transitions. [2022-10-17 17:42:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:01,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-10-17 17:42:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:01,969 INFO L225 Difference]: With dead ends: 672 [2022-10-17 17:42:01,969 INFO L226 Difference]: Without dead ends: 469 [2022-10-17 17:42:01,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:01,972 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 346 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:01,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 374 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-10-17 17:42:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2022-10-17 17:42:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 390 states have (on average 1.4076923076923078) internal successors, (549), 396 states have internal predecessors, (549), 55 states have call successors, (55), 24 states have call predecessors, (55), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-10-17 17:42:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 655 transitions. [2022-10-17 17:42:02,022 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 655 transitions. Word has length 46 [2022-10-17 17:42:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:02,023 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 655 transitions. [2022-10-17 17:42:02,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:42:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 655 transitions. [2022-10-17 17:42:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:42:02,026 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:02,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:42:02,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -859052702, now seen corresponding path program 1 times [2022-10-17 17:42:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:02,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602264009] [2022-10-17 17:42:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:42:02,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602264009] [2022-10-17 17:42:02,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602264009] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:02,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:02,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568501474] [2022-10-17 17:42:02,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:02,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:02,112 INFO L87 Difference]: Start difference. First operand 469 states and 655 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:42:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:02,403 INFO L93 Difference]: Finished difference Result 696 states and 955 transitions. [2022-10-17 17:42:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:02,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-10-17 17:42:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:02,410 INFO L225 Difference]: With dead ends: 696 [2022-10-17 17:42:02,410 INFO L226 Difference]: Without dead ends: 467 [2022-10-17 17:42:02,411 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 [2022-10-17 17:42:02,412 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 401 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:02,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 626 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-10-17 17:42:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2022-10-17 17:42:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 386 states have (on average 1.3808290155440415) internal successors, (533), 392 states have internal predecessors, (533), 55 states have call successors, (55), 24 states have call predecessors, (55), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-10-17 17:42:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 639 transitions. [2022-10-17 17:42:02,491 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 639 transitions. Word has length 47 [2022-10-17 17:42:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:02,492 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 639 transitions. [2022-10-17 17:42:02,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:42:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 639 transitions. [2022-10-17 17:42:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:42:02,495 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:02,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:02,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:42:02,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash 13785953, now seen corresponding path program 1 times [2022-10-17 17:42:02,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:02,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142484217] [2022-10-17 17:42:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:02,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:42:02,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:02,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142484217] [2022-10-17 17:42:02,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142484217] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:02,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:02,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122280842] [2022-10-17 17:42:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:02,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:02,608 INFO L87 Difference]: Start difference. First operand 465 states and 639 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 17:42:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:02,909 INFO L93 Difference]: Finished difference Result 501 states and 680 transitions. [2022-10-17 17:42:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-10-17 17:42:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:02,914 INFO L225 Difference]: With dead ends: 501 [2022-10-17 17:42:02,914 INFO L226 Difference]: Without dead ends: 498 [2022-10-17 17:42:02,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:42:02,916 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 624 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:02,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 367 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-10-17 17:42:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 464. [2022-10-17 17:42:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 386 states have (on average 1.3756476683937824) internal successors, (531), 391 states have internal predecessors, (531), 54 states have call successors, (54), 24 states have call predecessors, (54), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-10-17 17:42:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 636 transitions. [2022-10-17 17:42:02,965 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 636 transitions. Word has length 47 [2022-10-17 17:42:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:02,966 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 636 transitions. [2022-10-17 17:42:02,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 17:42:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 636 transitions. [2022-10-17 17:42:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 17:42:02,968 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:02,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:02,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:42:02,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:02,969 INFO L85 PathProgramCache]: Analyzing trace with hash 425881776, now seen corresponding path program 1 times [2022-10-17 17:42:02,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:02,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246560046] [2022-10-17 17:42:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:02,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:42:03,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:03,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246560046] [2022-10-17 17:42:03,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246560046] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:03,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106017810] [2022-10-17 17:42:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:03,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:03,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:03,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:03,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99037db-7c29-421e-b274-bf3ba6870207/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:42:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:03,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:42:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:03,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:42:03,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106017810] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:03,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640323926] [2022-10-17 17:42:03,776 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-10-17 17:42:03,776 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:03,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:03,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:03,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:12,034 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 195 for LOIs [2022-10-17 17:42:12,064 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 210 for LOIs [2022-10-17 17:42:12,096 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 436 for LOIs [2022-10-17 17:42:20,706 INFO L180 IcfgInterpreter]: Interpretation finished