./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12_variant.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12_variant.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 726fce4da80b267da781dea82372ef1c43891e7d5d6ac2b3894c611bc25a242b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:31:15,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:31:15,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:31:15,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:31:15,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:31:15,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:31:15,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:31:15,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:31:15,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:31:15,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:31:15,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:31:15,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:31:15,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:31:15,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:31:15,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:31:15,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:31:15,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:31:15,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:31:15,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:31:15,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:31:15,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:31:15,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:31:15,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:31:15,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:31:15,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:31:15,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:31:15,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:31:15,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:31:15,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:31:15,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:31:15,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:31:15,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:31:15,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:31:15,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:31:15,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:31:15,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:31:15,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:31:15,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:31:15,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:31:15,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:31:15,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:31:15,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:31:15,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:31:15,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:31:15,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:31:15,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:31:15,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:31:15,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:31:15,366 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:31:15,366 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:31:15,366 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:31:15,366 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:31:15,366 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:31:15,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:31:15,367 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:31:15,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:31:15,367 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:31:15,367 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:31:15,367 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:31:15,367 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:31:15,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:31:15,368 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:31:15,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:31:15,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:31:15,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:31:15,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:31:15,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:31:15,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:31:15,369 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:31:15,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:31:15,369 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:31:15,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:31:15,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:31:15,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:31:15,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:31:15,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:31:15,370 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:31:15,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:31:15,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:31:15,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:31:15,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:31:15,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:31:15,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:31:15,371 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_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 726fce4da80b267da781dea82372ef1c43891e7d5d6ac2b3894c611bc25a242b [2022-12-14 07:31:15,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:31:15,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:31:15,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:31:15,559 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:31:15,559 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:31:15,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-12-14 07:31:18,114 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:31:18,323 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:31:18,324 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-12-14 07:31:18,337 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/data/c26144cb9/929579e6eec84f109b4ea5b3fea14886/FLAG9333eeb7a [2022-12-14 07:31:18,350 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/data/c26144cb9/929579e6eec84f109b4ea5b3fea14886 [2022-12-14 07:31:18,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:31:18,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:31:18,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:31:18,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:31:18,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:31:18,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217ddd2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18, skipping insertion in model container [2022-12-14 07:31:18,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:31:18,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:31:18,752 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_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-12-14 07:31:18,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:31:18,760 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:31:18,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:31:18,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:31:18,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:31:18,782 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:31:18,821 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_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-12-14 07:31:18,822 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:31:18,822 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:31:18,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:31:18,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:31:18,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:31:18,889 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:31:18,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18 WrapperNode [2022-12-14 07:31:18,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:31:18,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:31:18,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:31:18,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:31:18,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,922 INFO L138 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2022-12-14 07:31:18,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:31:18,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:31:18,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:31:18,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:31:18,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,940 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:31:18,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:31:18,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:31:18,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:31:18,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (1/1) ... [2022-12-14 07:31:18,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:31:18,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:18,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:31:18,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b744bff-8b1e-4539-87fb-6ae0f0e2e775/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:31:19,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-12-14 07:31:19,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:31:19,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:31:19,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:31:19,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:31:19,005 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 07:31:19,096 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:31:19,097 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:31:19,219 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:31:19,245 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:31:19,245 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 07:31:19,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:31:19 BoogieIcfgContainer [2022-12-14 07:31:19,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:31:19,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:31:19,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:31:19,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:31:19,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:31:18" (1/3) ... [2022-12-14 07:31:19,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3463c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:31:19, skipping insertion in model container [2022-12-14 07:31:19,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:18" (2/3) ... [2022-12-14 07:31:19,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3463c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:31:19, skipping insertion in model container [2022-12-14 07:31:19,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:31:19" (3/3) ... [2022-12-14 07:31:19,255 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2022-12-14 07:31:19,263 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 07:31:19,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:31:19,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:31:19,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:31:19,310 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:31:19,337 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:31:19,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 88 transitions, 181 flow [2022-12-14 07:31:19,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 88 transitions, 181 flow [2022-12-14 07:31:19,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 181 flow [2022-12-14 07:31:19,391 INFO L130 PetriNetUnfolder]: 7/100 cut-off events. [2022-12-14 07:31:19,392 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 07:31:19,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 100 events. 7/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2022-12-14 07:31:19,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 1080 [2022-12-14 07:31:21,788 INFO L134 LiptonReduction]: Checked pairs total: 1229 [2022-12-14 07:31:21,788 INFO L136 LiptonReduction]: Total number of compositions: 94 [2022-12-14 07:31:21,794 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 13 transitions, 31 flow [2022-12-14 07:31:21,802 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:21,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:31:21,819 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;@4f022f0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:31:21,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-14 07:31:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:31:21,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:21,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 07:31:21,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash -788091894, now seen corresponding path program 1 times [2022-12-14 07:31:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:21,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272183926] [2022-12-14 07:31:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:31:21,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:31:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:31:21,952 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:31:21,953 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:31:21,954 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-14 07:31:21,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-14 07:31:21,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-14 07:31:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:31:21,957 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 07:31:21,959 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:31:21,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 07:31:21,975 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:31:21,979 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:31:21,979 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 125 transitions, 262 flow [2022-12-14 07:31:21,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 125 transitions, 262 flow [2022-12-14 07:31:21,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 125 transitions, 262 flow [2022-12-14 07:31:22,010 INFO L130 PetriNetUnfolder]: 12/151 cut-off events. [2022-12-14 07:31:22,011 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 07:31:22,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 12/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 264 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-12-14 07:31:22,014 INFO L119 LiptonReduction]: Number of co-enabled transitions 4824 [2022-12-14 07:31:24,528 INFO L134 LiptonReduction]: Checked pairs total: 11576 [2022-12-14 07:31:24,528 INFO L136 LiptonReduction]: Total number of compositions: 118 [2022-12-14 07:31:24,529 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 36 transitions, 84 flow [2022-12-14 07:31:24,562 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 925 states, 917 states have (on average 3.123227917121047) internal successors, (2864), 924 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:24,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:31:24,564 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;@4f022f0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:31:24,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 07:31:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 925 states, 917 states have (on average 3.123227917121047) internal successors, (2864), 924 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:31:24,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:24,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:24,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-14 07:31:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2110296733, now seen corresponding path program 1 times [2022-12-14 07:31:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620210891] [2022-12-14 07:31:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:24,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620210891] [2022-12-14 07:31:24,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620210891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:24,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:24,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577425329] [2022-12-14 07:31:24,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:24,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:24,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:24,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:24,704 INFO L87 Difference]: Start difference. First operand has 925 states, 917 states have (on average 3.123227917121047) internal successors, (2864), 924 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:24,787 INFO L93 Difference]: Finished difference Result 899 states and 2537 transitions. [2022-12-14 07:31:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:31:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:24,802 INFO L225 Difference]: With dead ends: 899 [2022-12-14 07:31:24,802 INFO L226 Difference]: Without dead ends: 899 [2022-12-14 07:31:24,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:24,805 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:24,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:31:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-12-14 07:31:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 835. [2022-12-14 07:31:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 831 states have (on average 2.912154031287605) internal successors, (2420), 834 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2420 transitions. [2022-12-14 07:31:24,864 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2420 transitions. Word has length 9 [2022-12-14 07:31:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:24,865 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 2420 transitions. [2022-12-14 07:31:24,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2420 transitions. [2022-12-14 07:31:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:31:24,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:24,866 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 07:31:24,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:31:24,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-14 07:31:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1715673509, now seen corresponding path program 1 times [2022-12-14 07:31:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:24,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312724032] [2022-12-14 07:31:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:24,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:31:24,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:31:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:31:24,893 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:31:24,893 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:31:24,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-14 07:31:24,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-14 07:31:24,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-14 07:31:24,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-14 07:31:24,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:31:24,894 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-14 07:31:24,894 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:31:24,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 07:31:24,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:31:24,913 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:31:24,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 162 transitions, 345 flow [2022-12-14 07:31:24,914 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 162 transitions, 345 flow [2022-12-14 07:31:24,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 162 transitions, 345 flow [2022-12-14 07:31:24,937 INFO L130 PetriNetUnfolder]: 17/202 cut-off events. [2022-12-14 07:31:24,937 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 07:31:24,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 202 events. 17/202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 480 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-12-14 07:31:24,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 11232 [2022-12-14 07:31:27,499 INFO L134 LiptonReduction]: Checked pairs total: 27029 [2022-12-14 07:31:27,500 INFO L136 LiptonReduction]: Total number of compositions: 145 [2022-12-14 07:31:27,500 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 47 transitions, 115 flow [2022-12-14 07:31:27,707 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10224 states, 10205 states have (on average 4.026849583537482) internal successors, (41094), 10223 states have internal predecessors, (41094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:27,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:31:27,709 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;@4f022f0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:31:27,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-14 07:31:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 10224 states, 10205 states have (on average 4.026849583537482) internal successors, (41094), 10223 states have internal predecessors, (41094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:31:27,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:27,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:27,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:31:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 642641709, now seen corresponding path program 1 times [2022-12-14 07:31:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:27,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342405367] [2022-12-14 07:31:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:27,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342405367] [2022-12-14 07:31:27,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342405367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:27,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:27,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:27,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795560011] [2022-12-14 07:31:27,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:27,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:27,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:27,801 INFO L87 Difference]: Start difference. First operand has 10224 states, 10205 states have (on average 4.026849583537482) internal successors, (41094), 10223 states have internal predecessors, (41094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:27,981 INFO L93 Difference]: Finished difference Result 9915 states and 38741 transitions. [2022-12-14 07:31:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:31:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:28,042 INFO L225 Difference]: With dead ends: 9915 [2022-12-14 07:31:28,042 INFO L226 Difference]: Without dead ends: 9915 [2022-12-14 07:31:28,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:28,043 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:28,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2022-12-14 07:31:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 9207. [2022-12-14 07:31:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9207 states, 9199 states have (on average 3.9876073486248504) internal successors, (36682), 9206 states have internal predecessors, (36682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9207 states to 9207 states and 36682 transitions. [2022-12-14 07:31:28,372 INFO L78 Accepts]: Start accepts. Automaton has 9207 states and 36682 transitions. Word has length 9 [2022-12-14 07:31:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:28,372 INFO L495 AbstractCegarLoop]: Abstraction has 9207 states and 36682 transitions. [2022-12-14 07:31:28,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9207 states and 36682 transitions. [2022-12-14 07:31:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:31:28,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:28,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:28,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:31:28,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:31:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:28,375 INFO L85 PathProgramCache]: Analyzing trace with hash -823713158, now seen corresponding path program 1 times [2022-12-14 07:31:28,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:28,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028609708] [2022-12-14 07:31:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:28,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028609708] [2022-12-14 07:31:28,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028609708] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:28,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:28,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:31:28,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978741209] [2022-12-14 07:31:28,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:28,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:28,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:28,456 INFO L87 Difference]: Start difference. First operand 9207 states and 36682 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:28,812 INFO L93 Difference]: Finished difference Result 9909 states and 39437 transitions. [2022-12-14 07:31:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:28,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:31:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:28,874 INFO L225 Difference]: With dead ends: 9909 [2022-12-14 07:31:28,874 INFO L226 Difference]: Without dead ends: 9909 [2022-12-14 07:31:28,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:28,875 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:28,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9909 states. [2022-12-14 07:31:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9909 to 9909. [2022-12-14 07:31:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9901 states have (on average 3.983133016866983) internal successors, (39437), 9908 states have internal predecessors, (39437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 39437 transitions. [2022-12-14 07:31:29,273 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 39437 transitions. Word has length 12 [2022-12-14 07:31:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:29,273 INFO L495 AbstractCegarLoop]: Abstraction has 9909 states and 39437 transitions. [2022-12-14 07:31:29,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 39437 transitions. [2022-12-14 07:31:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:31:29,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:29,278 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:29,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:31:29,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:31:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:29,279 INFO L85 PathProgramCache]: Analyzing trace with hash -280314519, now seen corresponding path program 1 times [2022-12-14 07:31:29,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:29,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591499920] [2022-12-14 07:31:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:29,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:29,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:29,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591499920] [2022-12-14 07:31:29,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591499920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:29,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:29,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:29,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173304424] [2022-12-14 07:31:29,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:29,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:29,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:29,323 INFO L87 Difference]: Start difference. First operand 9909 states and 39437 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:29,483 INFO L93 Difference]: Finished difference Result 12597 states and 49023 transitions. [2022-12-14 07:31:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:29,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 07:31:29,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:29,534 INFO L225 Difference]: With dead ends: 12597 [2022-12-14 07:31:29,535 INFO L226 Difference]: Without dead ends: 12597 [2022-12-14 07:31:29,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:29,536 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:29,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12597 states. [2022-12-14 07:31:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12597 to 11701. [2022-12-14 07:31:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11701 states, 11693 states have (on average 3.970324125545198) internal successors, (46425), 11700 states have internal predecessors, (46425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11701 states to 11701 states and 46425 transitions. [2022-12-14 07:31:29,850 INFO L78 Accepts]: Start accepts. Automaton has 11701 states and 46425 transitions. Word has length 13 [2022-12-14 07:31:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:29,851 INFO L495 AbstractCegarLoop]: Abstraction has 11701 states and 46425 transitions. [2022-12-14 07:31:29,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 11701 states and 46425 transitions. [2022-12-14 07:31:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:31:29,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:29,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:29,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:31:29,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:31:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:29,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1037884372, now seen corresponding path program 1 times [2022-12-14 07:31:29,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:29,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803096666] [2022-12-14 07:31:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:29,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:29,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803096666] [2022-12-14 07:31:29,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803096666] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:29,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:29,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:29,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098677135] [2022-12-14 07:31:29,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:31:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:31:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:31:29,995 INFO L87 Difference]: Start difference. First operand 11701 states and 46425 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:30,200 INFO L93 Difference]: Finished difference Result 11782 states and 46690 transitions. [2022-12-14 07:31:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:31:30,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 07:31:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:30,253 INFO L225 Difference]: With dead ends: 11782 [2022-12-14 07:31:30,253 INFO L226 Difference]: Without dead ends: 11782 [2022-12-14 07:31:30,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:31:30,254 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:30,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11782 states. [2022-12-14 07:31:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11782 to 11075. [2022-12-14 07:31:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11075 states, 11067 states have (on average 3.9706334146561852) internal successors, (43943), 11074 states have internal predecessors, (43943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11075 states to 11075 states and 43943 transitions. [2022-12-14 07:31:30,526 INFO L78 Accepts]: Start accepts. Automaton has 11075 states and 43943 transitions. Word has length 15 [2022-12-14 07:31:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:30,527 INFO L495 AbstractCegarLoop]: Abstraction has 11075 states and 43943 transitions. [2022-12-14 07:31:30,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 11075 states and 43943 transitions. [2022-12-14 07:31:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:31:30,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:30,528 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 07:31:30,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:31:30,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:31:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash -877843717, now seen corresponding path program 1 times [2022-12-14 07:31:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:30,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834711016] [2022-12-14 07:31:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:30,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:31:30,538 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:31:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:31:30,545 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:31:30,545 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:31:30,546 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-14 07:31:30,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-14 07:31:30,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-14 07:31:30,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-14 07:31:30,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-14 07:31:30,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:31:30,546 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-14 07:31:30,547 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:31:30,547 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 07:31:30,560 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:31:30,561 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:31:30,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 199 transitions, 430 flow [2022-12-14 07:31:30,562 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 199 transitions, 430 flow [2022-12-14 07:31:30,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 430 flow [2022-12-14 07:31:30,589 INFO L130 PetriNetUnfolder]: 22/253 cut-off events. [2022-12-14 07:31:30,590 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-14 07:31:30,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 253 events. 22/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 703 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 210. Up to 10 conditions per place. [2022-12-14 07:31:30,598 INFO L119 LiptonReduction]: Number of co-enabled transitions 20304 [2022-12-14 07:31:33,979 INFO L134 LiptonReduction]: Checked pairs total: 52077 [2022-12-14 07:31:33,979 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-12-14 07:31:33,980 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 62 transitions, 156 flow [2022-12-14 07:31:36,513 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 113178 states, 113136 states have (on average 5.273104935652666) internal successors, (596578), 113177 states have internal predecessors, (596578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:36,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:31:36,515 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;@4f022f0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:31:36,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 07:31:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 113178 states, 113136 states have (on average 5.273104935652666) internal successors, (596578), 113177 states have internal predecessors, (596578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:36,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:31:36,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:36,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:36,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:31:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:36,650 INFO L85 PathProgramCache]: Analyzing trace with hash 935832119, now seen corresponding path program 1 times [2022-12-14 07:31:36,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:36,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292501306] [2022-12-14 07:31:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:36,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:36,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:36,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292501306] [2022-12-14 07:31:36,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292501306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:36,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:36,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:36,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297548219] [2022-12-14 07:31:36,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:36,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:36,896 INFO L87 Difference]: Start difference. First operand has 113178 states, 113136 states have (on average 5.273104935652666) internal successors, (596578), 113177 states have internal predecessors, (596578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:38,208 INFO L93 Difference]: Finished difference Result 119675 states and 596571 transitions. [2022-12-14 07:31:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:31:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:39,127 INFO L225 Difference]: With dead ends: 119675 [2022-12-14 07:31:39,127 INFO L226 Difference]: Without dead ends: 119675 [2022-12-14 07:31:39,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:39,128 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:39,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119675 states. [2022-12-14 07:31:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119675 to 111127. [2022-12-14 07:31:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111127 states, 111111 states have (on average 5.0625680625680625) internal successors, (562507), 111126 states have internal predecessors, (562507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111127 states to 111127 states and 562507 transitions. [2022-12-14 07:31:43,238 INFO L78 Accepts]: Start accepts. Automaton has 111127 states and 562507 transitions. Word has length 9 [2022-12-14 07:31:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:43,238 INFO L495 AbstractCegarLoop]: Abstraction has 111127 states and 562507 transitions. [2022-12-14 07:31:43,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 111127 states and 562507 transitions. [2022-12-14 07:31:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:31:43,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:43,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:43,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:31:43,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:31:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash -816029580, now seen corresponding path program 1 times [2022-12-14 07:31:43,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263365633] [2022-12-14 07:31:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:43,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:43,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:43,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263365633] [2022-12-14 07:31:43,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263365633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:43,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:43,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:31:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057985500] [2022-12-14 07:31:43,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:43,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:43,287 INFO L87 Difference]: Start difference. First operand 111127 states and 562507 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:44,644 INFO L93 Difference]: Finished difference Result 119669 states and 605107 transitions. [2022-12-14 07:31:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:31:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:45,499 INFO L225 Difference]: With dead ends: 119669 [2022-12-14 07:31:45,499 INFO L226 Difference]: Without dead ends: 119669 [2022-12-14 07:31:45,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:45,500 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:45,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 34 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119669 states. [2022-12-14 07:31:48,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119669 to 119669. [2022-12-14 07:31:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119669 states, 119653 states have (on average 5.057182018002056) internal successors, (605107), 119668 states have internal predecessors, (605107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119669 states to 119669 states and 605107 transitions. [2022-12-14 07:31:49,712 INFO L78 Accepts]: Start accepts. Automaton has 119669 states and 605107 transitions. Word has length 12 [2022-12-14 07:31:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:49,712 INFO L495 AbstractCegarLoop]: Abstraction has 119669 states and 605107 transitions. [2022-12-14 07:31:49,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 119669 states and 605107 transitions. [2022-12-14 07:31:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:31:49,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:49,713 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:49,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:31:49,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:31:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2102540774, now seen corresponding path program 1 times [2022-12-14 07:31:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:49,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214383323] [2022-12-14 07:31:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:49,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:49,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:49,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214383323] [2022-12-14 07:31:49,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214383323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:49,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:49,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:49,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075888253] [2022-12-14 07:31:49,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:49,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:31:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:31:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:49,749 INFO L87 Difference]: Start difference. First operand 119669 states and 605107 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:51,191 INFO L93 Difference]: Finished difference Result 139605 states and 694311 transitions. [2022-12-14 07:31:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:31:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 07:31:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:51,994 INFO L225 Difference]: With dead ends: 139605 [2022-12-14 07:31:51,995 INFO L226 Difference]: Without dead ends: 139605 [2022-12-14 07:31:51,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:31:51,995 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:51,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139605 states. [2022-12-14 07:31:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139605 to 129637. [2022-12-14 07:31:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129637 states, 129621 states have (on average 5.050825097785081) internal successors, (654693), 129636 states have internal predecessors, (654693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129637 states to 129637 states and 654693 transitions. [2022-12-14 07:31:56,846 INFO L78 Accepts]: Start accepts. Automaton has 129637 states and 654693 transitions. Word has length 13 [2022-12-14 07:31:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:56,847 INFO L495 AbstractCegarLoop]: Abstraction has 129637 states and 654693 transitions. [2022-12-14 07:31:56,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 129637 states and 654693 transitions. [2022-12-14 07:31:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:31:56,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:56,849 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:56,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:31:56,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:31:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1594861705, now seen corresponding path program 1 times [2022-12-14 07:31:56,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:56,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348430070] [2022-12-14 07:31:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:56,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:31:56,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:31:56,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348430070] [2022-12-14 07:31:56,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348430070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:31:56,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:31:56,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:31:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827473242] [2022-12-14 07:31:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:31:56,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:31:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:31:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:31:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:31:56,964 INFO L87 Difference]: Start difference. First operand 129637 states and 654693 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:58,427 INFO L93 Difference]: Finished difference Result 133490 states and 673337 transitions. [2022-12-14 07:31:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:31:58,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 07:31:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:59,413 INFO L225 Difference]: With dead ends: 133490 [2022-12-14 07:31:59,413 INFO L226 Difference]: Without dead ends: 133490 [2022-12-14 07:31:59,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:31:59,414 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:59,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 40 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:31:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133490 states. [2022-12-14 07:32:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133490 to 125763. [2022-12-14 07:32:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125763 states, 125747 states have (on average 5.0497347849252865) internal successors, (634989), 125762 states have internal predecessors, (634989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125763 states to 125763 states and 634989 transitions. [2022-12-14 07:32:04,055 INFO L78 Accepts]: Start accepts. Automaton has 125763 states and 634989 transitions. Word has length 15 [2022-12-14 07:32:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:04,055 INFO L495 AbstractCegarLoop]: Abstraction has 125763 states and 634989 transitions. [2022-12-14 07:32:04,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 125763 states and 634989 transitions. [2022-12-14 07:32:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:32:04,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:04,057 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:04,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:32:04,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:32:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1003732326, now seen corresponding path program 1 times [2022-12-14 07:32:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:04,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454362635] [2022-12-14 07:32:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:04,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:32:04,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:04,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454362635] [2022-12-14 07:32:04,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454362635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:04,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:04,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:32:04,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348876496] [2022-12-14 07:32:04,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:04,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:04,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:04,125 INFO L87 Difference]: Start difference. First operand 125763 states and 634989 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:05,404 INFO L93 Difference]: Finished difference Result 135671 states and 684389 transitions. [2022-12-14 07:32:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:32:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:06,208 INFO L225 Difference]: With dead ends: 135671 [2022-12-14 07:32:06,208 INFO L226 Difference]: Without dead ends: 135671 [2022-12-14 07:32:06,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:06,209 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:06,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:32:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135671 states. [2022-12-14 07:32:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135671 to 135671. [2022-12-14 07:32:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135671 states, 135655 states have (on average 5.045070214883344) internal successors, (684389), 135670 states have internal predecessors, (684389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135671 states to 135671 states and 684389 transitions. [2022-12-14 07:32:10,937 INFO L78 Accepts]: Start accepts. Automaton has 135671 states and 684389 transitions. Word has length 16 [2022-12-14 07:32:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:10,937 INFO L495 AbstractCegarLoop]: Abstraction has 135671 states and 684389 transitions. [2022-12-14 07:32:10,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 135671 states and 684389 transitions. [2022-12-14 07:32:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:32:10,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:10,940 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:10,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:32:10,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:32:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:10,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1714323857, now seen corresponding path program 1 times [2022-12-14 07:32:10,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:10,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661521504] [2022-12-14 07:32:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:10,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:32:10,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661521504] [2022-12-14 07:32:10,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661521504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:10,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:10,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900499980] [2022-12-14 07:32:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:32:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:32:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:10,972 INFO L87 Difference]: Start difference. First operand 135671 states and 684389 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:12,850 INFO L93 Difference]: Finished difference Result 157711 states and 782977 transitions. [2022-12-14 07:32:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:32:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 07:32:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:13,770 INFO L225 Difference]: With dead ends: 157711 [2022-12-14 07:32:13,771 INFO L226 Difference]: Without dead ends: 157711 [2022-12-14 07:32:13,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:32:13,771 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:13,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:32:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157711 states. [2022-12-14 07:32:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157711 to 146691. [2022-12-14 07:32:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146691 states, 146675 states have (on average 5.039665928072268) internal successors, (739193), 146690 states have internal predecessors, (739193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146691 states to 146691 states and 739193 transitions. [2022-12-14 07:32:19,093 INFO L78 Accepts]: Start accepts. Automaton has 146691 states and 739193 transitions. Word has length 17 [2022-12-14 07:32:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:19,094 INFO L495 AbstractCegarLoop]: Abstraction has 146691 states and 739193 transitions. [2022-12-14 07:32:19,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 146691 states and 739193 transitions. [2022-12-14 07:32:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 07:32:19,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:19,100 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:19,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:32:19,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:32:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 20525703, now seen corresponding path program 2 times [2022-12-14 07:32:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:19,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727836139] [2022-12-14 07:32:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:32:19,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:32:19,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727836139] [2022-12-14 07:32:19,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727836139] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:19,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:19,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881541287] [2022-12-14 07:32:19,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:19,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:32:19,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:32:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:32:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:19,181 INFO L87 Difference]: Start difference. First operand 146691 states and 739193 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:20,922 INFO L93 Difference]: Finished difference Result 150219 states and 756067 transitions. [2022-12-14 07:32:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:32:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 07:32:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:21,800 INFO L225 Difference]: With dead ends: 150219 [2022-12-14 07:32:21,800 INFO L226 Difference]: Without dead ends: 150219 [2022-12-14 07:32:21,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:21,801 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:21,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:32:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150219 states. [2022-12-14 07:32:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150219 to 141231. [2022-12-14 07:32:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141231 states, 141215 states have (on average 5.038466168608151) internal successors, (711507), 141230 states have internal predecessors, (711507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141231 states to 141231 states and 711507 transitions. [2022-12-14 07:32:26,773 INFO L78 Accepts]: Start accepts. Automaton has 141231 states and 711507 transitions. Word has length 19 [2022-12-14 07:32:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:26,773 INFO L495 AbstractCegarLoop]: Abstraction has 141231 states and 711507 transitions. [2022-12-14 07:32:26,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 141231 states and 711507 transitions. [2022-12-14 07:32:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 07:32:26,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:26,780 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:26,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:32:26,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 07:32:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash -934547077, now seen corresponding path program 1 times [2022-12-14 07:32:26,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:32:26,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883948162] [2022-12-14 07:32:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:26,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:32:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:32:26,792 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:32:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:32:26,805 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:32:26,805 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:32:26,805 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-14 07:32:26,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-14 07:32:26,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-14 07:32:26,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-14 07:32:26,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-14 07:32:26,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-14 07:32:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:32:26,806 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:26,807 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:32:26,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-14 07:32:26,824 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:32:26,827 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:32:26,827 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 236 transitions, 517 flow [2022-12-14 07:32:26,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 236 transitions, 517 flow [2022-12-14 07:32:26,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 236 transitions, 517 flow [2022-12-14 07:32:26,878 INFO L130 PetriNetUnfolder]: 27/304 cut-off events. [2022-12-14 07:32:26,878 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-14 07:32:26,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 304 events. 27/304 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 909 event pairs, 0 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 266. Up to 12 conditions per place. [2022-12-14 07:32:26,891 INFO L119 LiptonReduction]: Number of co-enabled transitions 32040 [2022-12-14 07:32:29,671 INFO L134 LiptonReduction]: Checked pairs total: 81015 [2022-12-14 07:32:29,671 INFO L136 LiptonReduction]: Total number of compositions: 213 [2022-12-14 07:32:29,672 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 74 places, 74 transitions, 193 flow