./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS --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 d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d --- 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-8393723 [2022-11-19 08:27:32,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:27:32,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:27:32,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:27:32,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:27:32,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:27:32,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:27:32,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:27:32,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:27:32,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:27:32,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:27:32,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:27:32,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:27:32,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:27:32,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:27:32,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:27:32,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:27:32,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:27:32,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:27:32,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:27:32,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:27:32,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:27:32,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:27:32,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:27:32,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:27:32,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:27:32,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:27:32,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:27:32,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:27:32,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:27:32,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:27:32,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:27:32,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:27:32,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:27:32,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:27:32,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:27:32,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:27:32,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:27:32,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:27:32,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:27:32,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:27:32,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:27:32,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:27:32,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:27:32,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:27:32,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:27:32,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:27:32,623 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:27:32,623 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:27:32,623 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:27:32,623 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:27:32,624 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:27:32,624 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:27:32,624 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:27:32,624 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:27:32,625 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:27:32,625 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:27:32,625 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:27:32,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:27:32,626 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:27:32,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:27:32,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:27:32,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:27:32,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:27:32,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:27:32,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:27:32,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:27:32,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:27:32,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:27:32,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:27:32,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:27:32,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:27:32,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:27:32,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:27:32,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:27:32,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:27:32,631 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:27:32,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:27:32,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:27:32,632 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:27:32,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:27:32,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:27:32,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:27:32,633 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_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d [2022-11-19 08:27:32,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:27:33,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:27:33,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:27:33,013 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:27:33,014 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:27:33,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2022-11-19 08:27:33,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/data/cbbd4a9f3/d516136cfd804f97b0d30fd4ce782efa/FLAGcd052a528 [2022-11-19 08:27:33,684 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:27:33,685 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2022-11-19 08:27:33,698 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/data/cbbd4a9f3/d516136cfd804f97b0d30fd4ce782efa/FLAGcd052a528 [2022-11-19 08:27:34,036 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/data/cbbd4a9f3/d516136cfd804f97b0d30fd4ce782efa [2022-11-19 08:27:34,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:27:34,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:27:34,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:27:34,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:27:34,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:27:34,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1435ffcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34, skipping insertion in model container [2022-11-19 08:27:34,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:27:34,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:27:34,413 WARN L234 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_598aec3c-63c8-4616-88c0-65473f8fac90/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2022-11-19 08:27:34,510 WARN L234 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_598aec3c-63c8-4616-88c0-65473f8fac90/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2022-11-19 08:27:34,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:27:34,605 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:27:34,626 WARN L234 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_598aec3c-63c8-4616-88c0-65473f8fac90/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2022-11-19 08:27:34,665 WARN L234 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_598aec3c-63c8-4616-88c0-65473f8fac90/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2022-11-19 08:27:34,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:27:34,718 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:27:34,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34 WrapperNode [2022-11-19 08:27:34,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:27:34,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:27:34,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:27:34,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:27:34,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,780 INFO L138 Inliner]: procedures = 55, calls = 61, calls flagged for inlining = 23, calls inlined = 23, statements flattened = 407 [2022-11-19 08:27:34,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:27:34,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:27:34,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:27:34,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:27:34,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:27:34,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:27:34,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:27:34,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:27:34,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (1/1) ... [2022-11-19 08:27:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:27:34,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:34,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:27:34,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:27:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:27:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:27:34,952 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:27:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 08:27:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 08:27:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 08:27:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 08:27:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 08:27:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 08:27:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 08:27:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 08:27:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 08:27:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 08:27:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 08:27:34,958 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 08:27:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 08:27:34,958 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 08:27:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 08:27:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 08:27:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 08:27:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 08:27:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 08:27:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 08:27:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:27:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 08:27:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 08:27:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 08:27:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 08:27:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:27:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:27:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 08:27:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 08:27:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 08:27:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 08:27:35,096 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:27:35,099 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:27:35,831 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:27:36,167 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:27:36,167 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-19 08:27:36,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:27:36 BoogieIcfgContainer [2022-11-19 08:27:36,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:27:36,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:27:36,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:27:36,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:27:36,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:27:34" (1/3) ... [2022-11-19 08:27:36,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27503005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:27:36, skipping insertion in model container [2022-11-19 08:27:36,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:34" (2/3) ... [2022-11-19 08:27:36,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27503005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:27:36, skipping insertion in model container [2022-11-19 08:27:36,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:27:36" (3/3) ... [2022-11-19 08:27:36,186 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2022-11-19 08:27:36,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:27:36,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:27:36,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:27:36,281 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;@8793af0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:27:36,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:27:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 96 states have (on average 1.4895833333333333) internal successors, (143), 104 states have internal predecessors, (143), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-19 08:27:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 08:27:36,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:36,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:36,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash -116487409, now seen corresponding path program 1 times [2022-11-19 08:27:36,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:36,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13902512] [2022-11-19 08:27:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:36,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:36,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:36,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13902512] [2022-11-19 08:27:36,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13902512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:36,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:27:36,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:27:36,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557195216] [2022-11-19 08:27:36,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:36,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:27:36,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:27:36,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:27:36,913 INFO L87 Difference]: Start difference. First operand has 145 states, 96 states have (on average 1.4895833333333333) internal successors, (143), 104 states have internal predecessors, (143), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:27:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:37,979 INFO L93 Difference]: Finished difference Result 507 states and 738 transitions. [2022-11-19 08:27:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:27:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-11-19 08:27:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:38,015 INFO L225 Difference]: With dead ends: 507 [2022-11-19 08:27:38,015 INFO L226 Difference]: Without dead ends: 357 [2022-11-19 08:27:38,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:27:38,032 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 441 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:38,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 519 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:27:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-19 08:27:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 344. [2022-11-19 08:27:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 233 states have (on average 1.3433476394849786) internal successors, (313), 241 states have internal predecessors, (313), 72 states have call successors, (72), 39 states have call predecessors, (72), 37 states have return successors, (86), 65 states have call predecessors, (86), 68 states have call successors, (86) [2022-11-19 08:27:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 471 transitions. [2022-11-19 08:27:38,184 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 471 transitions. Word has length 35 [2022-11-19 08:27:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:38,185 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 471 transitions. [2022-11-19 08:27:38,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:27:38,186 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 471 transitions. [2022-11-19 08:27:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:27:38,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:38,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:38,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:27:38,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2094405935, now seen corresponding path program 1 times [2022-11-19 08:27:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:38,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883829884] [2022-11-19 08:27:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:38,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:38,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883829884] [2022-11-19 08:27:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883829884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:38,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:27:38,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:27:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891430842] [2022-11-19 08:27:38,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:27:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:27:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:27:38,372 INFO L87 Difference]: Start difference. First operand 344 states and 471 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:27:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:39,415 INFO L93 Difference]: Finished difference Result 819 states and 1101 transitions. [2022-11-19 08:27:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:27:39,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 08:27:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:39,436 INFO L225 Difference]: With dead ends: 819 [2022-11-19 08:27:39,437 INFO L226 Difference]: Without dead ends: 755 [2022-11-19 08:27:39,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:27:39,444 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 699 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:39,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 769 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:27:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-19 08:27:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 684. [2022-11-19 08:27:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 470 states have (on average 1.3021276595744682) internal successors, (612), 478 states have internal predecessors, (612), 127 states have call successors, (127), 87 states have call predecessors, (127), 85 states have return successors, (156), 120 states have call predecessors, (156), 123 states have call successors, (156) [2022-11-19 08:27:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 895 transitions. [2022-11-19 08:27:39,626 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 895 transitions. Word has length 45 [2022-11-19 08:27:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:39,627 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 895 transitions. [2022-11-19 08:27:39,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:27:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 895 transitions. [2022-11-19 08:27:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:27:39,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:39,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:39,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:27:39,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1493825853, now seen corresponding path program 1 times [2022-11-19 08:27:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:39,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692608722] [2022-11-19 08:27:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:39,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:39,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692608722] [2022-11-19 08:27:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692608722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:39,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:27:39,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:27:39,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200455508] [2022-11-19 08:27:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:39,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:27:39,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:27:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:27:39,886 INFO L87 Difference]: Start difference. First operand 684 states and 895 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:27:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:40,731 INFO L93 Difference]: Finished difference Result 1445 states and 1842 transitions. [2022-11-19 08:27:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:27:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-19 08:27:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:40,742 INFO L225 Difference]: With dead ends: 1445 [2022-11-19 08:27:40,743 INFO L226 Difference]: Without dead ends: 1042 [2022-11-19 08:27:40,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:27:40,755 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 296 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:40,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 505 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:27:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-11-19 08:27:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1013. [2022-11-19 08:27:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 693 states have (on average 1.274170274170274) internal successors, (883), 702 states have internal predecessors, (883), 183 states have call successors, (183), 135 states have call predecessors, (183), 135 states have return successors, (230), 177 states have call predecessors, (230), 179 states have call successors, (230) [2022-11-19 08:27:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1296 transitions. [2022-11-19 08:27:40,939 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1296 transitions. Word has length 46 [2022-11-19 08:27:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:40,940 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1296 transitions. [2022-11-19 08:27:40,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:27:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1296 transitions. [2022-11-19 08:27:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:27:40,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:40,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:40,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:27:40,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1619350280, now seen corresponding path program 1 times [2022-11-19 08:27:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:40,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595455250] [2022-11-19 08:27:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:40,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:41,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595455250] [2022-11-19 08:27:41,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595455250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:41,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:27:41,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:27:41,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464166087] [2022-11-19 08:27:41,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:27:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:27:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:27:41,092 INFO L87 Difference]: Start difference. First operand 1013 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:27:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:41,335 INFO L93 Difference]: Finished difference Result 1954 states and 2455 transitions. [2022-11-19 08:27:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:27:41,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 08:27:41,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:41,344 INFO L225 Difference]: With dead ends: 1954 [2022-11-19 08:27:41,344 INFO L226 Difference]: Without dead ends: 1272 [2022-11-19 08:27:41,347 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 [2022-11-19 08:27:41,348 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 68 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:41,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 307 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:27:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-11-19 08:27:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1250. [2022-11-19 08:27:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 854 states have (on average 1.2611241217798594) internal successors, (1077), 863 states have internal predecessors, (1077), 225 states have call successors, (225), 173 states have call predecessors, (225), 169 states have return successors, (276), 215 states have call predecessors, (276), 221 states have call successors, (276) [2022-11-19 08:27:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1578 transitions. [2022-11-19 08:27:41,567 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1578 transitions. Word has length 47 [2022-11-19 08:27:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:41,570 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1578 transitions. [2022-11-19 08:27:41,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:27:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1578 transitions. [2022-11-19 08:27:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 08:27:41,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:41,573 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:41,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:27:41,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:41,578 INFO L85 PathProgramCache]: Analyzing trace with hash -499984110, now seen corresponding path program 1 times [2022-11-19 08:27:41,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:41,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967592837] [2022-11-19 08:27:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:41,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:27:41,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967592837] [2022-11-19 08:27:41,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967592837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:41,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:27:41,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:27:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687829801] [2022-11-19 08:27:41,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:27:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:27:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:27:41,700 INFO L87 Difference]: Start difference. First operand 1250 states and 1578 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:27:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:41,892 INFO L93 Difference]: Finished difference Result 1656 states and 2068 transitions. [2022-11-19 08:27:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:27:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-19 08:27:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:41,900 INFO L225 Difference]: With dead ends: 1656 [2022-11-19 08:27:41,900 INFO L226 Difference]: Without dead ends: 1101 [2022-11-19 08:27:41,902 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 [2022-11-19 08:27:41,903 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 157 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:41,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 231 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:27:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-11-19 08:27:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 895. [2022-11-19 08:27:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 618 states have (on average 1.2524271844660195) internal successors, (774), 626 states have internal predecessors, (774), 162 states have call successors, (162), 119 states have call predecessors, (162), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2022-11-19 08:27:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1120 transitions. [2022-11-19 08:27:42,026 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1120 transitions. Word has length 53 [2022-11-19 08:27:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:42,027 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1120 transitions. [2022-11-19 08:27:42,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:27:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1120 transitions. [2022-11-19 08:27:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:27:42,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:42,029 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:27:42,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -954323103, now seen corresponding path program 1 times [2022-11-19 08:27:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:42,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554386146] [2022-11-19 08:27:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:42,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:42,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554386146] [2022-11-19 08:27:42,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554386146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:42,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:27:42,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:27:42,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726207947] [2022-11-19 08:27:42,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:42,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:27:42,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:27:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:27:42,114 INFO L87 Difference]: Start difference. First operand 895 states and 1120 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:27:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:42,474 INFO L93 Difference]: Finished difference Result 1150 states and 1421 transitions. [2022-11-19 08:27:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:27:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 08:27:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:42,482 INFO L225 Difference]: With dead ends: 1150 [2022-11-19 08:27:42,482 INFO L226 Difference]: Without dead ends: 1147 [2022-11-19 08:27:42,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:27:42,484 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 293 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:42,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 210 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:27:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-19 08:27:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 894. [2022-11-19 08:27:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 618 states have (on average 1.2427184466019416) internal successors, (768), 625 states have internal predecessors, (768), 161 states have call successors, (161), 119 states have call predecessors, (161), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2022-11-19 08:27:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1113 transitions. [2022-11-19 08:27:42,596 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1113 transitions. Word has length 54 [2022-11-19 08:27:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:42,596 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1113 transitions. [2022-11-19 08:27:42,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:27:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1113 transitions. [2022-11-19 08:27:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:27:42,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:42,599 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:27:42,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 480100465, now seen corresponding path program 1 times [2022-11-19 08:27:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:42,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746578954] [2022-11-19 08:27:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:42,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746578954] [2022-11-19 08:27:42,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746578954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:27:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380483656] [2022-11-19 08:27:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:42,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:42,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:27:42,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:27:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:42,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:27:42,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:27:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:43,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:27:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:43,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380483656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:27:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870514158] [2022-11-19 08:27:43,774 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:27:43,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:27:43,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:27:43,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:27:43,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:27:45,660 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 95 for LOIs [2022-11-19 08:27:45,682 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 91 for LOIs [2022-11-19 08:27:45,700 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 99 for LOIs [2022-11-19 08:27:46,059 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 95 for LOIs [2022-11-19 08:27:46,108 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 95 for LOIs [2022-11-19 08:27:46,157 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 95 for LOIs [2022-11-19 08:27:46,177 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 102 for LOIs [2022-11-19 08:27:46,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:27:56,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1870514158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:27:56,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:27:56,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2022-11-19 08:27:56,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355477125] [2022-11-19 08:27:56,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:27:56,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 08:27:56,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 08:27:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 08:27:56,808 INFO L87 Difference]: Start difference. First operand 894 states and 1113 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:28:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:13,434 INFO L93 Difference]: Finished difference Result 1555 states and 1887 transitions. [2022-11-19 08:28:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 08:28:13,435 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-19 08:28:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:13,440 INFO L225 Difference]: With dead ends: 1555 [2022-11-19 08:28:13,440 INFO L226 Difference]: Without dead ends: 942 [2022-11-19 08:28:13,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 08:28:13,448 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 175 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:13,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1764 Invalid, 3059 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [184 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-19 08:28:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-11-19 08:28:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 927. [2022-11-19 08:28:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 643 states have (on average 1.234836702954899) internal successors, (794), 650 states have internal predecessors, (794), 163 states have call successors, (163), 125 states have call predecessors, (163), 119 states have return successors, (186), 153 states have call predecessors, (186), 160 states have call successors, (186) [2022-11-19 08:28:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1143 transitions. [2022-11-19 08:28:13,607 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1143 transitions. Word has length 55 [2022-11-19 08:28:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:13,608 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1143 transitions. [2022-11-19 08:28:13,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:28:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1143 transitions. [2022-11-19 08:28:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 08:28:13,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:13,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:13,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:13,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:13,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:13,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1834873832, now seen corresponding path program 1 times [2022-11-19 08:28:13,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:13,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666588005] [2022-11-19 08:28:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:13,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:28:14,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:14,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666588005] [2022-11-19 08:28:14,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666588005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:14,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:14,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:28:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128728942] [2022-11-19 08:28:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:28:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:28:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:28:14,153 INFO L87 Difference]: Start difference. First operand 927 states and 1143 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:28:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:14,726 INFO L93 Difference]: Finished difference Result 1359 states and 1757 transitions. [2022-11-19 08:28:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:28:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2022-11-19 08:28:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:14,733 INFO L225 Difference]: With dead ends: 1359 [2022-11-19 08:28:14,733 INFO L226 Difference]: Without dead ends: 1090 [2022-11-19 08:28:14,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:28:14,735 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 269 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:14,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 348 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:28:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-11-19 08:28:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1074. [2022-11-19 08:28:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 742 states have (on average 1.2371967654986522) internal successors, (918), 751 states have internal predecessors, (918), 193 states have call successors, (193), 143 states have call predecessors, (193), 137 states have return successors, (228), 181 states have call predecessors, (228), 190 states have call successors, (228) [2022-11-19 08:28:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1339 transitions. [2022-11-19 08:28:14,911 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1339 transitions. Word has length 60 [2022-11-19 08:28:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:14,911 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1339 transitions. [2022-11-19 08:28:14,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:28:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1339 transitions. [2022-11-19 08:28:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:28:14,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:14,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:14,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:28:14,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1254951842, now seen corresponding path program 1 times [2022-11-19 08:28:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:14,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558944736] [2022-11-19 08:28:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:28:15,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558944736] [2022-11-19 08:28:15,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558944736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:15,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:15,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:15,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733673019] [2022-11-19 08:28:15,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:15,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:15,011 INFO L87 Difference]: Start difference. First operand 1074 states and 1339 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:15,266 INFO L93 Difference]: Finished difference Result 1526 states and 1965 transitions. [2022-11-19 08:28:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:15,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-19 08:28:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:15,274 INFO L225 Difference]: With dead ends: 1526 [2022-11-19 08:28:15,274 INFO L226 Difference]: Without dead ends: 1161 [2022-11-19 08:28:15,277 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 [2022-11-19 08:28:15,280 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 28 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:15,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 337 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-11-19 08:28:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1105. [2022-11-19 08:28:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 767 states have (on average 1.242503259452412) internal successors, (953), 776 states have internal predecessors, (953), 196 states have call successors, (196), 146 states have call predecessors, (196), 140 states have return successors, (231), 184 states have call predecessors, (231), 193 states have call successors, (231) [2022-11-19 08:28:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1380 transitions. [2022-11-19 08:28:15,465 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1380 transitions. Word has length 61 [2022-11-19 08:28:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:15,467 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1380 transitions. [2022-11-19 08:28:15,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1380 transitions. [2022-11-19 08:28:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:28:15,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:15,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:15,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:28:15,472 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1585595164, now seen corresponding path program 1 times [2022-11-19 08:28:15,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:15,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776340323] [2022-11-19 08:28:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:28:15,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:15,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776340323] [2022-11-19 08:28:15,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776340323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:15,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:15,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:15,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286944219] [2022-11-19 08:28:15,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:15,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:15,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:15,534 INFO L87 Difference]: Start difference. First operand 1105 states and 1380 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:15,809 INFO L93 Difference]: Finished difference Result 1687 states and 2063 transitions. [2022-11-19 08:28:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-19 08:28:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:15,818 INFO L225 Difference]: With dead ends: 1687 [2022-11-19 08:28:15,818 INFO L226 Difference]: Without dead ends: 1314 [2022-11-19 08:28:15,820 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 [2022-11-19 08:28:15,821 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 43 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:15,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 344 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2022-11-19 08:28:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1226. [2022-11-19 08:28:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 848 states have (on average 1.2334905660377358) internal successors, (1046), 861 states have internal predecessors, (1046), 218 states have call successors, (218), 168 states have call predecessors, (218), 158 states have return successors, (253), 198 states have call predecessors, (253), 215 states have call successors, (253) [2022-11-19 08:28:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1517 transitions. [2022-11-19 08:28:16,038 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1517 transitions. Word has length 61 [2022-11-19 08:28:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:16,039 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 1517 transitions. [2022-11-19 08:28:16,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1517 transitions. [2022-11-19 08:28:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 08:28:16,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:16,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:16,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:28:16,042 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:16,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:16,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2067861852, now seen corresponding path program 1 times [2022-11-19 08:28:16,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:16,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603654771] [2022-11-19 08:28:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:16,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:28:16,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603654771] [2022-11-19 08:28:16,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603654771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:16,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:16,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:28:16,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92700304] [2022-11-19 08:28:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:16,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:28:16,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:28:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:28:16,239 INFO L87 Difference]: Start difference. First operand 1226 states and 1517 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:28:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:17,183 INFO L93 Difference]: Finished difference Result 2223 states and 2677 transitions. [2022-11-19 08:28:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:28:17,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-19 08:28:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:17,192 INFO L225 Difference]: With dead ends: 2223 [2022-11-19 08:28:17,193 INFO L226 Difference]: Without dead ends: 1537 [2022-11-19 08:28:17,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:28:17,196 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 275 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:17,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 548 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:28:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-11-19 08:28:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1406. [2022-11-19 08:28:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 968 states have (on average 1.2138429752066116) internal successors, (1175), 981 states have internal predecessors, (1175), 250 states have call successors, (250), 196 states have call predecessors, (250), 186 states have return successors, (285), 230 states have call predecessors, (285), 247 states have call successors, (285) [2022-11-19 08:28:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 1710 transitions. [2022-11-19 08:28:17,435 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 1710 transitions. Word has length 63 [2022-11-19 08:28:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:17,435 INFO L495 AbstractCegarLoop]: Abstraction has 1406 states and 1710 transitions. [2022-11-19 08:28:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:28:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 1710 transitions. [2022-11-19 08:28:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:28:17,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:17,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:17,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:28:17,438 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash 263376156, now seen corresponding path program 1 times [2022-11-19 08:28:17,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:17,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141831283] [2022-11-19 08:28:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:28:17,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:17,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141831283] [2022-11-19 08:28:17,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141831283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:28:17,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216638704] [2022-11-19 08:28:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:17,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:17,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:17,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:28:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:17,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:28:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:28:18,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:28:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:28:18,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216638704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:28:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678091523] [2022-11-19 08:28:18,294 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:28:18,294 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:28:18,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:28:18,295 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:28:18,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:28:21,708 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 95 for LOIs [2022-11-19 08:28:21,726 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 61 for LOIs [2022-11-19 08:28:21,733 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 97 for LOIs [2022-11-19 08:28:21,763 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 99 for LOIs [2022-11-19 08:28:22,008 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 95 for LOIs [2022-11-19 08:28:22,046 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 95 for LOIs [2022-11-19 08:28:22,071 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 95 for LOIs [2022-11-19 08:28:22,085 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 102 for LOIs [2022-11-19 08:28:22,103 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:28:32,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40698#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= 1 ~c_dr_i~0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:28:32,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:28:32,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:28:32,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 08:28:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095483150] [2022-11-19 08:28:32,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:28:32,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:28:32,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:28:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:28:32,938 INFO L87 Difference]: Start difference. First operand 1406 states and 1710 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 08:28:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:34,028 INFO L93 Difference]: Finished difference Result 3613 states and 4239 transitions. [2022-11-19 08:28:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:28:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-19 08:28:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:34,059 INFO L225 Difference]: With dead ends: 3613 [2022-11-19 08:28:34,060 INFO L226 Difference]: Without dead ends: 3610 [2022-11-19 08:28:34,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:28:34,064 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 450 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:34,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 692 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:28:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2022-11-19 08:28:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2721. [2022-11-19 08:28:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 1860 states have (on average 1.1919354838709677) internal successors, (2217), 1881 states have internal predecessors, (2217), 477 states have call successors, (477), 400 states have call predecessors, (477), 382 states have return successors, (524), 441 states have call predecessors, (524), 474 states have call successors, (524) [2022-11-19 08:28:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3218 transitions. [2022-11-19 08:28:34,601 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3218 transitions. Word has length 64 [2022-11-19 08:28:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:34,602 INFO L495 AbstractCegarLoop]: Abstraction has 2721 states and 3218 transitions. [2022-11-19 08:28:34,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 08:28:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3218 transitions. [2022-11-19 08:28:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:28:34,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:34,605 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:34,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:34,812 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash 783056300, now seen corresponding path program 2 times [2022-11-19 08:28:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:34,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347449184] [2022-11-19 08:28:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:28:34,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:34,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347449184] [2022-11-19 08:28:34,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347449184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:34,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:34,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673299156] [2022-11-19 08:28:34,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:34,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:34,859 INFO L87 Difference]: Start difference. First operand 2721 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:35,328 INFO L93 Difference]: Finished difference Result 3917 states and 4590 transitions. [2022-11-19 08:28:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-19 08:28:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:35,339 INFO L225 Difference]: With dead ends: 3917 [2022-11-19 08:28:35,340 INFO L226 Difference]: Without dead ends: 1979 [2022-11-19 08:28:35,344 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 [2022-11-19 08:28:35,345 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 162 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:35,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 269 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-19 08:28:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1963. [2022-11-19 08:28:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1354 states have (on average 1.1890694239290989) internal successors, (1610), 1367 states have internal predecessors, (1610), 341 states have call successors, (341), 276 states have call predecessors, (341), 266 states have return successors, (380), 321 states have call predecessors, (380), 338 states have call successors, (380) [2022-11-19 08:28:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2331 transitions. [2022-11-19 08:28:35,653 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2331 transitions. Word has length 67 [2022-11-19 08:28:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 1963 states and 2331 transitions. [2022-11-19 08:28:35,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2331 transitions. [2022-11-19 08:28:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 08:28:35,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:35,657 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:35,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:28:35,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -563929282, now seen corresponding path program 1 times [2022-11-19 08:28:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885812357] [2022-11-19 08:28:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:35,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:28:35,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:35,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885812357] [2022-11-19 08:28:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885812357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:35,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:35,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377696882] [2022-11-19 08:28:35,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:35,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:35,741 INFO L87 Difference]: Start difference. First operand 1963 states and 2331 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:36,269 INFO L93 Difference]: Finished difference Result 3560 states and 4159 transitions. [2022-11-19 08:28:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-19 08:28:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:36,281 INFO L225 Difference]: With dead ends: 3560 [2022-11-19 08:28:36,282 INFO L226 Difference]: Without dead ends: 2181 [2022-11-19 08:28:36,286 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 [2022-11-19 08:28:36,287 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 38 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:36,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 337 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-11-19 08:28:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2100. [2022-11-19 08:28:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 1451 states have (on average 1.1867677463818056) internal successors, (1722), 1470 states have internal predecessors, (1722), 362 states have call successors, (362), 297 states have call predecessors, (362), 285 states have return successors, (407), 334 states have call predecessors, (407), 359 states have call successors, (407) [2022-11-19 08:28:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2491 transitions. [2022-11-19 08:28:36,703 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2491 transitions. Word has length 71 [2022-11-19 08:28:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:36,704 INFO L495 AbstractCegarLoop]: Abstraction has 2100 states and 2491 transitions. [2022-11-19 08:28:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2491 transitions. [2022-11-19 08:28:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:28:36,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:36,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:28:36,708 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1311093219, now seen corresponding path program 1 times [2022-11-19 08:28:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:36,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461532679] [2022-11-19 08:28:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:28:36,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:36,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461532679] [2022-11-19 08:28:36,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461532679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:28:36,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935650096] [2022-11-19 08:28:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:36,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:36,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:36,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:36,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:28:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:37,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:28:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:28:37,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:37,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935650096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:37,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:28:37,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:28:37,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623675547] [2022-11-19 08:28:37,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:37,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:37,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:37,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:28:37,090 INFO L87 Difference]: Start difference. First operand 2100 states and 2491 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:28:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:37,436 INFO L93 Difference]: Finished difference Result 2510 states and 3056 transitions. [2022-11-19 08:28:37,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:37,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2022-11-19 08:28:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:37,448 INFO L225 Difference]: With dead ends: 2510 [2022-11-19 08:28:37,448 INFO L226 Difference]: Without dead ends: 2179 [2022-11-19 08:28:37,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:28:37,452 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 163 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:37,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 173 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2022-11-19 08:28:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 2164. [2022-11-19 08:28:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 1506 states have (on average 1.1872509960159363) internal successors, (1788), 1524 states have internal predecessors, (1788), 362 states have call successors, (362), 305 states have call predecessors, (362), 294 states have return successors, (405), 336 states have call predecessors, (405), 359 states have call successors, (405) [2022-11-19 08:28:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 2555 transitions. [2022-11-19 08:28:37,759 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 2555 transitions. Word has length 88 [2022-11-19 08:28:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:37,759 INFO L495 AbstractCegarLoop]: Abstraction has 2164 states and 2555 transitions. [2022-11-19 08:28:37,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:28:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 2555 transitions. [2022-11-19 08:28:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:28:37,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:37,763 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:37,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:28:37,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2010385118, now seen corresponding path program 2 times [2022-11-19 08:28:37,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:37,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202438865] [2022-11-19 08:28:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:37,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:28:38,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202438865] [2022-11-19 08:28:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202438865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:28:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417847349] [2022-11-19 08:28:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:28:38,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:38,202 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:38,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:28:38,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:28:38,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:28:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:28:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:38,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:38,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417847349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:38,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:28:38,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:28:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675873328] [2022-11-19 08:28:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:38,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:38,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:38,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:28:38,410 INFO L87 Difference]: Start difference. First operand 2164 states and 2555 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:28:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:38,807 INFO L93 Difference]: Finished difference Result 2654 states and 3242 transitions. [2022-11-19 08:28:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2022-11-19 08:28:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:38,820 INFO L225 Difference]: With dead ends: 2654 [2022-11-19 08:28:38,821 INFO L226 Difference]: Without dead ends: 2276 [2022-11-19 08:28:38,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:28:38,825 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 66 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:38,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 345 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2022-11-19 08:28:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2254. [2022-11-19 08:28:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 1574 states have (on average 1.187420584498094) internal successors, (1869), 1593 states have internal predecessors, (1869), 375 states have call successors, (375), 315 states have call predecessors, (375), 303 states have return successors, (428), 347 states have call predecessors, (428), 372 states have call successors, (428) [2022-11-19 08:28:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2672 transitions. [2022-11-19 08:28:39,187 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2672 transitions. Word has length 88 [2022-11-19 08:28:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:39,188 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 2672 transitions. [2022-11-19 08:28:39,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:28:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2672 transitions. [2022-11-19 08:28:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 08:28:39,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:39,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:39,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:39,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:28:39,398 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1519561268, now seen corresponding path program 1 times [2022-11-19 08:28:39,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245149660] [2022-11-19 08:28:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:28:39,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:39,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245149660] [2022-11-19 08:28:39,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245149660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:28:39,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397638229] [2022-11-19 08:28:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:39,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:39,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:39,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:39,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:28:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:39,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:28:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:39,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:39,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397638229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:39,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:28:39,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:28:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010282713] [2022-11-19 08:28:39,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:39,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:39,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:39,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:28:39,783 INFO L87 Difference]: Start difference. First operand 2254 states and 2672 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:28:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:40,307 INFO L93 Difference]: Finished difference Result 3073 states and 3744 transitions. [2022-11-19 08:28:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:40,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2022-11-19 08:28:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:40,321 INFO L225 Difference]: With dead ends: 3073 [2022-11-19 08:28:40,321 INFO L226 Difference]: Without dead ends: 2472 [2022-11-19 08:28:40,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:28:40,325 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 41 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:40,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 310 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2022-11-19 08:28:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2311. [2022-11-19 08:28:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1617 states have (on average 1.1904761904761905) internal successors, (1925), 1637 states have internal predecessors, (1925), 382 states have call successors, (382), 322 states have call predecessors, (382), 310 states have return successors, (435), 353 states have call predecessors, (435), 379 states have call successors, (435) [2022-11-19 08:28:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 2742 transitions. [2022-11-19 08:28:40,819 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 2742 transitions. Word has length 89 [2022-11-19 08:28:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:40,820 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 2742 transitions. [2022-11-19 08:28:40,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:28:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 2742 transitions. [2022-11-19 08:28:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 08:28:40,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:40,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:40,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:41,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:28:41,031 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1326912553, now seen corresponding path program 1 times [2022-11-19 08:28:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:41,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002083883] [2022-11-19 08:28:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:28:41,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002083883] [2022-11-19 08:28:41,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002083883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:28:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948699773] [2022-11-19 08:28:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:41,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:41,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:41,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:28:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:28:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:28:41,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948699773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:41,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:28:41,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:28:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798209799] [2022-11-19 08:28:41,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:28:41,332 INFO L87 Difference]: Start difference. First operand 2311 states and 2742 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:28:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:41,835 INFO L93 Difference]: Finished difference Result 2711 states and 3252 transitions. [2022-11-19 08:28:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:41,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 89 [2022-11-19 08:28:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:41,848 INFO L225 Difference]: With dead ends: 2711 [2022-11-19 08:28:41,849 INFO L226 Difference]: Without dead ends: 2415 [2022-11-19 08:28:41,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:28:41,852 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 43 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:41,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 342 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:28:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2022-11-19 08:28:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2345. [2022-11-19 08:28:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1643 states have (on average 1.1923311016433353) internal successors, (1959), 1663 states have internal predecessors, (1959), 386 states have call successors, (386), 326 states have call predecessors, (386), 314 states have return successors, (439), 357 states have call predecessors, (439), 383 states have call successors, (439) [2022-11-19 08:28:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 2784 transitions. [2022-11-19 08:28:42,448 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 2784 transitions. Word has length 89 [2022-11-19 08:28:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:42,449 INFO L495 AbstractCegarLoop]: Abstraction has 2345 states and 2784 transitions. [2022-11-19 08:28:42,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:28:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 2784 transitions. [2022-11-19 08:28:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 08:28:42,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:42,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:42,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 08:28:42,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:28:42,660 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash -320006360, now seen corresponding path program 1 times [2022-11-19 08:28:42,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:42,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98698886] [2022-11-19 08:28:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:42,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:28:42,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98698886] [2022-11-19 08:28:42,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98698886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:42,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:42,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:28:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251440991] [2022-11-19 08:28:42,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:42,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:28:42,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:28:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:28:42,806 INFO L87 Difference]: Start difference. First operand 2345 states and 2784 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:28:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:43,568 INFO L93 Difference]: Finished difference Result 3327 states and 4027 transitions. [2022-11-19 08:28:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:28:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 90 [2022-11-19 08:28:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:43,583 INFO L225 Difference]: With dead ends: 3327 [2022-11-19 08:28:43,583 INFO L226 Difference]: Without dead ends: 2826 [2022-11-19 08:28:43,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:28:43,587 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 227 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:43,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 372 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:28:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2022-11-19 08:28:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2785. [2022-11-19 08:28:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 1953 states have (on average 1.1976446492575525) internal successors, (2339), 1970 states have internal predecessors, (2339), 464 states have call successors, (464), 378 states have call predecessors, (464), 366 states have return successors, (515), 438 states have call predecessors, (515), 461 states have call successors, (515) [2022-11-19 08:28:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 3318 transitions. [2022-11-19 08:28:44,170 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 3318 transitions. Word has length 90 [2022-11-19 08:28:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:44,171 INFO L495 AbstractCegarLoop]: Abstraction has 2785 states and 3318 transitions. [2022-11-19 08:28:44,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:28:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 3318 transitions. [2022-11-19 08:28:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-19 08:28:44,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:44,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:44,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 08:28:44,179 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash 482877009, now seen corresponding path program 1 times [2022-11-19 08:28:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014196195] [2022-11-19 08:28:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:44,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:28:44,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:28:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:28:44,310 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:28:44,310 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:28:44,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-19 08:28:44,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-19 08:28:44,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 08:28:44,322 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:44,328 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:28:44,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:28:44 BoogieIcfgContainer [2022-11-19 08:28:44,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:28:44,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:28:44,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:28:44,472 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:28:44,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:27:36" (3/4) ... [2022-11-19 08:28:44,475 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 08:28:44,668 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:28:44,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:28:44,669 INFO L158 Benchmark]: Toolchain (without parser) took 70625.86ms. Allocated memory was 123.7MB in the beginning and 736.1MB in the end (delta: 612.4MB). Free memory was 85.6MB in the beginning and 578.7MB in the end (delta: -493.0MB). Peak memory consumption was 118.8MB. Max. memory is 16.1GB. [2022-11-19 08:28:44,669 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 123.7MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:28:44,669 INFO L158 Benchmark]: CACSL2BoogieTranslator took 669.21ms. Allocated memory is still 123.7MB. Free memory was 85.4MB in the beginning and 92.8MB in the end (delta: -7.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 08:28:44,675 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.46ms. Allocated memory is still 123.7MB. Free memory was 92.8MB in the beginning and 90.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:28:44,676 INFO L158 Benchmark]: Boogie Preprocessor took 44.69ms. Allocated memory is still 123.7MB. Free memory was 90.1MB in the beginning and 87.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:28:44,676 INFO L158 Benchmark]: RCFGBuilder took 1344.01ms. Allocated memory is still 123.7MB. Free memory was 87.6MB in the beginning and 87.3MB in the end (delta: 345.8kB). Peak memory consumption was 43.6MB. Max. memory is 16.1GB. [2022-11-19 08:28:44,677 INFO L158 Benchmark]: TraceAbstraction took 68297.58ms. Allocated memory was 123.7MB in the beginning and 736.1MB in the end (delta: 612.4MB). Free memory was 86.5MB in the beginning and 590.2MB in the end (delta: -503.7MB). Peak memory consumption was 111.2MB. Max. memory is 16.1GB. [2022-11-19 08:28:44,680 INFO L158 Benchmark]: Witness Printer took 196.74ms. Allocated memory is still 736.1MB. Free memory was 590.2MB in the beginning and 578.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:28:44,686 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 123.7MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 669.21ms. Allocated memory is still 123.7MB. Free memory was 85.4MB in the beginning and 92.8MB in the end (delta: -7.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.46ms. Allocated memory is still 123.7MB. Free memory was 92.8MB in the beginning and 90.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.69ms. Allocated memory is still 123.7MB. Free memory was 90.1MB in the beginning and 87.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1344.01ms. Allocated memory is still 123.7MB. Free memory was 87.6MB in the beginning and 87.3MB in the end (delta: 345.8kB). Peak memory consumption was 43.6MB. Max. memory is 16.1GB. * TraceAbstraction took 68297.58ms. Allocated memory was 123.7MB in the beginning and 736.1MB in the end (delta: 612.4MB). Free memory was 86.5MB in the beginning and 590.2MB in the end (delta: -503.7MB). Peak memory consumption was 111.2MB. Max. memory is 16.1GB. * Witness Printer took 196.74ms. Allocated memory is still 736.1MB. Free memory was 590.2MB in the beginning and 578.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 496]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L502] int m_st ; [L34] int q_free ; [L507] int T1_E = 2; [L35] int q_read_ev ; [L37] int q_req_up ; [L38] int q_ev ; [L66] int c_dr_st ; [L68] int c_dr_i ; [L33] int q_buf_0 ; [L515] int local ; [L501] int t1_pc = 0; [L59] int p_num_write ; [L505] int t1_i ; [L506] int M_E = 2; [L508] int E_M = 2; [L504] int m_i ; [L172] static int a_t ; [L503] int t1_st ; [L36] int q_write_ev ; [L62] int p_dw_pc ; [L63] int p_dw_i ; [L513] int token ; [L61] int p_dw_st ; [L65] int c_last_read ; [L67] int c_dr_pc ; [L509] int E_1 = 2; [L500] int m_pc = 0; [L60] int p_last_write ; [L64] int c_num_read ; [L974] COND FALSE !(__VERIFIER_nondet_int()) [L977] CALL main2() [L961] int __retres1 ; [L965] CALL init_model2() [L876] m_i = 1 [L877] t1_i = 1 [L965] RET init_model2() [L966] CALL start_simulation2() [L902] int kernel_st ; [L903] int tmp ; [L904] int tmp___0 ; [L908] kernel_st = 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L909] FCALL update_channels2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L910] CALL init_threads2() [L658] COND TRUE m_i == 1 [L659] m_st = 0 [L663] COND TRUE t1_i == 1 [L664] t1_st = 0 [L910] RET init_threads2() [L911] CALL fire_delta_events2() VAL [\old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L747] COND FALSE !(M_E == 0) [L752] COND FALSE !(T1_E == 0) [L757] COND FALSE !(E_M == 0) [L762] COND FALSE !(E_1 == 0) [L911] RET fire_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L912] CALL activate_threads2() VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L612] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L622] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L628] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L631] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L641] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L912] RET activate_threads2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L913] CALL reset_delta_events2() VAL [\old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L775] COND FALSE !(M_E == 1) [L780] COND FALSE !(T1_E == 1) [L785] COND FALSE !(E_M == 1) [L790] COND FALSE !(E_1 == 1) [L913] RET reset_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L916] COND TRUE 1 [L919] kernel_st = 1 [L920] CALL eval2() [L694] int tmp ; VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L698] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L701] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L701] tmp = exists_runnable_thread2() [L703] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, tmp=1, token=0] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND FALSE !(\read(tmp_ndt_1)) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, tmp=1, tmp_ndt_1=0, token=0] [L722] COND TRUE t1_st == 0 [L723] int tmp_ndt_2; [L724] tmp_ndt_2 = __VERIFIER_nondet_int() [L725] COND TRUE \read(tmp_ndt_2) [L727] t1_st = 1 [L728] CALL transmit1() [L576] COND TRUE t1_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, token=0] [L587] COND TRUE 1 [L589] t1_pc = 1 [L590] t1_st = 2 [L728] RET transmit1() [L698] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=-1, token=0] [L701] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=-1, token=0] [L701] tmp = exists_runnable_thread2() [L703] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=-1, token=0] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND TRUE \read(tmp_ndt_1) [L713] m_st = 1 [L714] CALL master() [L518] int tmp_var = __VERIFIER_nondet_int(); [L520] COND TRUE m_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L531] COND TRUE 1 [L534] token = __VERIFIER_nondet_int() [L535] local = token [L536] E_1 = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L537] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L829] CALL activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L612] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L622] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L628] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L631] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L632] COND TRUE E_1 == 1 [L633] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND TRUE \read(tmp___0) [L816] t1_st = 0 [L829] RET activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, token=0] [L537] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L538] E_1 = 2 [L539] m_pc = 1 [L540] m_st = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L714] RET master() [L722] COND TRUE t1_st == 0 [L723] int tmp_ndt_2; [L724] tmp_ndt_2 = __VERIFIER_nondet_int() [L725] COND TRUE \read(tmp_ndt_2) [L727] t1_st = 1 [L728] CALL transmit1() [L576] COND FALSE !(t1_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=0] [L579] COND TRUE t1_pc == 1 [L595] token += 1 [L596] E_M = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L597] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L829] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L612] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L613] COND TRUE E_M == 1 [L614] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND TRUE \read(tmp) [L808] m_st = 0 [L813] CALL, EXPR is_transmit1_triggered() [L628] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L631] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L632] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L641] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L829] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L597] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L598] E_M = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L587] COND TRUE 1 [L589] t1_pc = 1 [L590] t1_st = 2 [L728] RET transmit1() [L698] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=-2, token=1] [L701] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=-2, token=1] [L701] tmp = exists_runnable_thread2() [L703] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=-2, token=1] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND TRUE \read(tmp_ndt_1) [L713] m_st = 1 [L714] CALL master() [L518] int tmp_var = __VERIFIER_nondet_int(); [L520] COND FALSE !(m_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L523] COND TRUE m_pc == 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L545] COND FALSE !(token != local + 1) [L550] COND TRUE tmp_var <= 5 [L551] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L556] COND TRUE tmp_var <= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L557] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L558] COND TRUE tmp_var == 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L559] CALL error2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L496] reach_error() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] - UnprovableResult [Line: 28]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 145 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 68.1s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 27.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4006 SdHoareTripleChecker+Valid, 9.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3934 mSDsluCounter, 8722 SdHoareTripleChecker+Invalid, 8.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5156 mSDsCounter, 1139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6408 IncrementalHoareTripleChecker+Invalid, 7547 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1139 mSolverCounterUnsat, 3566 mSDtfsCounter, 6408 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 887 GetRequests, 681 SyntacticMatches, 9 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 33.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2785occurred in iteration=19, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 2195 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1792 NumberOfCodeBlocks, 1757 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1791 ConstructedInterpolants, 0 QuantifiedInterpolants, 4254 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2020 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 27 InterpolantComputations, 17 PerfectInterpolantSequences, 521/592 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 54, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 59, TOOLS_POST_TIME: 0.8s, TOOLS_POST_CALL_APPLICATIONS: 25, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 102, TOOLS_QUANTIFIERELIM_TIME: 1.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 162, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.7s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 54, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 7, CALL_SUMMARIZER_OVERALL_TIME: 0.1s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 888, DAG_COMPRESSION_RETAINED_NODES: 150, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 08:28:44,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_598aec3c-63c8-4616-88c0-65473f8fac90/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE