./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:25:42,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:25:42,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:25:42,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:25:42,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:25:42,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:25:42,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:25:42,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:25:42,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:25:42,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:25:42,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:25:42,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:25:42,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:25:42,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:25:42,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:25:42,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:25:42,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:25:42,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:25:42,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:25:42,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:25:42,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:25:42,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:25:42,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:25:42,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:25:42,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:25:42,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:25:42,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:25:42,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:25:42,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:25:42,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:25:42,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:25:42,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:25:42,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:25:42,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:25:42,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:25:42,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:25:42,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:25:42,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:25:42,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:25:42,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:25:42,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:25:42,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:25:42,609 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:25:42,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:25:42,610 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:25:42,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:25:42,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:25:42,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:25:42,611 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:25:42,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:25:42,618 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:25:42,618 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:25:42,618 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:25:42,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:25:42,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:25:42,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:25:42,618 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:25:42,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:25:42,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:25:42,619 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:25:42,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:25:42,620 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:25:42,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:25:42,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:25:42,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:25:42,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:25:42,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:25:42,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:25:42,621 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:25:42,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:25:42,621 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:25:42,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:25:42,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:25:42,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:25:42,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:25:42,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:25:42,622 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:25:42,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:25:42,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:25:42,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:25:42,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:25:42,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:25:42,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:25:42,623 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_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2022-12-14 07:25:42,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:25:42,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:25:42,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:25:42,817 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:25:42,817 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:25:42,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-12-14 07:25:45,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:25:45,456 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:25:45,456 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-12-14 07:25:45,464 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/data/c7d3f81fb/1bd053b1ca394d6b947d49428b7571f0/FLAG55571e9a3 [2022-12-14 07:25:45,476 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/data/c7d3f81fb/1bd053b1ca394d6b947d49428b7571f0 [2022-12-14 07:25:45,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:25:45,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:25:45,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:25:45,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:25:45,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:25:45,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16641d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45, skipping insertion in model container [2022-12-14 07:25:45,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:25:45,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:25:45,628 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2022-12-14 07:25:45,657 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2022-12-14 07:25:45,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:25:45,691 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:25:45,700 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2022-12-14 07:25:45,711 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2022-12-14 07:25:45,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:25:45,739 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:25:45,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45 WrapperNode [2022-12-14 07:25:45,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:25:45,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:25:45,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:25:45,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:25:45,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,773 INFO L138 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2022-12-14 07:25:45,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:25:45,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:25:45,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:25:45,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:25:45,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:25:45,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:25:45,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:25:45,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:25:45,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (1/1) ... [2022-12-14 07:25:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:25:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:25:45,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:25:45,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:25:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:25:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 07:25:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 07:25:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-12-14 07:25:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-12-14 07:25:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 07:25:45,857 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 07:25:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 07:25:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 07:25:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 07:25:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 07:25:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 07:25:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 07:25:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 07:25:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 07:25:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:25:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 07:25:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 07:25:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:25:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:25:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 07:25:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 07:25:45,859 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 07:25:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 07:25:45,927 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:25:45,929 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:25:46,301 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:25:46,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:25:46,404 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 07:25:46,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:25:46 BoogieIcfgContainer [2022-12-14 07:25:46,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:25:46,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:25:46,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:25:46,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:25:46,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:25:45" (1/3) ... [2022-12-14 07:25:46,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7991a6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:25:46, skipping insertion in model container [2022-12-14 07:25:46,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:25:45" (2/3) ... [2022-12-14 07:25:46,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7991a6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:25:46, skipping insertion in model container [2022-12-14 07:25:46,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:25:46" (3/3) ... [2022-12-14 07:25:46,413 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-12-14 07:25:46,427 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:25:46,427 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 07:25:46,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:25:46,468 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;@414e05f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:25:46,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:25:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 98 states have (on average 1.5408163265306123) internal successors, (151), 105 states have internal predecessors, (151), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 07:25:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:25:46,478 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:46,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:46,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash -705778185, now seen corresponding path program 1 times [2022-12-14 07:25:46,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:46,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951989206] [2022-12-14 07:25:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:46,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:46,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951989206] [2022-12-14 07:25:46,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951989206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:46,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:46,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:25:46,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473592911] [2022-12-14 07:25:46,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:25:46,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:25:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:46,711 INFO L87 Difference]: Start difference. First operand has 135 states, 98 states have (on average 1.5408163265306123) internal successors, (151), 105 states have internal predecessors, (151), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:25:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:46,825 INFO L93 Difference]: Finished difference Result 302 states and 446 transitions. [2022-12-14 07:25:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:25:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 07:25:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:46,834 INFO L225 Difference]: With dead ends: 302 [2022-12-14 07:25:46,834 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 07:25:46,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:46,839 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:46,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 225 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:25:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 07:25:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-12-14 07:25:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 124 states have (on average 1.435483870967742) internal successors, (178), 128 states have internal predecessors, (178), 27 states have call successors, (27), 12 states have call predecessors, (27), 10 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 07:25:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 228 transitions. [2022-12-14 07:25:46,878 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 228 transitions. Word has length 28 [2022-12-14 07:25:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 228 transitions. [2022-12-14 07:25:46,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:25:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 228 transitions. [2022-12-14 07:25:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 07:25:46,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:46,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:46,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:25:46,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1671573042, now seen corresponding path program 1 times [2022-12-14 07:25:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:46,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386166293] [2022-12-14 07:25:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:46,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:46,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:46,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386166293] [2022-12-14 07:25:46,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386166293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:46,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:46,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:25:46,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411532072] [2022-12-14 07:25:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:46,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:25:46,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:25:46,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:46,932 INFO L87 Difference]: Start difference. First operand 163 states and 228 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:25:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:47,010 INFO L93 Difference]: Finished difference Result 319 states and 445 transitions. [2022-12-14 07:25:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:25:47,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-12-14 07:25:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:47,013 INFO L225 Difference]: With dead ends: 319 [2022-12-14 07:25:47,013 INFO L226 Difference]: Without dead ends: 238 [2022-12-14 07:25:47,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:47,015 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 162 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:47,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 210 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:25:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-14 07:25:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2022-12-14 07:25:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 184 states have (on average 1.4076086956521738) internal successors, (259), 188 states have internal predecessors, (259), 34 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 07:25:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 323 transitions. [2022-12-14 07:25:47,042 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 323 transitions. Word has length 29 [2022-12-14 07:25:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:47,043 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 323 transitions. [2022-12-14 07:25:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:25:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 323 transitions. [2022-12-14 07:25:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 07:25:47,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:47,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:47,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:25:47,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1266162579, now seen corresponding path program 1 times [2022-12-14 07:25:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:47,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351420799] [2022-12-14 07:25:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:47,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:47,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:47,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351420799] [2022-12-14 07:25:47,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351420799] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:47,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:47,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:25:47,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490046512] [2022-12-14 07:25:47,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:47,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:25:47,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:25:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:47,095 INFO L87 Difference]: Start difference. First operand 234 states and 323 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:25:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:47,168 INFO L93 Difference]: Finished difference Result 474 states and 651 transitions. [2022-12-14 07:25:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:25:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 07:25:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:47,172 INFO L225 Difference]: With dead ends: 474 [2022-12-14 07:25:47,172 INFO L226 Difference]: Without dead ends: 322 [2022-12-14 07:25:47,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:47,174 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 46 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:47,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 305 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:25:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-12-14 07:25:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 308. [2022-12-14 07:25:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 247 states have (on average 1.3927125506072875) internal successors, (344), 253 states have internal predecessors, (344), 40 states have call successors, (40), 21 states have call predecessors, (40), 19 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 07:25:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 420 transitions. [2022-12-14 07:25:47,194 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 420 transitions. Word has length 30 [2022-12-14 07:25:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:47,194 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 420 transitions. [2022-12-14 07:25:47,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:25:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 420 transitions. [2022-12-14 07:25:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 07:25:47,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:47,195 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] [2022-12-14 07:25:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:25:47,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash 677049678, now seen corresponding path program 1 times [2022-12-14 07:25:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:47,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114405795] [2022-12-14 07:25:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:47,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114405795] [2022-12-14 07:25:47,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114405795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:47,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:47,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:25:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817005390] [2022-12-14 07:25:47,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:47,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:25:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:25:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:25:47,263 INFO L87 Difference]: Start difference. First operand 308 states and 420 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:25:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:47,425 INFO L93 Difference]: Finished difference Result 448 states and 627 transitions. [2022-12-14 07:25:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:25:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 38 [2022-12-14 07:25:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:47,427 INFO L225 Difference]: With dead ends: 448 [2022-12-14 07:25:47,428 INFO L226 Difference]: Without dead ends: 372 [2022-12-14 07:25:47,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:25:47,429 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 248 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:47,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 366 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:25:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-12-14 07:25:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 371. [2022-12-14 07:25:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 292 states have (on average 1.3767123287671232) internal successors, (402), 299 states have internal predecessors, (402), 52 states have call successors, (52), 27 states have call predecessors, (52), 25 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 07:25:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 502 transitions. [2022-12-14 07:25:47,452 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 502 transitions. Word has length 38 [2022-12-14 07:25:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:47,452 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 502 transitions. [2022-12-14 07:25:47,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:25:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 502 transitions. [2022-12-14 07:25:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 07:25:47,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:47,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:47,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:25:47,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:47,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2050502916, now seen corresponding path program 1 times [2022-12-14 07:25:47,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:47,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129309696] [2022-12-14 07:25:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:25:47,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:47,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129309696] [2022-12-14 07:25:47,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129309696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:47,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:47,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:25:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281189003] [2022-12-14 07:25:47,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:47,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:25:47,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:25:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:47,499 INFO L87 Difference]: Start difference. First operand 371 states and 502 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:25:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:47,567 INFO L93 Difference]: Finished difference Result 534 states and 720 transitions. [2022-12-14 07:25:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:25:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-12-14 07:25:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:47,569 INFO L225 Difference]: With dead ends: 534 [2022-12-14 07:25:47,569 INFO L226 Difference]: Without dead ends: 376 [2022-12-14 07:25:47,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:47,571 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 32 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:47,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 335 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:25:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-12-14 07:25:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 365. [2022-12-14 07:25:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 286 states have (on average 1.3566433566433567) internal successors, (388), 293 states have internal predecessors, (388), 52 states have call successors, (52), 27 states have call predecessors, (52), 25 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 07:25:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 488 transitions. [2022-12-14 07:25:47,603 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 488 transitions. Word has length 43 [2022-12-14 07:25:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:47,603 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 488 transitions. [2022-12-14 07:25:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:25:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 488 transitions. [2022-12-14 07:25:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 07:25:47,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:47,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:47,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:25:47,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:47,606 INFO L85 PathProgramCache]: Analyzing trace with hash -577104267, now seen corresponding path program 1 times [2022-12-14 07:25:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:47,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540338778] [2022-12-14 07:25:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:47,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:25:47,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540338778] [2022-12-14 07:25:47,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540338778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:47,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:47,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:25:47,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692834646] [2022-12-14 07:25:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:25:47,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:25:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:47,650 INFO L87 Difference]: Start difference. First operand 365 states and 488 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:25:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:47,727 INFO L93 Difference]: Finished difference Result 614 states and 812 transitions. [2022-12-14 07:25:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:25:47,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-12-14 07:25:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:47,729 INFO L225 Difference]: With dead ends: 614 [2022-12-14 07:25:47,729 INFO L226 Difference]: Without dead ends: 411 [2022-12-14 07:25:47,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:47,731 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 147 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:47,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:25:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-12-14 07:25:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2022-12-14 07:25:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 325 states have (on average 1.3261538461538462) internal successors, (431), 332 states have internal predecessors, (431), 56 states have call successors, (56), 30 states have call predecessors, (56), 28 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-14 07:25:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 539 transitions. [2022-12-14 07:25:47,768 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 539 transitions. Word has length 46 [2022-12-14 07:25:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:47,768 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 539 transitions. [2022-12-14 07:25:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:25:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 539 transitions. [2022-12-14 07:25:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 07:25:47,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:47,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:47,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:25:47,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -629865777, now seen corresponding path program 1 times [2022-12-14 07:25:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761974378] [2022-12-14 07:25:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:25:47,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761974378] [2022-12-14 07:25:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761974378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:47,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:47,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:25:47,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944674472] [2022-12-14 07:25:47,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:47,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:25:47,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:25:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:25:47,821 INFO L87 Difference]: Start difference. First operand 411 states and 539 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:25:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:47,958 INFO L93 Difference]: Finished difference Result 638 states and 839 transitions. [2022-12-14 07:25:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:25:47,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-12-14 07:25:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:47,961 INFO L225 Difference]: With dead ends: 638 [2022-12-14 07:25:47,961 INFO L226 Difference]: Without dead ends: 409 [2022-12-14 07:25:47,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:25:47,962 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 202 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:47,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 314 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:25:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-12-14 07:25:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2022-12-14 07:25:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 321 states have (on average 1.2928348909657321) internal successors, (415), 328 states have internal predecessors, (415), 56 states have call successors, (56), 30 states have call predecessors, (56), 28 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-14 07:25:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 523 transitions. [2022-12-14 07:25:47,984 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 523 transitions. Word has length 47 [2022-12-14 07:25:47,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:47,984 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 523 transitions. [2022-12-14 07:25:47,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:25:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 523 transitions. [2022-12-14 07:25:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 07:25:47,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:47,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:47,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:25:47,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash 242972878, now seen corresponding path program 1 times [2022-12-14 07:25:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:47,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262491508] [2022-12-14 07:25:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:25:48,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:48,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262491508] [2022-12-14 07:25:48,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262491508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:48,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:48,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:25:48,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742768596] [2022-12-14 07:25:48,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:48,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:25:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:25:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:25:48,052 INFO L87 Difference]: Start difference. First operand 407 states and 523 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:25:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:48,188 INFO L93 Difference]: Finished difference Result 443 states and 564 transitions. [2022-12-14 07:25:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:25:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-12-14 07:25:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:48,191 INFO L225 Difference]: With dead ends: 443 [2022-12-14 07:25:48,191 INFO L226 Difference]: Without dead ends: 440 [2022-12-14 07:25:48,191 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 [2022-12-14 07:25:48,192 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 270 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:48,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 200 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:25:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-14 07:25:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 406. [2022-12-14 07:25:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 321 states have (on average 1.2866043613707165) internal successors, (413), 327 states have internal predecessors, (413), 55 states have call successors, (55), 30 states have call predecessors, (55), 28 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-14 07:25:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 520 transitions. [2022-12-14 07:25:48,224 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 520 transitions. Word has length 47 [2022-12-14 07:25:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:48,225 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 520 transitions. [2022-12-14 07:25:48,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:25:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 520 transitions. [2022-12-14 07:25:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 07:25:48,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:48,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:48,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:25:48,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1058462536, now seen corresponding path program 1 times [2022-12-14 07:25:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429698852] [2022-12-14 07:25:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:25:48,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:48,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429698852] [2022-12-14 07:25:48,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429698852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:25:48,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833104483] [2022-12-14 07:25:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:48,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:25:48,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:25:48,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:25:48,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:25:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:25:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:48,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:25:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:25:48,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833104483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:25:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451793857] [2022-12-14 07:25:48,792 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-12-14 07:25:48,792 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:25:48,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:25:48,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:25:48,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:25:50,094 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 85 for LOIs [2022-12-14 07:25:50,100 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 100 for LOIs [2022-12-14 07:25:50,107 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 216 for LOIs [2022-12-14 07:25:50,731 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:25:59,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9820#(and (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:25:59,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:25:59,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:25:59,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 07:25:59,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768802184] [2022-12-14 07:25:59,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:25:59,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:25:59,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:25:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:25:59,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 07:25:59,472 INFO L87 Difference]: Start difference. First operand 406 states and 520 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 07:25:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:59,740 INFO L93 Difference]: Finished difference Result 807 states and 1018 transitions. [2022-12-14 07:25:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:25:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-12-14 07:25:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:59,746 INFO L225 Difference]: With dead ends: 807 [2022-12-14 07:25:59,746 INFO L226 Difference]: Without dead ends: 804 [2022-12-14 07:25:59,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 07:25:59,747 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 348 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:59,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 741 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:25:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-12-14 07:25:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 605. [2022-12-14 07:25:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 488 states have (on average 1.278688524590164) internal successors, (624), 496 states have internal predecessors, (624), 74 states have call successors, (74), 43 states have call predecessors, (74), 41 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2022-12-14 07:25:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 769 transitions. [2022-12-14 07:25:59,781 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 769 transitions. Word has length 48 [2022-12-14 07:25:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:59,781 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 769 transitions. [2022-12-14 07:25:59,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 07:25:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 769 transitions. [2022-12-14 07:25:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 07:25:59,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:59,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-12-14 07:25:59,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:25:59,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:25:59,985 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:59,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1974185739, now seen corresponding path program 2 times [2022-12-14 07:25:59,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:59,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241942529] [2022-12-14 07:25:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:26:00,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:00,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241942529] [2022-12-14 07:26:00,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241942529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:00,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:26:00,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:26:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822495596] [2022-12-14 07:26:00,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:00,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:00,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:00,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:26:00,094 INFO L87 Difference]: Start difference. First operand 605 states and 769 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:26:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:00,211 INFO L93 Difference]: Finished difference Result 911 states and 1154 transitions. [2022-12-14 07:26:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-12-14 07:26:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:00,213 INFO L225 Difference]: With dead ends: 911 [2022-12-14 07:26:00,213 INFO L226 Difference]: Without dead ends: 549 [2022-12-14 07:26:00,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:26:00,214 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 158 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:00,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 216 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:26:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-12-14 07:26:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 546. [2022-12-14 07:26:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 439 states have (on average 1.2619589977220957) internal successors, (554), 448 states have internal predecessors, (554), 68 states have call successors, (68), 39 states have call predecessors, (68), 37 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-14 07:26:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 687 transitions. [2022-12-14 07:26:00,242 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 687 transitions. Word has length 61 [2022-12-14 07:26:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:00,242 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 687 transitions. [2022-12-14 07:26:00,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:26:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 687 transitions. [2022-12-14 07:26:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 07:26:00,243 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:00,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:00,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:26:00,244 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1424603152, now seen corresponding path program 1 times [2022-12-14 07:26:00,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:00,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124967641] [2022-12-14 07:26:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:26:00,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124967641] [2022-12-14 07:26:00,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124967641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123702149] [2022-12-14 07:26:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:00,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:00,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:00,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:26:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:26:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:26:00,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:00,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123702149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:00,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:00,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:26:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671295275] [2022-12-14 07:26:00,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:00,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:00,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:00,394 INFO L87 Difference]: Start difference. First operand 546 states and 687 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:26:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:00,478 INFO L93 Difference]: Finished difference Result 817 states and 1062 transitions. [2022-12-14 07:26:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:00,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-12-14 07:26:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:00,481 INFO L225 Difference]: With dead ends: 817 [2022-12-14 07:26:00,481 INFO L226 Difference]: Without dead ends: 678 [2022-12-14 07:26:00,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:00,482 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 152 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:00,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 270 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-12-14 07:26:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 672. [2022-12-14 07:26:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 531 states have (on average 1.2749529190207156) internal successors, (677), 541 states have internal predecessors, (677), 90 states have call successors, (90), 51 states have call predecessors, (90), 49 states have return successors, (87), 80 states have call predecessors, (87), 87 states have call successors, (87) [2022-12-14 07:26:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 854 transitions. [2022-12-14 07:26:00,539 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 854 transitions. Word has length 67 [2022-12-14 07:26:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:00,539 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 854 transitions. [2022-12-14 07:26:00,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:26:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 854 transitions. [2022-12-14 07:26:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 07:26:00,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:00,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:00,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 07:26:00,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:00,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1920008016, now seen corresponding path program 1 times [2022-12-14 07:26:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:00,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656314886] [2022-12-14 07:26:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:00,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 07:26:00,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656314886] [2022-12-14 07:26:00,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656314886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:00,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:26:00,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:26:00,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471088795] [2022-12-14 07:26:00,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:00,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:26:00,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:00,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:26:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:00,942 INFO L87 Difference]: Start difference. First operand 672 states and 854 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-12-14 07:26:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:01,184 INFO L93 Difference]: Finished difference Result 1074 states and 1397 transitions. [2022-12-14 07:26:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:26:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 67 [2022-12-14 07:26:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:01,187 INFO L225 Difference]: With dead ends: 1074 [2022-12-14 07:26:01,187 INFO L226 Difference]: Without dead ends: 810 [2022-12-14 07:26:01,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:26:01,188 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 289 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:01,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 397 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:26:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-12-14 07:26:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 794. [2022-12-14 07:26:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 619 states have (on average 1.2794830371567043) internal successors, (792), 630 states have internal predecessors, (792), 112 states have call successors, (112), 63 states have call predecessors, (112), 61 states have return successors, (109), 101 states have call predecessors, (109), 109 states have call successors, (109) [2022-12-14 07:26:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1013 transitions. [2022-12-14 07:26:01,234 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1013 transitions. Word has length 67 [2022-12-14 07:26:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:01,235 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1013 transitions. [2022-12-14 07:26:01,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-12-14 07:26:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1013 transitions. [2022-12-14 07:26:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 07:26:01,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:01,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:01,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:26:01,236 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:01,237 INFO L85 PathProgramCache]: Analyzing trace with hash 124710990, now seen corresponding path program 1 times [2022-12-14 07:26:01,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:01,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075574598] [2022-12-14 07:26:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:01,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 07:26:01,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:01,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075574598] [2022-12-14 07:26:01,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075574598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:01,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:26:01,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:26:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633096909] [2022-12-14 07:26:01,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:01,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:01,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:01,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:26:01,276 INFO L87 Difference]: Start difference. First operand 794 states and 1013 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:26:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:01,375 INFO L93 Difference]: Finished difference Result 1096 states and 1422 transitions. [2022-12-14 07:26:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 68 [2022-12-14 07:26:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:01,378 INFO L225 Difference]: With dead ends: 1096 [2022-12-14 07:26:01,378 INFO L226 Difference]: Without dead ends: 889 [2022-12-14 07:26:01,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:26:01,379 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 36 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:01,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 338 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-12-14 07:26:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 840. [2022-12-14 07:26:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 659 states have (on average 1.2943854324734445) internal successors, (853), 670 states have internal predecessors, (853), 115 states have call successors, (115), 66 states have call predecessors, (115), 64 states have return successors, (112), 104 states have call predecessors, (112), 112 states have call successors, (112) [2022-12-14 07:26:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1080 transitions. [2022-12-14 07:26:01,448 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1080 transitions. Word has length 68 [2022-12-14 07:26:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:01,449 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1080 transitions. [2022-12-14 07:26:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:26:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1080 transitions. [2022-12-14 07:26:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 07:26:01,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:01,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:01,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:26:01,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1283321388, now seen corresponding path program 1 times [2022-12-14 07:26:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345108752] [2022-12-14 07:26:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:01,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:26:01,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345108752] [2022-12-14 07:26:01,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345108752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947750285] [2022-12-14 07:26:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:01,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:01,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:01,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:01,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:26:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:26:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:26:01,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:01,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947750285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:01,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:01,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 07:26:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964431922] [2022-12-14 07:26:01,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:01,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:01,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:01,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:01,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:01,640 INFO L87 Difference]: Start difference. First operand 840 states and 1080 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:26:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:01,716 INFO L93 Difference]: Finished difference Result 934 states and 1194 transitions. [2022-12-14 07:26:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:01,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-12-14 07:26:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:01,718 INFO L225 Difference]: With dead ends: 934 [2022-12-14 07:26:01,718 INFO L226 Difference]: Without dead ends: 439 [2022-12-14 07:26:01,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:01,719 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 24 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:01,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 303 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-12-14 07:26:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2022-12-14 07:26:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 322 states have (on average 1.360248447204969) internal successors, (438), 327 states have internal predecessors, (438), 77 states have call successors, (77), 40 states have call predecessors, (77), 39 states have return successors, (75), 72 states have call predecessors, (75), 75 states have call successors, (75) [2022-12-14 07:26:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 590 transitions. [2022-12-14 07:26:01,746 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 590 transitions. Word has length 73 [2022-12-14 07:26:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:01,746 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 590 transitions. [2022-12-14 07:26:01,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:26:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 590 transitions. [2022-12-14 07:26:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 07:26:01,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:01,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:01,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:26:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 07:26:01,948 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash -30886600, now seen corresponding path program 1 times [2022-12-14 07:26:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:01,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601871047] [2022-12-14 07:26:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:26:02,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:02,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601871047] [2022-12-14 07:26:02,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601871047] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:02,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:26:02,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:26:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284589003] [2022-12-14 07:26:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:02,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:26:02,002 INFO L87 Difference]: Start difference. First operand 439 states and 590 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:26:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:02,118 INFO L93 Difference]: Finished difference Result 1277 states and 1729 transitions. [2022-12-14 07:26:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:02,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2022-12-14 07:26:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:02,121 INFO L225 Difference]: With dead ends: 1277 [2022-12-14 07:26:02,121 INFO L226 Difference]: Without dead ends: 844 [2022-12-14 07:26:02,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:26:02,122 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 83 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:02,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 189 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-12-14 07:26:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 831. [2022-12-14 07:26:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 610 states have (on average 1.3311475409836067) internal successors, (812), 618 states have internal predecessors, (812), 142 states have call successors, (142), 79 states have call predecessors, (142), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 07:26:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1094 transitions. [2022-12-14 07:26:02,175 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1094 transitions. Word has length 88 [2022-12-14 07:26:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:02,175 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1094 transitions. [2022-12-14 07:26:02,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:26:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1094 transitions. [2022-12-14 07:26:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 07:26:02,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:02,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:02,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:26:02,177 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash -65230276, now seen corresponding path program 1 times [2022-12-14 07:26:02,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:02,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362000138] [2022-12-14 07:26:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 07:26:02,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362000138] [2022-12-14 07:26:02,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362000138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51472422] [2022-12-14 07:26:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:02,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:02,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:02,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:26:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:26:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:26:02,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:02,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51472422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:02,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:02,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 07:26:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313994226] [2022-12-14 07:26:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:02,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:02,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:02,346 INFO L87 Difference]: Start difference. First operand 831 states and 1094 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:02,469 INFO L93 Difference]: Finished difference Result 1575 states and 2090 transitions. [2022-12-14 07:26:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:02,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 99 [2022-12-14 07:26:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:02,473 INFO L225 Difference]: With dead ends: 1575 [2022-12-14 07:26:02,473 INFO L226 Difference]: Without dead ends: 1023 [2022-12-14 07:26:02,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:02,474 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 58 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:02,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 233 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-12-14 07:26:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 907. [2022-12-14 07:26:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 674 states have (on average 1.3471810089020773) internal successors, (908), 682 states have internal predecessors, (908), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2022-12-14 07:26:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1202 transitions. [2022-12-14 07:26:02,532 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1202 transitions. Word has length 99 [2022-12-14 07:26:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:02,532 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1202 transitions. [2022-12-14 07:26:02,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1202 transitions. [2022-12-14 07:26:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 07:26:02,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:02,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:02,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:26:02,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:26:02,736 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash -262546117, now seen corresponding path program 2 times [2022-12-14 07:26:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:02,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764598728] [2022-12-14 07:26:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:02,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 07:26:03,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:03,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764598728] [2022-12-14 07:26:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764598728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704454849] [2022-12-14 07:26:03,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:26:03,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:03,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:03,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:03,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:26:03,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:26:03,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:26:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:26:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 07:26:03,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:26:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:26:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704454849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:26:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503649549] [2022-12-14 07:26:03,427 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2022-12-14 07:26:03,427 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:26:03,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:26:03,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:26:03,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:26:07,958 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 111 for LOIs [2022-12-14 07:26:07,972 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 112 for LOIs [2022-12-14 07:26:07,990 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:26:07,996 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:26:09,129 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 111 for LOIs [2022-12-14 07:26:09,149 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 100 for LOIs [2022-12-14 07:26:09,154 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 147 for LOIs [2022-12-14 07:26:09,940 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 107 for LOIs [2022-12-14 07:26:10,232 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 112 for LOIs [2022-12-14 07:26:10,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:26:20,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31789#(and (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~q_buf_0~0 0) (not (= ~token~0 (+ 2 ~local~0))) (<= 0 ~c_dr_pc~0) (<= ~c_num_read~0 0) (<= ~c_last_read~0 0) (<= ~p_dw_pc~0 0) (= ~p_last_write~0 0) (<= 0 ~p_dw_st~0) (<= 0 ~t2_pc~0) (<= 1 ~t1_i~0) (<= 0 ~p_dw_pc~0) (<= ~a_t~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= 0 ~p_dw_i~0) (<= ~p_dw_st~0 0) (<= ~t1_pc~0 0) (<= |#NULL.offset| 0) (= ~m_pc~0 1) (<= ~p_dw_i~0 0) (<= 1 ~m_i~0) (<= 0 ~a_t~0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (<= ~m_i~0 1) (= ~q_read_ev~0 0) (= ~m_st~0 1) (<= ~c_dr_pc~0 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 ~c_num_read~0) (<= ~t1_i~0 1) (<= 0 ~c_last_read~0) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 07:26:20,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:26:20,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:26:20,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-12-14 07:26:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780125648] [2022-12-14 07:26:20,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:26:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:26:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:20,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:26:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2830, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 07:26:20,369 INFO L87 Difference]: Start difference. First operand 907 states and 1202 transitions. Second operand has 13 states, 13 states have (on average 9.384615384615385) internal successors, (122), 13 states have internal predecessors, (122), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 07:26:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:21,361 INFO L93 Difference]: Finished difference Result 3264 states and 4332 transitions. [2022-12-14 07:26:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 07:26:21,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.384615384615385) internal successors, (122), 13 states have internal predecessors, (122), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 99 [2022-12-14 07:26:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:21,371 INFO L225 Difference]: With dead ends: 3264 [2022-12-14 07:26:21,371 INFO L226 Difference]: Without dead ends: 2364 [2022-12-14 07:26:21,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 266 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=904, Invalid=6236, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 07:26:21,373 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 959 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:21,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 542 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:26:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-12-14 07:26:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1940. [2022-12-14 07:26:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1439 states have (on average 1.2870048644892287) internal successors, (1852), 1450 states have internal predecessors, (1852), 307 states have call successors, (307), 194 states have call predecessors, (307), 193 states have return successors, (305), 296 states have call predecessors, (305), 305 states have call successors, (305) [2022-12-14 07:26:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 2464 transitions. [2022-12-14 07:26:21,528 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 2464 transitions. Word has length 99 [2022-12-14 07:26:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:21,528 INFO L495 AbstractCegarLoop]: Abstraction has 1940 states and 2464 transitions. [2022-12-14 07:26:21,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.384615384615385) internal successors, (122), 13 states have internal predecessors, (122), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 07:26:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 2464 transitions. [2022-12-14 07:26:21,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 07:26:21,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:21,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1] [2022-12-14 07:26:21,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:26:21,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 07:26:21,732 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:21,732 INFO L85 PathProgramCache]: Analyzing trace with hash -237685219, now seen corresponding path program 1 times [2022-12-14 07:26:21,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:21,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907713585] [2022-12-14 07:26:21,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:21,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 07:26:21,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907713585] [2022-12-14 07:26:21,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907713585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:21,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850614394] [2022-12-14 07:26:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:21,769 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:21,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:26:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:21,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:26:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:26:21,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:21,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850614394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:21,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:21,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 07:26:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709678046] [2022-12-14 07:26:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:21,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:21,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:26:21,891 INFO L87 Difference]: Start difference. First operand 1940 states and 2464 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:22,089 INFO L93 Difference]: Finished difference Result 3261 states and 4243 transitions. [2022-12-14 07:26:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:22,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (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 103 [2022-12-14 07:26:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:22,096 INFO L225 Difference]: With dead ends: 3261 [2022-12-14 07:26:22,097 INFO L226 Difference]: Without dead ends: 1953 [2022-12-14 07:26:22,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:26:22,101 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 79 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:22,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 230 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-12-14 07:26:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1926. [2022-12-14 07:26:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1425 states have (on average 1.2505263157894737) internal successors, (1782), 1436 states have internal predecessors, (1782), 307 states have call successors, (307), 194 states have call predecessors, (307), 193 states have return successors, (305), 296 states have call predecessors, (305), 305 states have call successors, (305) [2022-12-14 07:26:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2394 transitions. [2022-12-14 07:26:22,341 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2394 transitions. Word has length 103 [2022-12-14 07:26:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:22,341 INFO L495 AbstractCegarLoop]: Abstraction has 1926 states and 2394 transitions. [2022-12-14 07:26:22,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2394 transitions. [2022-12-14 07:26:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 07:26:22,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:22,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:22,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:26:22,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:22,545 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1634252769, now seen corresponding path program 1 times [2022-12-14 07:26:22,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:22,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179520208] [2022-12-14 07:26:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:22,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 07:26:22,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:22,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179520208] [2022-12-14 07:26:22,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179520208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:22,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:26:22,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:26:22,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682962040] [2022-12-14 07:26:22,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:22,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:26:22,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:22,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:26:22,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:26:22,619 INFO L87 Difference]: Start difference. First operand 1926 states and 2394 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:26:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:22,918 INFO L93 Difference]: Finished difference Result 3336 states and 4229 transitions. [2022-12-14 07:26:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:26:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-12-14 07:26:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:22,926 INFO L225 Difference]: With dead ends: 3336 [2022-12-14 07:26:22,926 INFO L226 Difference]: Without dead ends: 2049 [2022-12-14 07:26:22,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:26:22,930 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 114 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:22,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 181 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:26:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-12-14 07:26:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2049. [2022-12-14 07:26:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1529 states have (on average 1.2315238718116417) internal successors, (1883), 1540 states have internal predecessors, (1883), 312 states have call successors, (312), 208 states have call predecessors, (312), 207 states have return successors, (310), 301 states have call predecessors, (310), 310 states have call successors, (310) [2022-12-14 07:26:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 2505 transitions. [2022-12-14 07:26:23,105 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 2505 transitions. Word has length 103 [2022-12-14 07:26:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:23,105 INFO L495 AbstractCegarLoop]: Abstraction has 2049 states and 2505 transitions. [2022-12-14 07:26:23,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:26:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 2505 transitions. [2022-12-14 07:26:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 07:26:23,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:23,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:23,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:26:23,108 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash -290207190, now seen corresponding path program 1 times [2022-12-14 07:26:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669454078] [2022-12-14 07:26:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 07:26:23,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:23,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669454078] [2022-12-14 07:26:23,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669454078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416459696] [2022-12-14 07:26:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:23,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:23,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:23,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:26:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:26:23,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 07:26:23,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:23,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416459696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:23,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:23,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-12-14 07:26:23,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345870032] [2022-12-14 07:26:23,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:23,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:26:23,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:23,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:26:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:26:23,297 INFO L87 Difference]: Start difference. First operand 2049 states and 2505 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:26:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:23,531 INFO L93 Difference]: Finished difference Result 3044 states and 3731 transitions. [2022-12-14 07:26:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:26:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2022-12-14 07:26:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:23,536 INFO L225 Difference]: With dead ends: 3044 [2022-12-14 07:26:23,536 INFO L226 Difference]: Without dead ends: 2118 [2022-12-14 07:26:23,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:23,538 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 93 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:23,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 401 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:26:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2022-12-14 07:26:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1958. [2022-12-14 07:26:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1449 states have (on average 1.2298136645962734) internal successors, (1782), 1457 states have internal predecessors, (1782), 308 states have call successors, (308), 201 states have call predecessors, (308), 200 states have return successors, (306), 300 states have call predecessors, (306), 306 states have call successors, (306) [2022-12-14 07:26:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2396 transitions. [2022-12-14 07:26:23,705 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2396 transitions. Word has length 104 [2022-12-14 07:26:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:23,705 INFO L495 AbstractCegarLoop]: Abstraction has 1958 states and 2396 transitions. [2022-12-14 07:26:23,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 07:26:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2396 transitions. [2022-12-14 07:26:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 07:26:23,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:23,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:23,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:26:23,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:23,910 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2064866445, now seen corresponding path program 1 times [2022-12-14 07:26:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:23,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224322719] [2022-12-14 07:26:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:23,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 07:26:24,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:24,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224322719] [2022-12-14 07:26:24,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224322719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:24,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410371569] [2022-12-14 07:26:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:24,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:24,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:24,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:24,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:26:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:26:24,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:26:24,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:24,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410371569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:24,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:24,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 07:26:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378653957] [2022-12-14 07:26:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:24,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:24,144 INFO L87 Difference]: Start difference. First operand 1958 states and 2396 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:26:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:24,405 INFO L93 Difference]: Finished difference Result 3709 states and 4587 transitions. [2022-12-14 07:26:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 105 [2022-12-14 07:26:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:24,411 INFO L225 Difference]: With dead ends: 3709 [2022-12-14 07:26:24,411 INFO L226 Difference]: Without dead ends: 2377 [2022-12-14 07:26:24,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:24,413 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:24,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-12-14 07:26:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2329. [2022-12-14 07:26:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1786 states have (on average 1.202127659574468) internal successors, (2147), 1794 states have internal predecessors, (2147), 311 states have call successors, (311), 232 states have call predecessors, (311), 231 states have return successors, (336), 303 states have call predecessors, (336), 309 states have call successors, (336) [2022-12-14 07:26:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2794 transitions. [2022-12-14 07:26:24,603 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2794 transitions. Word has length 105 [2022-12-14 07:26:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:24,603 INFO L495 AbstractCegarLoop]: Abstraction has 2329 states and 2794 transitions. [2022-12-14 07:26:24,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:26:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2794 transitions. [2022-12-14 07:26:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 07:26:24,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:24,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:24,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:26:24,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:24,808 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2081748861, now seen corresponding path program 1 times [2022-12-14 07:26:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:24,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426727770] [2022-12-14 07:26:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:24,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:26:24,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426727770] [2022-12-14 07:26:24,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426727770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907559603] [2022-12-14 07:26:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:24,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:24,881 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:24,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:26:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:26:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:26:24,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:24,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907559603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:24,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:24,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 07:26:24,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29924151] [2022-12-14 07:26:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:24,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:24,991 INFO L87 Difference]: Start difference. First operand 2329 states and 2794 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:25,296 INFO L93 Difference]: Finished difference Result 4190 states and 5054 transitions. [2022-12-14 07:26:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 102 [2022-12-14 07:26:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:25,308 INFO L225 Difference]: With dead ends: 4190 [2022-12-14 07:26:25,308 INFO L226 Difference]: Without dead ends: 2745 [2022-12-14 07:26:25,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:25,310 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 50 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:25,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 239 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-12-14 07:26:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2466. [2022-12-14 07:26:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1899 states have (on average 1.2101105845181674) internal successors, (2298), 1907 states have internal predecessors, (2298), 323 states have call successors, (323), 244 states have call predecessors, (323), 243 states have return successors, (348), 315 states have call predecessors, (348), 321 states have call successors, (348) [2022-12-14 07:26:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 2969 transitions. [2022-12-14 07:26:25,523 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 2969 transitions. Word has length 102 [2022-12-14 07:26:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:25,523 INFO L495 AbstractCegarLoop]: Abstraction has 2466 states and 2969 transitions. [2022-12-14 07:26:25,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 2969 transitions. [2022-12-14 07:26:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 07:26:25,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:25,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:25,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 07:26:25,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 07:26:25,728 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1427695449, now seen corresponding path program 1 times [2022-12-14 07:26:25,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:25,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600841790] [2022-12-14 07:26:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:25,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 07:26:25,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600841790] [2022-12-14 07:26:25,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600841790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467840079] [2022-12-14 07:26:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:25,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:25,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:26:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:26:25,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:26:25,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:25,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467840079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:25,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:25,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 07:26:25,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581394898] [2022-12-14 07:26:25,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:25,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:26:25,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:26:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:26:25,926 INFO L87 Difference]: Start difference. First operand 2466 states and 2969 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:26,193 INFO L93 Difference]: Finished difference Result 4141 states and 5100 transitions. [2022-12-14 07:26:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:26:26,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 102 [2022-12-14 07:26:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:26,198 INFO L225 Difference]: With dead ends: 4141 [2022-12-14 07:26:26,198 INFO L226 Difference]: Without dead ends: 2461 [2022-12-14 07:26:26,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:26:26,200 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 79 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:26,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 243 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:26:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-12-14 07:26:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2436. [2022-12-14 07:26:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 1869 states have (on average 1.1738897806313537) internal successors, (2194), 1877 states have internal predecessors, (2194), 323 states have call successors, (323), 244 states have call predecessors, (323), 243 states have return successors, (348), 315 states have call predecessors, (348), 321 states have call successors, (348) [2022-12-14 07:26:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 2865 transitions. [2022-12-14 07:26:26,411 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 2865 transitions. Word has length 102 [2022-12-14 07:26:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:26,412 INFO L495 AbstractCegarLoop]: Abstraction has 2436 states and 2865 transitions. [2022-12-14 07:26:26,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:26:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 2865 transitions. [2022-12-14 07:26:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 07:26:26,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:26,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:26,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 07:26:26,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 07:26:26,615 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:26,616 INFO L85 PathProgramCache]: Analyzing trace with hash -266230518, now seen corresponding path program 1 times [2022-12-14 07:26:26,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:26,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092458048] [2022-12-14 07:26:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:26,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 07:26:26,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092458048] [2022-12-14 07:26:26,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092458048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403790212] [2022-12-14 07:26:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:26,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:26,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:26,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:26:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:26:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:26:26,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:26,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403790212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:26,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:26,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-12-14 07:26:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645962450] [2022-12-14 07:26:26,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:26,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:26:26,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:26:26,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:26:26,869 INFO L87 Difference]: Start difference. First operand 2436 states and 2865 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 07:26:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:27,250 INFO L93 Difference]: Finished difference Result 4741 states and 5631 transitions. [2022-12-14 07:26:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:26:27,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 103 [2022-12-14 07:26:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:27,257 INFO L225 Difference]: With dead ends: 4741 [2022-12-14 07:26:27,257 INFO L226 Difference]: Without dead ends: 3120 [2022-12-14 07:26:27,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:26:27,259 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 123 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:27,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 251 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:26:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-12-14 07:26:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2784. [2022-12-14 07:26:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2184 states have (on average 1.1478937728937728) internal successors, (2507), 2195 states have internal predecessors, (2507), 329 states have call successors, (329), 269 states have call predecessors, (329), 270 states have return successors, (370), 320 states have call predecessors, (370), 327 states have call successors, (370) [2022-12-14 07:26:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3206 transitions. [2022-12-14 07:26:27,564 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3206 transitions. Word has length 103 [2022-12-14 07:26:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:27,565 INFO L495 AbstractCegarLoop]: Abstraction has 2784 states and 3206 transitions. [2022-12-14 07:26:27,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 07:26:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3206 transitions. [2022-12-14 07:26:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 07:26:27,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:27,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:27,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 07:26:27,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 07:26:27,769 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:27,770 INFO L85 PathProgramCache]: Analyzing trace with hash -354370944, now seen corresponding path program 1 times [2022-12-14 07:26:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893656012] [2022-12-14 07:26:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:26:27,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:27,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893656012] [2022-12-14 07:26:27,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893656012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:27,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:26:27,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:26:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304664532] [2022-12-14 07:26:27,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:26:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:26:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:26:27,888 INFO L87 Difference]: Start difference. First operand 2784 states and 3206 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:26:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:28,372 INFO L93 Difference]: Finished difference Result 5416 states and 6291 transitions. [2022-12-14 07:26:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:26:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 104 [2022-12-14 07:26:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:28,380 INFO L225 Difference]: With dead ends: 5416 [2022-12-14 07:26:28,380 INFO L226 Difference]: Without dead ends: 3526 [2022-12-14 07:26:28,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:26:28,383 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 79 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:28,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 289 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:26:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3526 states. [2022-12-14 07:26:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3526 to 3423. [2022-12-14 07:26:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 2667 states have (on average 1.1436070491188601) internal successors, (3050), 2678 states have internal predecessors, (3050), 415 states have call successors, (415), 337 states have call predecessors, (415), 340 states have return successors, (491), 408 states have call predecessors, (491), 413 states have call successors, (491) [2022-12-14 07:26:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 3956 transitions. [2022-12-14 07:26:28,688 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 3956 transitions. Word has length 104 [2022-12-14 07:26:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:28,689 INFO L495 AbstractCegarLoop]: Abstraction has 3423 states and 3956 transitions. [2022-12-14 07:26:28,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:26:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 3956 transitions. [2022-12-14 07:26:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 07:26:28,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:28,691 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 07:26:28,691 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1388290631, now seen corresponding path program 1 times [2022-12-14 07:26:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:28,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24038121] [2022-12-14 07:26:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:28,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:26:28,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:28,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24038121] [2022-12-14 07:26:28,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24038121] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:28,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192732059] [2022-12-14 07:26:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:28,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:28,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:28,781 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:28,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:26:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:26:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:26:28,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:26:28,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192732059] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:28,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:26:28,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 07:26:28,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936211254] [2022-12-14 07:26:28,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:28,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:26:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:26:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:26:28,895 INFO L87 Difference]: Start difference. First operand 3423 states and 3956 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 07:26:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:29,542 INFO L93 Difference]: Finished difference Result 6801 states and 7902 transitions. [2022-12-14 07:26:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:26:29,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 104 [2022-12-14 07:26:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:29,551 INFO L225 Difference]: With dead ends: 6801 [2022-12-14 07:26:29,551 INFO L226 Difference]: Without dead ends: 4441 [2022-12-14 07:26:29,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:26:29,555 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 184 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:29,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 362 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:26:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2022-12-14 07:26:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 4323. [2022-12-14 07:26:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 3367 states have (on average 1.1381051381051381) internal successors, (3832), 3375 states have internal predecessors, (3832), 529 states have call successors, (529), 427 states have call predecessors, (529), 426 states have return successors, (646), 521 states have call predecessors, (646), 527 states have call successors, (646) [2022-12-14 07:26:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 5007 transitions. [2022-12-14 07:26:29,945 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 5007 transitions. Word has length 104 [2022-12-14 07:26:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:29,945 INFO L495 AbstractCegarLoop]: Abstraction has 4323 states and 5007 transitions. [2022-12-14 07:26:29,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 07:26:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 5007 transitions. [2022-12-14 07:26:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 07:26:29,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:29,947 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-12-14 07:26:29,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 07:26:30,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 07:26:30,149 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:26:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash 704986735, now seen corresponding path program 1 times [2022-12-14 07:26:30,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:26:30,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389148110] [2022-12-14 07:26:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:30,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:26:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:26:30,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:26:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389148110] [2022-12-14 07:26:30,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389148110] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:26:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696442442] [2022-12-14 07:26:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:30,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:26:30,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:26:30,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:26:30,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:26:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:26:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:26:30,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:26:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 07:26:30,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696442442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:26:30,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590515841] [2022-12-14 07:26:30,604 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-12-14 07:26:30,604 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:26:30,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:26:30,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:26:30,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:26:36,109 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 178 for LOIs [2022-12-14 07:26:36,513 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2022-12-14 07:26:36,547 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 184 for LOIs [2022-12-14 07:26:36,591 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 71 for LOIs [2022-12-14 07:26:36,691 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 62 for LOIs [2022-12-14 07:26:37,105 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 208 for LOIs [2022-12-14 07:26:38,011 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:26:54,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [590515841] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:26:54,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:26:54,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 8, 6] total 59 [2022-12-14 07:26:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084898016] [2022-12-14 07:26:54,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:26:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 07:26:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 07:26:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 07:26:54,425 INFO L87 Difference]: Start difference. First operand 4323 states and 5007 transitions. Second operand has 45 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 07:27:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:27:18,943 INFO L93 Difference]: Finished difference Result 8218 states and 9525 transitions. [2022-12-14 07:27:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-14 07:27:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 110 [2022-12-14 07:27:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:27:18,951 INFO L225 Difference]: With dead ends: 8218 [2022-12-14 07:27:18,951 INFO L226 Difference]: Without dead ends: 4158 [2022-12-14 07:27:18,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 268 SyntacticMatches, 13 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=1497, Invalid=15015, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 07:27:18,959 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 300 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:27:18,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 824 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 07:27:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2022-12-14 07:27:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 4133. [2022-12-14 07:27:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 3218 states have (on average 1.1364201367308888) internal successors, (3657), 3226 states have internal predecessors, (3657), 505 states have call successors, (505), 411 states have call predecessors, (505), 409 states have return successors, (620), 496 states have call predecessors, (620), 503 states have call successors, (620) [2022-12-14 07:27:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 4782 transitions. [2022-12-14 07:27:19,345 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 4782 transitions. Word has length 110 [2022-12-14 07:27:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:27:19,345 INFO L495 AbstractCegarLoop]: Abstraction has 4133 states and 4782 transitions. [2022-12-14 07:27:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 07:27:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 4782 transitions. [2022-12-14 07:27:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 07:27:19,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:27:19,348 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:27:19,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 07:27:19,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:27:19,549 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:27:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:27:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash -481106244, now seen corresponding path program 1 times [2022-12-14 07:27:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:27:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741852874] [2022-12-14 07:27:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:19,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:27:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:27:19,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:27:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741852874] [2022-12-14 07:27:19,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741852874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:27:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226320735] [2022-12-14 07:27:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:27:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:27:19,647 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:27:19,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 07:27:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:19,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:27:19,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:27:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:27:19,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 07:27:19,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226320735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:19,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717112454] [2022-12-14 07:27:19,964 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-12-14 07:27:19,965 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:27:19,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:27:19,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:27:19,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:27:24,934 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 179 for LOIs [2022-12-14 07:27:25,372 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 121 for LOIs [2022-12-14 07:27:25,405 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 185 for LOIs [2022-12-14 07:27:25,449 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 71 for LOIs [2022-12-14 07:27:25,516 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 110 for LOIs [2022-12-14 07:27:25,810 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 209 for LOIs [2022-12-14 07:27:26,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:27:41,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [717112454] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:27:41,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:27:41,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 8, 6] total 62 [2022-12-14 07:27:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594378088] [2022-12-14 07:27:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:27:41,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 07:27:41,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:27:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 07:27:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=3379, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 07:27:41,096 INFO L87 Difference]: Start difference. First operand 4133 states and 4782 transitions. Second operand has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 07:28:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:28:11,939 INFO L93 Difference]: Finished difference Result 6748 states and 7819 transitions. [2022-12-14 07:28:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 07:28:11,939 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 112 [2022-12-14 07:28:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:28:11,946 INFO L225 Difference]: With dead ends: 6748 [2022-12-14 07:28:11,946 INFO L226 Difference]: Without dead ends: 3382 [2022-12-14 07:28:11,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 270 SyntacticMatches, 14 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7738 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=1824, Invalid=18768, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 07:28:11,953 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 313 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 2767 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:28:11,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 978 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2767 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 07:28:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2022-12-14 07:28:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 3334. [2022-12-14 07:28:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 2587 states have (on average 1.1325860069578662) internal successors, (2930), 2596 states have internal predecessors, (2930), 412 states have call successors, (412), 336 states have call predecessors, (412), 334 states have return successors, (501), 402 states have call predecessors, (501), 410 states have call successors, (501) [2022-12-14 07:28:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 3843 transitions. [2022-12-14 07:28:12,308 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 3843 transitions. Word has length 112 [2022-12-14 07:28:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:28:12,308 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 3843 transitions. [2022-12-14 07:28:12,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 07:28:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 3843 transitions. [2022-12-14 07:28:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 07:28:12,310 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:28:12,310 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:28:12,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 07:28:12,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 07:28:12,511 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:28:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:28:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash -13756237, now seen corresponding path program 1 times [2022-12-14 07:28:12,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:28:12,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162962430] [2022-12-14 07:28:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:28:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:28:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:28:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:28:12,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:28:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162962430] [2022-12-14 07:28:12,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162962430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:28:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543239306] [2022-12-14 07:28:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:28:12,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:28:12,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:28:12,769 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:28:12,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 07:28:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:28:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:28:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:28:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:28:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:28:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 07:28:13,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543239306] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:28:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711823196] [2022-12-14 07:28:13,071 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-12-14 07:28:13,071 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:28:13,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:28:13,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:28:13,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:28:17,813 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 179 for LOIs [2022-12-14 07:28:24,494 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 121 for LOIs [2022-12-14 07:28:24,528 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 185 for LOIs [2022-12-14 07:28:24,572 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 71 for LOIs [2022-12-14 07:28:24,629 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 63 for LOIs [2022-12-14 07:28:24,936 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 209 for LOIs [2022-12-14 07:28:28,880 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:28:35,503 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 357 DAG size of output: 230 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:51,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [711823196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:28:51,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:28:51,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [13, 9, 6] total 68 [2022-12-14 07:28:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096445810] [2022-12-14 07:28:51,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:28:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 07:28:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:28:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 07:28:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4167, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 07:28:51,984 INFO L87 Difference]: Start difference. First operand 3334 states and 3843 transitions. Second operand has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 07:29:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:33,185 INFO L93 Difference]: Finished difference Result 5846 states and 6769 transitions. [2022-12-14 07:29:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 07:29:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 113 [2022-12-14 07:29:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:33,192 INFO L225 Difference]: With dead ends: 5846 [2022-12-14 07:29:33,192 INFO L226 Difference]: Without dead ends: 2842 [2022-12-14 07:29:33,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 277 SyntacticMatches, 14 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8790 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=1818, Invalid=20832, Unknown=0, NotChecked=0, Total=22650 [2022-12-14 07:29:33,197 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 330 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 3359 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 3359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:33,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1175 Invalid, 3465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 3359 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 07:29:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2022-12-14 07:29:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2793. [2022-12-14 07:29:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2160 states have (on average 1.1287037037037038) internal successors, (2438), 2169 states have internal predecessors, (2438), 349 states have call successors, (349), 285 states have call predecessors, (349), 283 states have return successors, (433), 339 states have call predecessors, (433), 347 states have call successors, (433) [2022-12-14 07:29:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3220 transitions. [2022-12-14 07:29:33,522 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3220 transitions. Word has length 113 [2022-12-14 07:29:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:33,523 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 3220 transitions. [2022-12-14 07:29:33,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 07:29:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3220 transitions. [2022-12-14 07:29:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 07:29:33,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:33,525 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:33,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 07:29:33,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 07:29:33,725 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:29:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:33,726 INFO L85 PathProgramCache]: Analyzing trace with hash -944868056, now seen corresponding path program 1 times [2022-12-14 07:29:33,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:29:33,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965634652] [2022-12-14 07:29:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:29:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 07:29:34,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965634652] [2022-12-14 07:29:34,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965634652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:29:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246805307] [2022-12-14 07:29:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:34,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:34,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:34,069 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:29:34,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 07:29:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 07:29:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:29:34,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:29:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 07:29:35,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246805307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:29:35,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192565109] [2022-12-14 07:29:35,050 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 07:29:35,050 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:29:35,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:29:35,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:29:35,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:29:47,953 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 59 for LOIs [2022-12-14 07:29:47,956 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 180 for LOIs [2022-12-14 07:29:56,378 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 64 for LOIs [2022-12-14 07:29:56,385 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 186 for LOIs [2022-12-14 07:29:56,430 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 116 for LOIs [2022-12-14 07:29:56,630 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 62 for LOIs [2022-12-14 07:29:56,920 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 210 for LOIs [2022-12-14 07:30:00,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:30:18,669 WARN L233 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 442 DAG size of output: 279 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:30:31,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177832#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~p_last_write~0 0) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 07:30:31,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:30:31,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:30:31,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 39 [2022-12-14 07:30:31,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288276523] [2022-12-14 07:30:31,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:30:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 07:30:31,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 07:30:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=8508, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 07:30:31,101 INFO L87 Difference]: Start difference. First operand 2793 states and 3220 transitions. Second operand has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (45), 12 states have call predecessors, (45), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-12-14 07:30:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:41,290 INFO L93 Difference]: Finished difference Result 8013 states and 9337 transitions. [2022-12-14 07:30:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-12-14 07:30:41,290 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (45), 12 states have call predecessors, (45), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) Word has length 115 [2022-12-14 07:30:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:41,299 INFO L225 Difference]: With dead ends: 8013 [2022-12-14 07:30:41,299 INFO L226 Difference]: Without dead ends: 5628 [2022-12-14 07:30:41,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24542 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=6686, Invalid=55066, Unknown=0, NotChecked=0, Total=61752 [2022-12-14 07:30:41,307 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 2569 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 6139 mSolverCounterSat, 2104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 8243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2104 IncrementalHoareTripleChecker+Valid, 6139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:41,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2569 Valid, 2103 Invalid, 8243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2104 Valid, 6139 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 07:30:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2022-12-14 07:30:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 3177. [2022-12-14 07:30:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 2385 states have (on average 1.1064989517819706) internal successors, (2639), 2421 states have internal predecessors, (2639), 439 states have call successors, (439), 341 states have call predecessors, (439), 352 states have return successors, (459), 415 states have call predecessors, (459), 437 states have call successors, (459) [2022-12-14 07:30:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 3537 transitions. [2022-12-14 07:30:41,779 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 3537 transitions. Word has length 115 [2022-12-14 07:30:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:41,779 INFO L495 AbstractCegarLoop]: Abstraction has 3177 states and 3537 transitions. [2022-12-14 07:30:41,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (45), 12 states have call predecessors, (45), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-12-14 07:30:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 3537 transitions. [2022-12-14 07:30:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 07:30:41,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:41,781 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:41,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 07:30:41,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:41,982 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1910828203, now seen corresponding path program 1 times [2022-12-14 07:30:41,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:41,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776743239] [2022-12-14 07:30:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:41,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 07:30:42,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:30:42,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776743239] [2022-12-14 07:30:42,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776743239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:30:42,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:30:42,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:30:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901854946] [2022-12-14 07:30:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:42,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:30:42,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:30:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:30:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:30:42,092 INFO L87 Difference]: Start difference. First operand 3177 states and 3537 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 07:30:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:43,278 INFO L93 Difference]: Finished difference Result 7874 states and 8811 transitions. [2022-12-14 07:30:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:30:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 128 [2022-12-14 07:30:43,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:43,290 INFO L225 Difference]: With dead ends: 7874 [2022-12-14 07:30:43,290 INFO L226 Difference]: Without dead ends: 6042 [2022-12-14 07:30:43,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:30:43,294 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 232 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:43,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 556 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:30:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2022-12-14 07:30:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4432. [2022-12-14 07:30:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3308 states have (on average 1.1112454655380894) internal successors, (3676), 3351 states have internal predecessors, (3676), 630 states have call successors, (630), 478 states have call predecessors, (630), 493 states have return successors, (654), 603 states have call predecessors, (654), 628 states have call successors, (654) [2022-12-14 07:30:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 4960 transitions. [2022-12-14 07:30:43,986 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 4960 transitions. Word has length 128 [2022-12-14 07:30:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:43,986 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 4960 transitions. [2022-12-14 07:30:43,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 07:30:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 4960 transitions. [2022-12-14 07:30:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 07:30:43,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:43,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:43,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 07:30:43,988 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:30:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash 71321074, now seen corresponding path program 1 times [2022-12-14 07:30:43,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:30:43,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713330644] [2022-12-14 07:30:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:30:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:30:44,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:30:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:30:44,050 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:30:44,050 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:30:44,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-12-14 07:30:44,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 07:30:44,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 07:30:44,055 INFO L445 BasicCegarLoop]: Path program histogram: [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] [2022-12-14 07:30:44,057 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 07:30:44,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:30:44 BoogieIcfgContainer [2022-12-14 07:30:44,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 07:30:44,135 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 07:30:44,135 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 07:30:44,135 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 07:30:44,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:25:46" (3/4) ... [2022-12-14 07:30:44,137 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 07:30:44,204 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 07:30:44,205 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 07:30:44,205 INFO L158 Benchmark]: Toolchain (without parser) took 298726.13ms. Allocated memory was 130.0MB in the beginning and 1.1GB in the end (delta: 956.3MB). Free memory was 95.4MB in the beginning and 794.3MB in the end (delta: -698.9MB). Peak memory consumption was 259.5MB. Max. memory is 16.1GB. [2022-12-14 07:30:44,205 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 130.0MB. Free memory is still 96.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:30:44,205 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.55ms. Allocated memory is still 130.0MB. Free memory was 95.1MB in the beginning and 78.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 07:30:44,205 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.30ms. Allocated memory is still 130.0MB. Free memory was 78.3MB in the beginning and 75.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 07:30:44,205 INFO L158 Benchmark]: Boogie Preprocessor took 24.50ms. Allocated memory is still 130.0MB. Free memory was 75.4MB in the beginning and 73.0MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 07:30:44,206 INFO L158 Benchmark]: RCFGBuilder took 607.91ms. Allocated memory was 130.0MB in the beginning and 172.0MB in the end (delta: 41.9MB). Free memory was 72.7MB in the beginning and 102.5MB in the end (delta: -29.8MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2022-12-14 07:30:44,206 INFO L158 Benchmark]: TraceAbstraction took 297726.23ms. Allocated memory was 172.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 102.5MB in the beginning and 811.0MB in the end (delta: -708.5MB). Peak memory consumption was 206.4MB. Max. memory is 16.1GB. [2022-12-14 07:30:44,206 INFO L158 Benchmark]: Witness Printer took 69.95ms. Allocated memory is still 1.1GB. Free memory was 811.0MB in the beginning and 794.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 07:30:44,207 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 130.0MB. Free memory is still 96.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.55ms. Allocated memory is still 130.0MB. Free memory was 95.1MB in the beginning and 78.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.30ms. Allocated memory is still 130.0MB. Free memory was 78.3MB in the beginning and 75.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.50ms. Allocated memory is still 130.0MB. Free memory was 75.4MB in the beginning and 73.0MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 607.91ms. Allocated memory was 130.0MB in the beginning and 172.0MB in the end (delta: 41.9MB). Free memory was 72.7MB in the beginning and 102.5MB in the end (delta: -29.8MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * TraceAbstraction took 297726.23ms. Allocated memory was 172.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 102.5MB in the beginning and 811.0MB in the end (delta: -708.5MB). Peak memory consumption was 206.4MB. Max. memory is 16.1GB. * Witness Printer took 69.95ms. Allocated memory is still 1.1GB. Free memory was 811.0MB in the beginning and 794.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. 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: 390]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int q_buf_0 ; [L33] int q_free ; [L34] int q_read_ev ; [L35] int q_write_ev ; [L36] int p_num_write ; [L37] int p_last_write ; [L38] int p_dw_st ; [L39] int p_dw_pc ; [L40] int p_dw_i ; [L41] int c_num_read ; [L42] int c_last_read ; [L43] int c_dr_st ; [L44] int c_dr_pc ; [L45] int c_dr_i ; [L152] static int a_t ; [L394] int m_pc = 0; [L395] int t1_pc = 0; [L396] int t2_pc = 0; [L397] int m_st ; [L398] int t1_st ; [L399] int t2_st ; [L400] int m_i ; [L401] int t1_i ; [L402] int t2_i ; [L403] int M_E = 2; [L404] int T1_E = 2; [L405] int T2_E = 2; [L406] int E_M = 2; [L407] int E_1 = 2; [L408] int E_2 = 2; [L413] int token ; [L415] int local ; [L993] COND FALSE !(__VERIFIER_nondet_int()) [L996] CALL main2() [L980] int __retres1 ; [L984] CALL init_model2() [L894] m_i = 1 [L895] t1_i = 1 [L896] t2_i = 1 [L984] RET init_model2() [L985] CALL start_simulation2() [L921] int kernel_st ; [L922] int tmp ; [L923] int tmp___0 ; [L927] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L928] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L929] CALL init_threads2() [L613] COND TRUE m_i == 1 [L614] m_st = 0 [L618] COND TRUE t1_i == 1 [L619] t1_st = 0 [L623] COND TRUE t2_i == 1 [L624] t2_st = 0 [L929] RET init_threads2() [L930] CALL fire_delta_events2() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L726] COND FALSE !(M_E == 0) [L731] COND FALSE !(T1_E == 0) [L736] COND FALSE !(T2_E == 0) [L741] COND FALSE !(E_M == 0) [L746] COND FALSE !(E_1 == 0) [L751] COND FALSE !(E_2 == 0) [L930] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L931] CALL activate_threads2() VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L548] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L558] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L560] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L564] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L567] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L577] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L821] CALL, EXPR is_transmit2_triggered() [L583] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L586] COND FALSE !(t2_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L596] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND FALSE !(\read(tmp___1)) [L931] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L932] CALL reset_delta_events2() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L764] COND FALSE !(M_E == 1) [L769] COND FALSE !(T1_E == 1) [L774] COND FALSE !(T2_E == 1) [L779] COND FALSE !(E_M == 1) [L784] COND FALSE !(E_1 == 1) [L789] COND FALSE !(E_2 == 1) [L932] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L935] COND TRUE 1 [L938] kernel_st = 1 [L939] CALL eval2() [L659] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L663] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L666] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L633] int __retres1 ; [L636] COND TRUE m_st == 0 [L637] __retres1 = 1 [L654] return (__retres1); [L666] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L666] tmp = exists_runnable_thread2() [L668] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, tmp=1, token=0] [L673] COND TRUE m_st == 0 [L674] int tmp_ndt_1; [L675] tmp_ndt_1 = __VERIFIER_nondet_int() [L676] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, tmp=1, tmp_ndt_1=0, token=0] [L687] COND TRUE t1_st == 0 [L688] int tmp_ndt_2; [L689] tmp_ndt_2 = __VERIFIER_nondet_int() [L690] COND TRUE \read(tmp_ndt_2) [L692] t1_st = 1 [L693] CALL transmit1() [L476] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L487] COND TRUE 1 [L489] t1_pc = 1 [L490] t1_st = 2 [L693] RET transmit1() [L701] COND TRUE t2_st == 0 [L702] int tmp_ndt_3; [L703] tmp_ndt_3 = __VERIFIER_nondet_int() [L704] COND TRUE \read(tmp_ndt_3) [L706] t2_st = 1 [L707] CALL transmit2() [L512] COND TRUE t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, token=0] [L523] COND TRUE 1 [L525] t2_pc = 1 [L526] t2_st = 2 [L707] RET transmit2() [L663] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, token=0] [L666] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L633] int __retres1 ; [L636] COND TRUE m_st == 0 [L637] __retres1 = 1 [L654] return (__retres1); [L666] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, token=0] [L666] tmp = exists_runnable_thread2() [L668] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, token=0] [L673] COND TRUE m_st == 0 [L674] int tmp_ndt_1; [L675] tmp_ndt_1 = __VERIFIER_nondet_int() [L676] COND TRUE \read(tmp_ndt_1) [L678] m_st = 1 [L679] CALL master() [L418] int tmp_var = __VERIFIER_nondet_int(); [L420] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L431] COND TRUE 1 [L434] token = __VERIFIER_nondet_int() [L435] local = token [L436] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L437] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L837] CALL activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L548] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L558] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L560] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L564] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L567] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L568] COND TRUE E_1 == 1 [L569] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND TRUE \read(tmp___0) [L816] t1_st = 0 [L821] CALL, EXPR is_transmit2_triggered() [L583] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L586] COND TRUE t2_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L587] COND FALSE !(E_2 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L596] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND FALSE !(\read(tmp___1)) [L837] RET activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L437] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L438] E_1 = 2 [L439] m_pc = 1 [L440] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L679] RET master() [L687] COND TRUE t1_st == 0 [L688] int tmp_ndt_2; [L689] tmp_ndt_2 = __VERIFIER_nondet_int() [L690] COND TRUE \read(tmp_ndt_2) [L692] t1_st = 1 [L693] CALL transmit1() [L476] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L479] COND TRUE t1_pc == 1 [L495] token += 1 [L496] E_2 = 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_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L497] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L837] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L548] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L549] COND FALSE !(E_M == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L558] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L560] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L564] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L567] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L568] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L577] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L821] CALL, EXPR is_transmit2_triggered() [L583] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L586] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L587] COND TRUE E_2 == 1 [L588] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND TRUE \read(tmp___1) [L824] t2_st = 0 [L837] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_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=2, E_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L497] 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_2=1, 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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L498] E_2 = 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L487] COND TRUE 1 [L489] t1_pc = 1 [L490] t1_st = 2 [L693] RET transmit1() [L701] COND TRUE t2_st == 0 [L702] int tmp_ndt_3; [L703] tmp_ndt_3 = __VERIFIER_nondet_int() [L704] COND TRUE \read(tmp_ndt_3) [L706] t2_st = 1 [L707] CALL transmit2() [L512] COND FALSE !(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=1] [L515] COND TRUE t2_pc == 1 [L531] token += 1 [L532] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L533] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L837] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L548] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L549] COND TRUE E_M == 1 [L550] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L560] 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() [L564] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L567] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L568] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L577] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L821] CALL, EXPR is_transmit2_triggered() [L583] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L586] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L587] COND FALSE !(E_2 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L596] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND FALSE !(\read(tmp___1)) [L837] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L533] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L534] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L523] COND TRUE 1 [L525] t2_pc = 1 [L526] t2_st = 2 [L707] RET transmit2() [L663] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=-1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L666] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L633] int __retres1 ; [L636] COND TRUE m_st == 0 [L637] __retres1 = 1 [L654] return (__retres1); [L666] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=-1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L666] tmp = exists_runnable_thread2() [L668] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=-1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L673] COND TRUE m_st == 0 [L674] int tmp_ndt_1; [L675] tmp_ndt_1 = __VERIFIER_nondet_int() [L676] COND TRUE \read(tmp_ndt_1) [L678] m_st = 1 [L679] CALL master() [L418] int tmp_var = __VERIFIER_nondet_int(); [L420] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L423] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L445] COND FALSE !(token != local + 2) [L450] COND TRUE tmp_var <= 5 [L451] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L456] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L457] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L458] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L459] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L390] 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_2=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_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] - UnprovableResult [Line: 27]: 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 11 procedures, 135 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 297.6s, OverallIterations: 32, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 114.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8038 SdHoareTripleChecker+Valid, 14.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7995 mSDsluCounter, 13360 SdHoareTripleChecker+Invalid, 13.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8604 mSDsCounter, 3393 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17817 IncrementalHoareTripleChecker+Invalid, 21210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3393 mSolverCounterUnsat, 4756 mSDtfsCounter, 17817 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3444 GetRequests, 2536 SyntacticMatches, 50 SemanticMatches, 858 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50393 ImplicationChecksByTransitivity, 196.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4432occurred in iteration=31, InterpolantAutomatonStates: 569, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 6175 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 4176 NumberOfCodeBlocks, 4164 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 4589 ConstructedInterpolants, 0 QuantifiedInterpolants, 10009 SizeOfPredicates, 32 NumberOfNonLiveVariables, 7593 ConjunctsInSsa, 165 ConjunctsInUnsatCore, 53 InterpolantComputations, 25 PerfectInterpolantSequences, 2299/2587 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: 30.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 21, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 310, DAG_INTERPRETER_EARLY_EXITS: 9, TOOLS_POST_APPLICATIONS: 331, TOOLS_POST_TIME: 18.3s, TOOLS_POST_CALL_APPLICATIONS: 225, TOOLS_POST_CALL_TIME: 5.4s, TOOLS_POST_RETURN_APPLICATIONS: 186, TOOLS_POST_RETURN_TIME: 2.5s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 736, TOOLS_QUANTIFIERELIM_TIME: 26.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 6.7s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 814, FLUID_YES_ANSWERS: 2, DOMAIN_JOIN_APPLICATIONS: 249, DOMAIN_JOIN_TIME: 3.0s, DOMAIN_ALPHA_APPLICATIONS: 2, DOMAIN_ALPHA_TIME: 0.1s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 310, DOMAIN_ISBOTTOM_TIME: 0.4s, LOOP_SUMMARIZER_APPLICATIONS: 6, LOOP_SUMMARIZER_CACHE_MISSES: 6, LOOP_SUMMARIZER_OVERALL_TIME: 5.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 5.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 186, CALL_SUMMARIZER_CACHE_MISSES: 18, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.2s, DAG_COMPRESSION_PROCESSED_NODES: 25171, DAG_COMPRESSION_RETAINED_NODES: 906, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 07:30:44,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c0a0655-144f-4005-a72d-2c5a7d7a8aac/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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