./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW --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 a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 --- 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-4e7fbc6 [2022-11-23 13:49:38,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:49:38,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:49:38,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:49:38,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:49:38,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:49:38,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:49:38,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:49:38,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:49:38,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:49:38,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:49:38,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:49:38,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:49:38,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:49:38,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:49:38,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:49:38,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:49:38,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:49:38,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:49:38,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:49:38,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:49:38,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:49:38,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:49:38,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:49:38,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:49:38,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:49:38,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:49:38,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:49:38,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:49:38,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:49:38,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:49:38,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:49:38,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:49:38,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:49:38,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:49:38,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:49:38,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:49:38,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:49:38,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:49:38,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:49:38,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:49:38,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:49:38,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:49:38,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:49:38,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:49:38,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:49:38,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:49:38,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:49:38,480 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:49:38,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:49:38,481 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:49:38,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:49:38,481 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:49:38,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:49:38,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:49:38,482 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:49:38,482 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:49:38,483 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:49:38,483 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:49:38,483 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:49:38,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:49:38,484 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:49:38,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:49:38,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:49:38,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:49:38,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:49:38,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:49:38,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:49:38,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:49:38,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:49:38,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:49:38,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:49:38,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:49:38,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:49:38,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:49:38,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:49:38,488 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:49:38,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:49:38,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:49:38,489 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:49:38,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:49:38,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:49:38,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:49:38,489 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_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 [2022-11-23 13:49:38,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:49:38,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:49:38,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:49:38,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:49:38,833 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:49:38,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-11-23 13:49:41,951 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:49:42,183 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:49:42,183 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-11-23 13:49:42,204 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/data/031c5a52d/3ff8dbcb6256475895ef4dfbe04b3bbd/FLAGa4071d4ca [2022-11-23 13:49:42,219 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/data/031c5a52d/3ff8dbcb6256475895ef4dfbe04b3bbd [2022-11-23 13:49:42,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:49:42,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:49:42,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:49:42,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:49:42,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:49:42,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ee9887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42, skipping insertion in model container [2022-11-23 13:49:42,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:49:42,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:49:42,438 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_a40ad004-0a32-4136-8d67-6a9611e2c61b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[914,927] [2022-11-23 13:49:42,489 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_a40ad004-0a32-4136-8d67-6a9611e2c61b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[7115,7128] [2022-11-23 13:49:42,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:49:42,556 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:49:42,569 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_a40ad004-0a32-4136-8d67-6a9611e2c61b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[914,927] [2022-11-23 13:49:42,608 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_a40ad004-0a32-4136-8d67-6a9611e2c61b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[7115,7128] [2022-11-23 13:49:42,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:49:42,716 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:49:42,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42 WrapperNode [2022-11-23 13:49:42,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:49:42,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:49:42,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:49:42,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:49:42,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,776 INFO L138 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 581 [2022-11-23 13:49:42,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:49:42,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:49:42,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:49:42,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:49:42,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:49:42,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:49:42,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:49:42,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:49:42,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (1/1) ... [2022-11-23 13:49:42,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:49:42,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:42,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:49:42,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:49:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:49:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 13:49:42,957 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 13:49:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 13:49:42,958 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 13:49:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 13:49:42,958 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 13:49:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 13:49:42,958 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 13:49:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 13:49:42,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 13:49:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 13:49:42,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 13:49:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 13:49:42,959 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 13:49:42,959 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 13:49:42,960 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 13:49:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 13:49:42,960 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 13:49:42,960 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 13:49:42,961 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 13:49:42,961 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 13:49:42,961 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 13:49:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:49:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 13:49:42,962 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 13:49:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 13:49:42,963 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 13:49:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:49:42,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:49:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 13:49:42,964 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 13:49:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 13:49:42,965 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 13:49:43,141 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:49:43,143 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:49:43,903 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:49:44,232 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:49:44,232 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-23 13:49:44,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:44 BoogieIcfgContainer [2022-11-23 13:49:44,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:49:44,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:49:44,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:49:44,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:49:44,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:49:42" (1/3) ... [2022-11-23 13:49:44,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f19f52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:44, skipping insertion in model container [2022-11-23 13:49:44,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:42" (2/3) ... [2022-11-23 13:49:44,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f19f52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:44, skipping insertion in model container [2022-11-23 13:49:44,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:44" (3/3) ... [2022-11-23 13:49:44,246 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-11-23 13:49:44,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:49:44,268 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:49:44,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:49:44,352 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;@751241e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:49:44,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:49:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 134 states have internal predecessors, (191), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-23 13:49:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 13:49:44,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:44,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:44,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1303704914, now seen corresponding path program 1 times [2022-11-23 13:49:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:44,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834890588] [2022-11-23 13:49:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:45,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834890588] [2022-11-23 13:49:45,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834890588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:45,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:45,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:49:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797813891] [2022-11-23 13:49:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:49:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:49:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:49:45,140 INFO L87 Difference]: Start difference. First operand has 178 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 134 states have internal predecessors, (191), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:49:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:46,038 INFO L93 Difference]: Finished difference Result 412 states and 586 transitions. [2022-11-23 13:49:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:49:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-23 13:49:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:46,052 INFO L225 Difference]: With dead ends: 412 [2022-11-23 13:49:46,053 INFO L226 Difference]: Without dead ends: 237 [2022-11-23 13:49:46,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:49:46,061 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 391 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:46,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 646 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:49:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-23 13:49:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-11-23 13:49:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 160 states have (on average 1.4125) internal successors, (226), 165 states have internal predecessors, (226), 42 states have call successors, (42), 22 states have call predecessors, (42), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-23 13:49:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2022-11-23 13:49:46,129 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 45 [2022-11-23 13:49:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:46,130 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2022-11-23 13:49:46,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:49:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2022-11-23 13:49:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 13:49:46,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:46,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:46,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:49:46,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash 812664828, now seen corresponding path program 1 times [2022-11-23 13:49:46,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:46,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800185354] [2022-11-23 13:49:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:46,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:46,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800185354] [2022-11-23 13:49:46,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800185354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:46,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:46,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:49:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721003959] [2022-11-23 13:49:46,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:46,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:46,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:46,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:46,199 INFO L87 Difference]: Start difference. First operand 224 states and 306 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:49:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:46,315 INFO L93 Difference]: Finished difference Result 449 states and 593 transitions. [2022-11-23 13:49:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-23 13:49:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:46,324 INFO L225 Difference]: With dead ends: 449 [2022-11-23 13:49:46,325 INFO L226 Difference]: Without dead ends: 333 [2022-11-23 13:49:46,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:46,332 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 217 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:46,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 272 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:49:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-23 13:49:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 319. [2022-11-23 13:49:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 225 states have (on average 1.36) internal successors, (306), 230 states have internal predecessors, (306), 58 states have call successors, (58), 36 states have call predecessors, (58), 34 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-23 13:49:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 418 transitions. [2022-11-23 13:49:46,400 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 418 transitions. Word has length 46 [2022-11-23 13:49:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:46,401 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 418 transitions. [2022-11-23 13:49:46,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:49:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 418 transitions. [2022-11-23 13:49:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 13:49:46,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:46,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:46,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:49:46,409 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:46,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1468698462, now seen corresponding path program 1 times [2022-11-23 13:49:46,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:46,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088024828] [2022-11-23 13:49:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:46,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088024828] [2022-11-23 13:49:46,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088024828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:46,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:46,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:49:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087507790] [2022-11-23 13:49:46,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:46,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:49:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:49:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:49:46,535 INFO L87 Difference]: Start difference. First operand 319 states and 418 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:49:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:47,255 INFO L93 Difference]: Finished difference Result 767 states and 1117 transitions. [2022-11-23 13:49:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:49:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 44 [2022-11-23 13:49:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:47,261 INFO L225 Difference]: With dead ends: 767 [2022-11-23 13:49:47,261 INFO L226 Difference]: Without dead ends: 669 [2022-11-23 13:49:47,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:49:47,264 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 713 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:47,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 774 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:49:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-23 13:49:47,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 656. [2022-11-23 13:49:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 485 states have (on average 1.4061855670103092) internal successors, (682), 493 states have internal predecessors, (682), 111 states have call successors, (111), 60 states have call predecessors, (111), 58 states have return successors, (137), 104 states have call predecessors, (137), 107 states have call successors, (137) [2022-11-23 13:49:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 930 transitions. [2022-11-23 13:49:47,338 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 930 transitions. Word has length 44 [2022-11-23 13:49:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:47,339 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 930 transitions. [2022-11-23 13:49:47,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:49:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 930 transitions. [2022-11-23 13:49:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 13:49:47,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:47,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:47,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:49:47,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1722193966, now seen corresponding path program 1 times [2022-11-23 13:49:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:47,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267362859] [2022-11-23 13:49:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:47,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:47,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267362859] [2022-11-23 13:49:47,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267362859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:47,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:47,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:49:47,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512733876] [2022-11-23 13:49:47,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:47,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:47,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:47,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:47,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:47,392 INFO L87 Difference]: Start difference. First operand 656 states and 930 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:49:47,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:47,561 INFO L93 Difference]: Finished difference Result 1020 states and 1378 transitions. [2022-11-23 13:49:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-23 13:49:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:47,567 INFO L225 Difference]: With dead ends: 1020 [2022-11-23 13:49:47,567 INFO L226 Difference]: Without dead ends: 810 [2022-11-23 13:49:47,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:47,569 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 68 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:47,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 392 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:49:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-23 13:49:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 806. [2022-11-23 13:49:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 590 states have (on average 1.3847457627118644) internal successors, (817), 598 states have internal predecessors, (817), 135 states have call successors, (135), 81 states have call predecessors, (135), 79 states have return successors, (161), 128 states have call predecessors, (161), 131 states have call successors, (161) [2022-11-23 13:49:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1113 transitions. [2022-11-23 13:49:47,673 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1113 transitions. Word has length 47 [2022-11-23 13:49:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:47,674 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1113 transitions. [2022-11-23 13:49:47,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:49:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1113 transitions. [2022-11-23 13:49:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 13:49:47,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:47,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:47,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:49:47,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash 829797201, now seen corresponding path program 1 times [2022-11-23 13:49:47,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:47,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278342530] [2022-11-23 13:49:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:47,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:47,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:47,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278342530] [2022-11-23 13:49:47,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278342530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:47,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:47,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:49:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630363179] [2022-11-23 13:49:47,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:47,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:47,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:47,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:47,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:47,726 INFO L87 Difference]: Start difference. First operand 806 states and 1113 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:49:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:47,897 INFO L93 Difference]: Finished difference Result 1230 states and 1635 transitions. [2022-11-23 13:49:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-23 13:49:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:47,902 INFO L225 Difference]: With dead ends: 1230 [2022-11-23 13:49:47,903 INFO L226 Difference]: Without dead ends: 869 [2022-11-23 13:49:47,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:47,905 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 217 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:47,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 279 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:49:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-23 13:49:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 857. [2022-11-23 13:49:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 626 states have (on average 1.3722044728434504) internal successors, (859), 634 states have internal predecessors, (859), 143 states have call successors, (143), 88 states have call predecessors, (143), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-11-23 13:49:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1171 transitions. [2022-11-23 13:49:47,985 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1171 transitions. Word has length 53 [2022-11-23 13:49:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:47,985 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1171 transitions. [2022-11-23 13:49:47,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:49:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1171 transitions. [2022-11-23 13:49:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 13:49:47,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:47,987 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:47,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:49:47,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash -562461094, now seen corresponding path program 1 times [2022-11-23 13:49:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836832506] [2022-11-23 13:49:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:48,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:48,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836832506] [2022-11-23 13:49:48,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836832506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:48,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:48,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:49:48,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246203147] [2022-11-23 13:49:48,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:49:48,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:49:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:49:48,080 INFO L87 Difference]: Start difference. First operand 857 states and 1171 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:49:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:48,432 INFO L93 Difference]: Finished difference Result 966 states and 1303 transitions. [2022-11-23 13:49:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:49:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 13:49:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:48,438 INFO L225 Difference]: With dead ends: 966 [2022-11-23 13:49:48,439 INFO L226 Difference]: Without dead ends: 963 [2022-11-23 13:49:48,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:49:48,440 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 392 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:48,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 258 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:49:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-11-23 13:49:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 856. [2022-11-23 13:49:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 626 states have (on average 1.3674121405750799) internal successors, (856), 633 states have internal predecessors, (856), 142 states have call successors, (142), 88 states have call predecessors, (142), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-11-23 13:49:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1167 transitions. [2022-11-23 13:49:48,537 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1167 transitions. Word has length 54 [2022-11-23 13:49:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:48,538 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1167 transitions. [2022-11-23 13:49:48,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:49:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1167 transitions. [2022-11-23 13:49:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 13:49:48,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:48,540 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:48,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:49:48,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash -257299269, now seen corresponding path program 1 times [2022-11-23 13:49:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:48,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770575490] [2022-11-23 13:49:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:48,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:48,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770575490] [2022-11-23 13:49:48,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770575490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152055424] [2022-11-23 13:49:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:48,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:48,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:48,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:48,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:49:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:49:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:49,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:49,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152055424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426435439] [2022-11-23 13:49:49,431 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 13:49:49,432 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:49,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:49,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:49,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:53,106 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-11-23 13:49:53,130 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 121 for LOIs [2022-11-23 13:49:53,150 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-11-23 13:49:53,591 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-11-23 13:49:53,648 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-11-23 13:49:53,731 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-11-23 13:49:53,761 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-11-23 13:49:53,790 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1426435439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:09,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:09,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-23 13:50:09,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364193660] [2022-11-23 13:50:09,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:09,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 13:50:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 13:50:09,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 13:50:09,278 INFO L87 Difference]: Start difference. First operand 856 states and 1167 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 13:50:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:32,716 INFO L93 Difference]: Finished difference Result 1315 states and 1714 transitions. [2022-11-23 13:50:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 13:50:32,717 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-23 13:50:32,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:32,722 INFO L225 Difference]: With dead ends: 1315 [2022-11-23 13:50:32,724 INFO L226 Difference]: Without dead ends: 905 [2022-11-23 13:50:32,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 13:50:32,728 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 173 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 4732 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 4895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 4732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:32,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 2577 Invalid, 4895 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [163 Valid, 4732 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-23 13:50:32,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-23 13:50:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 890. [2022-11-23 13:50:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 652 states have (on average 1.3558282208588956) internal successors, (884), 659 states have internal predecessors, (884), 144 states have call successors, (144), 94 states have call predecessors, (144), 92 states have return successors, (171), 138 states have call predecessors, (171), 141 states have call successors, (171) [2022-11-23 13:50:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1199 transitions. [2022-11-23 13:50:32,837 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1199 transitions. Word has length 55 [2022-11-23 13:50:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:32,837 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1199 transitions. [2022-11-23 13:50:32,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 13:50:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1199 transitions. [2022-11-23 13:50:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 13:50:32,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:32,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:32,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:33,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 13:50:33,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash -802950204, now seen corresponding path program 1 times [2022-11-23 13:50:33,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176838508] [2022-11-23 13:50:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:50:33,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176838508] [2022-11-23 13:50:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176838508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:33,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:50:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366934515] [2022-11-23 13:50:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:33,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:33,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:33,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:33,110 INFO L87 Difference]: Start difference. First operand 890 states and 1199 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:50:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:33,327 INFO L93 Difference]: Finished difference Result 1341 states and 1755 transitions. [2022-11-23 13:50:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 13:50:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:33,334 INFO L225 Difference]: With dead ends: 1341 [2022-11-23 13:50:33,334 INFO L226 Difference]: Without dead ends: 1073 [2022-11-23 13:50:33,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:33,336 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:33,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 439 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:50:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-11-23 13:50:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 944. [2022-11-23 13:50:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 696 states have (on average 1.3548850574712643) internal successors, (943), 703 states have internal predecessors, (943), 149 states have call successors, (149), 99 states have call predecessors, (149), 97 states have return successors, (176), 143 states have call predecessors, (176), 146 states have call successors, (176) [2022-11-23 13:50:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1268 transitions. [2022-11-23 13:50:33,453 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1268 transitions. Word has length 61 [2022-11-23 13:50:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:33,453 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1268 transitions. [2022-11-23 13:50:33,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:50:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1268 transitions. [2022-11-23 13:50:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 13:50:33,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:33,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:33,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:50:33,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash -926220964, now seen corresponding path program 1 times [2022-11-23 13:50:33,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:33,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049009941] [2022-11-23 13:50:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:33,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:50:33,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:33,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049009941] [2022-11-23 13:50:33,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049009941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:33,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:33,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:50:33,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863265724] [2022-11-23 13:50:33,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:33,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:50:33,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:50:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:50:33,624 INFO L87 Difference]: Start difference. First operand 944 states and 1268 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:50:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:34,305 INFO L93 Difference]: Finished difference Result 1624 states and 2085 transitions. [2022-11-23 13:50:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:50:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-23 13:50:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:34,312 INFO L225 Difference]: With dead ends: 1624 [2022-11-23 13:50:34,312 INFO L226 Difference]: Without dead ends: 1207 [2022-11-23 13:50:34,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:50:34,315 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 352 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:34,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 602 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:50:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-23 13:50:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1172. [2022-11-23 13:50:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 849 states have (on average 1.3262661955241462) internal successors, (1126), 856 states have internal predecessors, (1126), 189 states have call successors, (189), 134 states have call predecessors, (189), 132 states have return successors, (216), 183 states have call predecessors, (216), 186 states have call successors, (216) [2022-11-23 13:50:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1531 transitions. [2022-11-23 13:50:34,459 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1531 transitions. Word has length 63 [2022-11-23 13:50:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:34,460 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1531 transitions. [2022-11-23 13:50:34,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:50:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1531 transitions. [2022-11-23 13:50:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 13:50:34,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:34,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:34,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:50:34,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1131049379, now seen corresponding path program 1 times [2022-11-23 13:50:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002359815] [2022-11-23 13:50:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:34,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:50:34,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002359815] [2022-11-23 13:50:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002359815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994908950] [2022-11-23 13:50:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:34,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:34,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:34,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:34,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:50:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:50:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:50:34,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:50:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994908950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978230934] [2022-11-23 13:50:35,138 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 13:50:35,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:35,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:35,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:35,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:41,043 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-11-23 13:50:41,058 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-11-23 13:50:41,092 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 164 for LOIs [2022-11-23 13:50:41,132 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-11-23 13:50:41,403 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-11-23 13:50:41,433 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-11-23 13:50:41,467 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-11-23 13:50:41,500 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-11-23 13:50:41,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:51:00,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24278#(and (= ~q_req_up~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:51:00,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:51:00,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:51:00,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 13:51:00,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792651726] [2022-11-23 13:51:00,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:51:00,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:51:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:51:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 13:51:00,575 INFO L87 Difference]: Start difference. First operand 1172 states and 1531 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 13:51:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:01,354 INFO L93 Difference]: Finished difference Result 2717 states and 3398 transitions. [2022-11-23 13:51:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:51:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-23 13:51:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:01,367 INFO L225 Difference]: With dead ends: 2717 [2022-11-23 13:51:01,367 INFO L226 Difference]: Without dead ends: 2714 [2022-11-23 13:51:01,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 13:51:01,370 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 480 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:01,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1022 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:51:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-11-23 13:51:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1912. [2022-11-23 13:51:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1367 states have (on average 1.3050475493782003) internal successors, (1784), 1374 states have internal predecessors, (1784), 307 states have call successors, (307), 238 states have call predecessors, (307), 236 states have return successors, (334), 301 states have call predecessors, (334), 304 states have call successors, (334) [2022-11-23 13:51:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2425 transitions. [2022-11-23 13:51:01,654 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2425 transitions. Word has length 64 [2022-11-23 13:51:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:01,655 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 2425 transitions. [2022-11-23 13:51:01,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 13:51:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2425 transitions. [2022-11-23 13:51:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 13:51:01,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:01,660 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:01,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:01,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:01,866 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash -875100124, now seen corresponding path program 2 times [2022-11-23 13:51:01,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:01,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760677670] [2022-11-23 13:51:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:01,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:51:01,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760677670] [2022-11-23 13:51:01,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760677670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:01,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:01,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:01,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433261228] [2022-11-23 13:51:01,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:01,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:01,918 INFO L87 Difference]: Start difference. First operand 1912 states and 2425 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:51:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:02,210 INFO L93 Difference]: Finished difference Result 2680 states and 3357 transitions. [2022-11-23 13:51:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:02,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-23 13:51:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:02,217 INFO L225 Difference]: With dead ends: 2680 [2022-11-23 13:51:02,217 INFO L226 Difference]: Without dead ends: 1490 [2022-11-23 13:51:02,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:02,221 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 217 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:02,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 315 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-11-23 13:51:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1480. [2022-11-23 13:51:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1063 states have (on average 1.303857008466604) internal successors, (1386), 1070 states have internal predecessors, (1386), 239 states have call successors, (239), 178 states have call predecessors, (239), 176 states have return successors, (266), 233 states have call predecessors, (266), 236 states have call successors, (266) [2022-11-23 13:51:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1891 transitions. [2022-11-23 13:51:02,445 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1891 transitions. Word has length 67 [2022-11-23 13:51:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:02,445 INFO L495 AbstractCegarLoop]: Abstraction has 1480 states and 1891 transitions. [2022-11-23 13:51:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:51:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1891 transitions. [2022-11-23 13:51:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 13:51:02,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:02,454 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:02,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:51:02,455 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:02,455 INFO L85 PathProgramCache]: Analyzing trace with hash -20305958, now seen corresponding path program 1 times [2022-11-23 13:51:02,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:02,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364614832] [2022-11-23 13:51:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:02,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:51:02,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364614832] [2022-11-23 13:51:02,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364614832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:02,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:02,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:02,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387253813] [2022-11-23 13:51:02,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:02,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:02,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:02,507 INFO L87 Difference]: Start difference. First operand 1480 states and 1891 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:51:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:02,827 INFO L93 Difference]: Finished difference Result 2511 states and 3124 transitions. [2022-11-23 13:51:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-23 13:51:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:02,835 INFO L225 Difference]: With dead ends: 2511 [2022-11-23 13:51:02,835 INFO L226 Difference]: Without dead ends: 1654 [2022-11-23 13:51:02,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:02,840 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 39 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:02,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 430 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-11-23 13:51:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1525. [2022-11-23 13:51:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1100 states have (on average 1.3) internal successors, (1430), 1107 states have internal predecessors, (1430), 243 states have call successors, (243), 182 states have call predecessors, (243), 180 states have return successors, (270), 237 states have call predecessors, (270), 240 states have call successors, (270) [2022-11-23 13:51:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 1943 transitions. [2022-11-23 13:51:03,069 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 1943 transitions. Word has length 71 [2022-11-23 13:51:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:03,069 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 1943 transitions. [2022-11-23 13:51:03,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:51:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 1943 transitions. [2022-11-23 13:51:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 13:51:03,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:03,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:03,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 13:51:03,072 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:03,073 INFO L85 PathProgramCache]: Analyzing trace with hash -729284993, now seen corresponding path program 1 times [2022-11-23 13:51:03,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:03,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453892790] [2022-11-23 13:51:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:03,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:51:03,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453892790] [2022-11-23 13:51:03,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453892790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857247500] [2022-11-23 13:51:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:03,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:03,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:03,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:03,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:51:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:51:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:51:03,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:03,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857247500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:03,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:51:03,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:51:03,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588726380] [2022-11-23 13:51:03,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:03,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:03,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:51:03,378 INFO L87 Difference]: Start difference. First operand 1525 states and 1943 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-11-23 13:51:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:03,716 INFO L93 Difference]: Finished difference Result 2379 states and 3279 transitions. [2022-11-23 13:51:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 81 [2022-11-23 13:51:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:03,728 INFO L225 Difference]: With dead ends: 2379 [2022-11-23 13:51:03,729 INFO L226 Difference]: Without dead ends: 1944 [2022-11-23 13:51:03,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:51:03,732 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 208 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:03,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 323 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-11-23 13:51:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1935. [2022-11-23 13:51:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1418 states have (on average 1.3293370944992948) internal successors, (1885), 1428 states have internal predecessors, (1885), 305 states have call successors, (305), 212 states have call predecessors, (305), 210 states have return successors, (358), 296 states have call predecessors, (358), 302 states have call successors, (358) [2022-11-23 13:51:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2548 transitions. [2022-11-23 13:51:04,006 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2548 transitions. Word has length 81 [2022-11-23 13:51:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:04,007 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 2548 transitions. [2022-11-23 13:51:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-11-23 13:51:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2548 transitions. [2022-11-23 13:51:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 13:51:04,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:04,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:04,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:04,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 13:51:04,218 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash 366430879, now seen corresponding path program 1 times [2022-11-23 13:51:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:04,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89251915] [2022-11-23 13:51:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:51:04,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:04,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89251915] [2022-11-23 13:51:04,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89251915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:04,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026855326] [2022-11-23 13:51:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:04,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:04,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:04,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:04,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:51:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:51:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 13:51:04,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:04,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026855326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:04,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:51:04,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:51:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111772472] [2022-11-23 13:51:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:04,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:51:04,523 INFO L87 Difference]: Start difference. First operand 1935 states and 2548 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-23 13:51:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:04,936 INFO L93 Difference]: Finished difference Result 3594 states and 5114 transitions. [2022-11-23 13:51:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 81 [2022-11-23 13:51:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:04,952 INFO L225 Difference]: With dead ends: 3594 [2022-11-23 13:51:04,953 INFO L226 Difference]: Without dead ends: 2749 [2022-11-23 13:51:04,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:51:04,958 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 211 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:04,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 323 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2022-11-23 13:51:05,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2735. [2022-11-23 13:51:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2039 states have (on average 1.356056890632663) internal successors, (2765), 2055 states have internal predecessors, (2765), 424 states have call successors, (424), 272 states have call predecessors, (424), 270 states have return successors, (525), 409 states have call predecessors, (525), 421 states have call successors, (525) [2022-11-23 13:51:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3714 transitions. [2022-11-23 13:51:05,312 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3714 transitions. Word has length 81 [2022-11-23 13:51:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:05,312 INFO L495 AbstractCegarLoop]: Abstraction has 2735 states and 3714 transitions. [2022-11-23 13:51:05,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-23 13:51:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3714 transitions. [2022-11-23 13:51:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 13:51:05,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:05,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:05,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 13:51:05,524 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:05,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1086524031, now seen corresponding path program 1 times [2022-11-23 13:51:05,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:05,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133131957] [2022-11-23 13:51:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 13:51:05,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:05,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133131957] [2022-11-23 13:51:05,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133131957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:05,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:05,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:05,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298876046] [2022-11-23 13:51:05,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:05,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:05,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:05,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:05,600 INFO L87 Difference]: Start difference. First operand 2735 states and 3714 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:51:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:06,038 INFO L93 Difference]: Finished difference Result 4435 states and 6329 transitions. [2022-11-23 13:51:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:06,039 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, (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 81 [2022-11-23 13:51:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:06,055 INFO L225 Difference]: With dead ends: 4435 [2022-11-23 13:51:06,056 INFO L226 Difference]: Without dead ends: 3111 [2022-11-23 13:51:06,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:06,064 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 56 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:06,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 459 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-23 13:51:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2939. [2022-11-23 13:51:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2227 states have (on average 1.3834755276156263) internal successors, (3081), 2243 states have internal predecessors, (3081), 432 states have call successors, (432), 280 states have call predecessors, (432), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-11-23 13:51:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 4046 transitions. [2022-11-23 13:51:06,489 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 4046 transitions. Word has length 81 [2022-11-23 13:51:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:06,489 INFO L495 AbstractCegarLoop]: Abstraction has 2939 states and 4046 transitions. [2022-11-23 13:51:06,490 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:51:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 4046 transitions. [2022-11-23 13:51:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 13:51:06,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:06,497 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:06,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 13:51:06,498 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash -549750117, now seen corresponding path program 1 times [2022-11-23 13:51:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:06,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636641904] [2022-11-23 13:51:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:06,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:51:06,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:06,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636641904] [2022-11-23 13:51:06,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636641904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:06,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216646990] [2022-11-23 13:51:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:06,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:06,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:06,896 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:51:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:51:07,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:51:07,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:07,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216646990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:07,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:51:07,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-23 13:51:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081196718] [2022-11-23 13:51:07,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:51:07,104 INFO L87 Difference]: Start difference. First operand 2939 states and 4046 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:51:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:07,567 INFO L93 Difference]: Finished difference Result 3768 states and 5064 transitions. [2022-11-23 13:51:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 13:51:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:07,584 INFO L225 Difference]: With dead ends: 3768 [2022-11-23 13:51:07,585 INFO L226 Difference]: Without dead ends: 2968 [2022-11-23 13:51:07,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:51:07,589 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 47 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:07,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 442 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2022-11-23 13:51:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2935. [2022-11-23 13:51:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2223 states have (on average 1.369770580296896) internal successors, (3045), 2239 states have internal predecessors, (3045), 432 states have call successors, (432), 280 states have call predecessors, (432), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-11-23 13:51:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 4010 transitions. [2022-11-23 13:51:08,073 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 4010 transitions. Word has length 102 [2022-11-23 13:51:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:08,073 INFO L495 AbstractCegarLoop]: Abstraction has 2935 states and 4010 transitions. [2022-11-23 13:51:08,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:51:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 4010 transitions. [2022-11-23 13:51:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 13:51:08,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:08,079 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:08,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:08,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 13:51:08,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:08,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1026807642, now seen corresponding path program 1 times [2022-11-23 13:51:08,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:08,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346191250] [2022-11-23 13:51:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:08,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 13:51:08,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:08,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346191250] [2022-11-23 13:51:08,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346191250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789457133] [2022-11-23 13:51:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:08,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:08,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:08,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:51:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:51:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:51:08,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:08,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789457133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:08,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:51:08,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 13:51:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70004160] [2022-11-23 13:51:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:08,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:51:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:08,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:51:08,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:51:08,903 INFO L87 Difference]: Start difference. First operand 2935 states and 4010 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:51:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:09,440 INFO L93 Difference]: Finished difference Result 3819 states and 5080 transitions. [2022-11-23 13:51:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:51:09,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 13:51:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:09,471 INFO L225 Difference]: With dead ends: 3819 [2022-11-23 13:51:09,472 INFO L226 Difference]: Without dead ends: 2766 [2022-11-23 13:51:09,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:51:09,476 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 209 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:09,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 989 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:51:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-11-23 13:51:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2569. [2022-11-23 13:51:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 1989 states have (on average 1.3926596279537455) internal successors, (2770), 2005 states have internal predecessors, (2770), 361 states have call successors, (361), 219 states have call predecessors, (361), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-11-23 13:51:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3593 transitions. [2022-11-23 13:51:09,805 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3593 transitions. Word has length 102 [2022-11-23 13:51:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:09,805 INFO L495 AbstractCegarLoop]: Abstraction has 2569 states and 3593 transitions. [2022-11-23 13:51:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:51:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3593 transitions. [2022-11-23 13:51:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:51:09,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:09,813 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:09,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:10,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 13:51:10,020 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:10,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1000272319, now seen corresponding path program 1 times [2022-11-23 13:51:10,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:10,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111965485] [2022-11-23 13:51:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 13:51:10,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:10,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111965485] [2022-11-23 13:51:10,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111965485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:10,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:10,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:51:10,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852638223] [2022-11-23 13:51:10,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:10,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:51:10,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:51:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:51:10,099 INFO L87 Difference]: Start difference. First operand 2569 states and 3593 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 13:51:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:10,598 INFO L93 Difference]: Finished difference Result 3188 states and 4335 transitions. [2022-11-23 13:51:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:51:10,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2022-11-23 13:51:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:10,609 INFO L225 Difference]: With dead ends: 3188 [2022-11-23 13:51:10,610 INFO L226 Difference]: Without dead ends: 2568 [2022-11-23 13:51:10,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:51:10,613 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 269 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:10,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 395 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:51:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2022-11-23 13:51:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2559. [2022-11-23 13:51:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1979 states have (on average 1.3815058110156644) internal successors, (2734), 1995 states have internal predecessors, (2734), 361 states have call successors, (361), 219 states have call predecessors, (361), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-11-23 13:51:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3557 transitions. [2022-11-23 13:51:10,962 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3557 transitions. Word has length 112 [2022-11-23 13:51:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:10,962 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 3557 transitions. [2022-11-23 13:51:10,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 13:51:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3557 transitions. [2022-11-23 13:51:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:51:10,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:10,970 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:10,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 13:51:10,971 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash 893169856, now seen corresponding path program 1 times [2022-11-23 13:51:10,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:10,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417690712] [2022-11-23 13:51:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 13:51:11,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:11,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417690712] [2022-11-23 13:51:11,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417690712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:11,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293587741] [2022-11-23 13:51:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:11,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:11,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:11,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:11,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:51:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:11,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:51:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:51:11,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:11,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293587741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:11,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:51:11,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 13:51:11,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191066143] [2022-11-23 13:51:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:51:11,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:51:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 13:51:11,390 INFO L87 Difference]: Start difference. First operand 2559 states and 3557 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:51:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:11,956 INFO L93 Difference]: Finished difference Result 3108 states and 4182 transitions. [2022-11-23 13:51:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:51:11,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 13:51:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:11,971 INFO L225 Difference]: With dead ends: 3108 [2022-11-23 13:51:11,971 INFO L226 Difference]: Without dead ends: 2515 [2022-11-23 13:51:11,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:51:11,974 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 67 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:11,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1339 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:51:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-11-23 13:51:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2423. [2022-11-23 13:51:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 1879 states have (on average 1.3927621075039915) internal successors, (2617), 1895 states have internal predecessors, (2617), 342 states have call successors, (342), 202 states have call predecessors, (342), 200 states have return successors, (443), 327 states have call predecessors, (443), 339 states have call successors, (443) [2022-11-23 13:51:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3402 transitions. [2022-11-23 13:51:12,289 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3402 transitions. Word has length 112 [2022-11-23 13:51:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:12,289 INFO L495 AbstractCegarLoop]: Abstraction has 2423 states and 3402 transitions. [2022-11-23 13:51:12,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:51:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3402 transitions. [2022-11-23 13:51:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 13:51:12,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:12,297 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:12,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:12,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:12,516 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1972336602, now seen corresponding path program 1 times [2022-11-23 13:51:12,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:12,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285511392] [2022-11-23 13:51:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:12,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 13:51:12,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:12,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285511392] [2022-11-23 13:51:12,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285511392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:12,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857086437] [2022-11-23 13:51:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:12,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:12,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:12,690 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:12,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 13:51:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:51:12,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:51:12,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:12,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857086437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:12,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:51:12,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 13:51:12,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204287728] [2022-11-23 13:51:12,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:12,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:51:12,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:51:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:51:12,901 INFO L87 Difference]: Start difference. First operand 2423 states and 3402 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:51:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:13,375 INFO L93 Difference]: Finished difference Result 3172 states and 4247 transitions. [2022-11-23 13:51:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:51:13,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 13:51:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:13,386 INFO L225 Difference]: With dead ends: 3172 [2022-11-23 13:51:13,386 INFO L226 Difference]: Without dead ends: 2715 [2022-11-23 13:51:13,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:51:13,389 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 193 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:13,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 998 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:51:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2022-11-23 13:51:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2681. [2022-11-23 13:51:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2041 states have (on average 1.370406663400294) internal successors, (2797), 2063 states have internal predecessors, (2797), 390 states have call successors, (390), 244 states have call predecessors, (390), 248 states have return successors, (503), 375 states have call predecessors, (503), 387 states have call successors, (503) [2022-11-23 13:51:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3690 transitions. [2022-11-23 13:51:13,662 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3690 transitions. Word has length 113 [2022-11-23 13:51:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:13,662 INFO L495 AbstractCegarLoop]: Abstraction has 2681 states and 3690 transitions. [2022-11-23 13:51:13,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:51:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3690 transitions. [2022-11-23 13:51:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 13:51:13,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:13,671 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, 1, 1, 1] [2022-11-23 13:51:13,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:13,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:13,882 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:13,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1479902674, now seen corresponding path program 1 times [2022-11-23 13:51:13,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:13,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877324499] [2022-11-23 13:51:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:13,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 13:51:13,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877324499] [2022-11-23 13:51:13,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877324499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:13,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:13,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340416418] [2022-11-23 13:51:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:13,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:13,948 INFO L87 Difference]: Start difference. First operand 2681 states and 3690 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:51:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:14,682 INFO L93 Difference]: Finished difference Result 6290 states and 9227 transitions. [2022-11-23 13:51:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:14,683 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, (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 107 [2022-11-23 13:51:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:14,703 INFO L225 Difference]: With dead ends: 6290 [2022-11-23 13:51:14,703 INFO L226 Difference]: Without dead ends: 4441 [2022-11-23 13:51:14,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:14,713 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 205 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:14,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 323 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2022-11-23 13:51:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 4409. [2022-11-23 13:51:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 3405 states have (on average 1.3923641703377385) internal successors, (4741), 3439 states have internal predecessors, (4741), 626 states have call successors, (626), 372 states have call predecessors, (626), 376 states have return successors, (827), 599 states have call predecessors, (827), 623 states have call successors, (827) [2022-11-23 13:51:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 6194 transitions. [2022-11-23 13:51:15,305 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 6194 transitions. Word has length 107 [2022-11-23 13:51:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:15,306 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 6194 transitions. [2022-11-23 13:51:15,306 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:51:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 6194 transitions. [2022-11-23 13:51:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 13:51:15,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:15,316 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:15,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 13:51:15,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1731962658, now seen corresponding path program 1 times [2022-11-23 13:51:15,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:15,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086265095] [2022-11-23 13:51:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:15,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:51:16,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:16,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086265095] [2022-11-23 13:51:16,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086265095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:16,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714375383] [2022-11-23 13:51:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:16,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:16,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:16,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:16,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 13:51:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 13:51:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:51:17,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 13:51:19,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714375383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:19,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516396377] [2022-11-23 13:51:19,380 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 13:51:19,380 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:51:19,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:51:19,381 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:51:19,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:51:45,009 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-11-23 13:51:45,291 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-11-23 13:51:45,326 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 154 for LOIs [2022-11-23 13:51:45,365 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-11-23 13:51:46,569 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-11-23 13:51:46,716 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 78 for LOIs [2022-11-23 13:51:46,839 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-11-23 13:51:47,367 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-23 13:51:47,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:52:26,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130753#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:52:26,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:52:26,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:52:26,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-23 13:52:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025166468] [2022-11-23 13:52:26,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:52:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 13:52:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 13:52:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10763, Unknown=0, NotChecked=0, Total=11556 [2022-11-23 13:52:26,276 INFO L87 Difference]: Start difference. First operand 4409 states and 6194 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-23 13:52:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:50,088 INFO L93 Difference]: Finished difference Result 6920 states and 9110 transitions. [2022-11-23 13:52:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-23 13:52:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-23 13:52:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:50,110 INFO L225 Difference]: With dead ends: 6920 [2022-11-23 13:52:50,110 INFO L226 Difference]: Without dead ends: 6205 [2022-11-23 13:52:50,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44277 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=10080, Invalid=99812, Unknown=0, NotChecked=0, Total=109892 [2022-11-23 13:52:50,138 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 4873 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 7297 mSolverCounterSat, 2600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4873 SdHoareTripleChecker+Valid, 2818 SdHoareTripleChecker+Invalid, 9897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2600 IncrementalHoareTripleChecker+Valid, 7297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:50,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4873 Valid, 2818 Invalid, 9897 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2600 Valid, 7297 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 13:52:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2022-11-23 13:52:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 4685. [2022-11-23 13:52:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3589 states have (on average 1.379771524101421) internal successors, (4952), 3625 states have internal predecessors, (4952), 671 states have call successors, (671), 409 states have call predecessors, (671), 423 states have return successors, (884), 652 states have call predecessors, (884), 668 states have call successors, (884) [2022-11-23 13:52:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6507 transitions. [2022-11-23 13:52:50,774 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6507 transitions. Word has length 114 [2022-11-23 13:52:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:50,775 INFO L495 AbstractCegarLoop]: Abstraction has 4685 states and 6507 transitions. [2022-11-23 13:52:50,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-23 13:52:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6507 transitions. [2022-11-23 13:52:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 13:52:50,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:50,786 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:50,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 13:52:50,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:50,992 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:50,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:50,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1117241275, now seen corresponding path program 1 times [2022-11-23 13:52:50,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657233193] [2022-11-23 13:52:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:52:51,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:51,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657233193] [2022-11-23 13:52:51,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657233193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:51,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705974740] [2022-11-23 13:52:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:51,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:51,350 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:52:51,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 13:52:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:52:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:52:51,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 13:52:51,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705974740] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:51,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:52:51,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 13:52:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265739050] [2022-11-23 13:52:51,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:51,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:52:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:52:51,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:52:51,857 INFO L87 Difference]: Start difference. First operand 4685 states and 6507 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 13:52:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:53,200 INFO L93 Difference]: Finished difference Result 6009 states and 8055 transitions. [2022-11-23 13:52:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 13:52:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 13:52:53,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:53,217 INFO L225 Difference]: With dead ends: 6009 [2022-11-23 13:52:53,218 INFO L226 Difference]: Without dead ends: 5018 [2022-11-23 13:52:53,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 13:52:53,223 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 312 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:53,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 665 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:52:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2022-11-23 13:52:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 4765. [2022-11-23 13:52:53,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 3634 states have (on average 1.3767198679141441) internal successors, (5003), 3673 states have internal predecessors, (5003), 690 states have call successors, (690), 418 states have call predecessors, (690), 439 states have return successors, (924), 675 states have call predecessors, (924), 687 states have call successors, (924) [2022-11-23 13:52:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 6617 transitions. [2022-11-23 13:52:53,997 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 6617 transitions. Word has length 115 [2022-11-23 13:52:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:53,998 INFO L495 AbstractCegarLoop]: Abstraction has 4765 states and 6617 transitions. [2022-11-23 13:52:53,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 13:52:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 6617 transitions. [2022-11-23 13:52:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:52:54,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:54,012 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:54,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 13:52:54,218 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1467232233, now seen corresponding path program 1 times [2022-11-23 13:52:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:54,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554117391] [2022-11-23 13:52:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:54,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 13:52:55,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554117391] [2022-11-23 13:52:55,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554117391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115160434] [2022-11-23 13:52:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:55,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:55,347 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:52:55,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 13:52:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 13:52:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:52:56,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 13:52:58,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115160434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630845123] [2022-11-23 13:52:58,311 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 13:52:58,311 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:52:58,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:52:58,312 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:52:58,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:53:05,833 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-11-23 13:53:06,246 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 161 for LOIs [2022-11-23 13:53:06,281 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 80 for LOIs [2022-11-23 13:53:06,290 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-11-23 13:53:07,525 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-11-23 13:53:07,677 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 80 for LOIs [2022-11-23 13:53:07,850 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-11-23 13:53:08,220 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-23 13:53:08,518 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:53:44,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165091#(and (= ~q_req_up~0 1) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~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) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:53:44,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:53:44,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:53:44,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-23 13:53:44,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925177147] [2022-11-23 13:53:44,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-23 13:53:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:44,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-23 13:53:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=11697, Unknown=0, NotChecked=0, Total=12656 [2022-11-23 13:53:44,217 INFO L87 Difference]: Start difference. First operand 4765 states and 6617 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-23 13:54:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:02,293 INFO L93 Difference]: Finished difference Result 7049 states and 9319 transitions. [2022-11-23 13:54:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-23 13:54:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-23 13:54:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:02,311 INFO L225 Difference]: With dead ends: 7049 [2022-11-23 13:54:02,312 INFO L226 Difference]: Without dead ends: 5978 [2022-11-23 13:54:02,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26860 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=6757, Invalid=62675, Unknown=0, NotChecked=0, Total=69432 [2022-11-23 13:54:02,326 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 4825 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 8061 mSolverCounterSat, 3381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4825 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 11442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3381 IncrementalHoareTripleChecker+Valid, 8061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:02,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4825 Valid, 2875 Invalid, 11442 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3381 Valid, 8061 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 13:54:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2022-11-23 13:54:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 4581. [2022-11-23 13:54:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 3522 states have (on average 1.3841567291311754) internal successors, (4875), 3560 states have internal predecessors, (4875), 650 states have call successors, (650), 386 states have call predecessors, (650), 407 states have return successors, (874), 636 states have call predecessors, (874), 647 states have call successors, (874) [2022-11-23 13:54:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 6399 transitions. [2022-11-23 13:54:03,289 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 6399 transitions. Word has length 124 [2022-11-23 13:54:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:03,289 INFO L495 AbstractCegarLoop]: Abstraction has 4581 states and 6399 transitions. [2022-11-23 13:54:03,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-23 13:54:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 6399 transitions. [2022-11-23 13:54:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 13:54:03,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:03,302 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:03,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:03,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 13:54:03,508 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1169428116, now seen corresponding path program 1 times [2022-11-23 13:54:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:03,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064732908] [2022-11-23 13:54:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:03,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 13:54:03,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:03,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064732908] [2022-11-23 13:54:03,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064732908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:03,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738149562] [2022-11-23 13:54:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:03,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:03,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:03,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:03,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 13:54:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:03,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 13:54:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 13:54:04,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 13:54:04,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738149562] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:04,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:54:04,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 13:54:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448054968] [2022-11-23 13:54:04,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:04,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:54:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:54:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:54:04,305 INFO L87 Difference]: Start difference. First operand 4581 states and 6399 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 13:54:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:05,691 INFO L93 Difference]: Finished difference Result 5236 states and 7140 transitions. [2022-11-23 13:54:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:54:05,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 13:54:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:05,706 INFO L225 Difference]: With dead ends: 5236 [2022-11-23 13:54:05,706 INFO L226 Difference]: Without dead ends: 4349 [2022-11-23 13:54:05,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 13:54:05,711 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 470 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:05,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 591 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:54:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2022-11-23 13:54:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 4312. [2022-11-23 13:54:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 3323 states have (on average 1.393319289798375) internal successors, (4630), 3361 states have internal predecessors, (4630), 614 states have call successors, (614), 356 states have call predecessors, (614), 373 states have return successors, (833), 596 states have call predecessors, (833), 611 states have call successors, (833) [2022-11-23 13:54:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6077 transitions. [2022-11-23 13:54:06,672 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6077 transitions. Word has length 125 [2022-11-23 13:54:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:06,672 INFO L495 AbstractCegarLoop]: Abstraction has 4312 states and 6077 transitions. [2022-11-23 13:54:06,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 13:54:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6077 transitions. [2022-11-23 13:54:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:54:06,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:06,681 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:06,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-23 13:54:06,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:06,888 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash 597626421, now seen corresponding path program 1 times [2022-11-23 13:54:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:06,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172465461] [2022-11-23 13:54:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 13:54:06,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:06,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172465461] [2022-11-23 13:54:06,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172465461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:06,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110103968] [2022-11-23 13:54:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:06,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:06,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:06,997 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:07,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 13:54:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:54:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 13:54:07,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:07,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110103968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:07,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:54:07,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:54:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351584511] [2022-11-23 13:54:07,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:07,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:07,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:07,232 INFO L87 Difference]: Start difference. First operand 4312 states and 6077 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:07,962 INFO L93 Difference]: Finished difference Result 7317 states and 10496 transitions. [2022-11-23 13:54:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 124 [2022-11-23 13:54:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:07,976 INFO L225 Difference]: With dead ends: 7317 [2022-11-23 13:54:07,976 INFO L226 Difference]: Without dead ends: 5197 [2022-11-23 13:54:07,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:07,987 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 200 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:07,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 241 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2022-11-23 13:54:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 5197. [2022-11-23 13:54:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 4093 states have (on average 1.3642804788663572) internal successors, (5584), 4131 states have internal predecessors, (5584), 651 states have call successors, (651), 433 states have call predecessors, (651), 451 states have return successors, (900), 634 states have call predecessors, (900), 648 states have call successors, (900) [2022-11-23 13:54:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 7135 transitions. [2022-11-23 13:54:08,907 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 7135 transitions. Word has length 124 [2022-11-23 13:54:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:08,907 INFO L495 AbstractCegarLoop]: Abstraction has 5197 states and 7135 transitions. [2022-11-23 13:54:08,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 7135 transitions. [2022-11-23 13:54:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:54:08,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:08,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 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] [2022-11-23 13:54:08,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-23 13:54:09,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 13:54:09,127 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash 540482196, now seen corresponding path program 1 times [2022-11-23 13:54:09,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:09,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618586886] [2022-11-23 13:54:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 13:54:09,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:09,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618586886] [2022-11-23 13:54:09,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618586886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:09,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464238153] [2022-11-23 13:54:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:09,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:09,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:09,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:09,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 13:54:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:09,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:54:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 13:54:09,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:09,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464238153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:09,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:54:09,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:54:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045342066] [2022-11-23 13:54:09,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:09,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:09,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:09,440 INFO L87 Difference]: Start difference. First operand 5197 states and 7135 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:10,353 INFO L93 Difference]: Finished difference Result 9198 states and 12997 transitions. [2022-11-23 13:54:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:10,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 124 [2022-11-23 13:54:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:10,376 INFO L225 Difference]: With dead ends: 9198 [2022-11-23 13:54:10,376 INFO L226 Difference]: Without dead ends: 6908 [2022-11-23 13:54:10,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:10,387 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 89 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:10,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 477 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2022-11-23 13:54:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 5795. [2022-11-23 13:54:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 4635 states have (on average 1.397195253505933) internal successors, (6476), 4673 states have internal predecessors, (6476), 679 states have call successors, (679), 461 states have call predecessors, (679), 479 states have return successors, (928), 662 states have call predecessors, (928), 676 states have call successors, (928) [2022-11-23 13:54:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8083 transitions. [2022-11-23 13:54:11,432 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8083 transitions. Word has length 124 [2022-11-23 13:54:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:11,433 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8083 transitions. [2022-11-23 13:54:11,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8083 transitions. [2022-11-23 13:54:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:54:11,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:11,442 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:11,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:11,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 13:54:11,654 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash -373576570, now seen corresponding path program 2 times [2022-11-23 13:54:11,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:11,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526207572] [2022-11-23 13:54:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:11,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-23 13:54:11,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526207572] [2022-11-23 13:54:11,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526207572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775643106] [2022-11-23 13:54:11,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:54:11,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:11,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:11,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 13:54:12,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:54:12,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:54:12,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:54:12,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:54:12,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:12,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775643106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:12,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:54:12,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:54:12,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166711002] [2022-11-23 13:54:12,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:12,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:54:12,083 INFO L87 Difference]: Start difference. First operand 5795 states and 8083 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:54:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:13,168 INFO L93 Difference]: Finished difference Result 10960 states and 15854 transitions. [2022-11-23 13:54:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 124 [2022-11-23 13:54:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:13,203 INFO L225 Difference]: With dead ends: 10960 [2022-11-23 13:54:13,203 INFO L226 Difference]: Without dead ends: 7957 [2022-11-23 13:54:13,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:54:13,214 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 111 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:13,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 487 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2022-11-23 13:54:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7809. [2022-11-23 13:54:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6286 states have (on average 1.4000954502068088) internal successors, (8801), 6332 states have internal predecessors, (8801), 897 states have call successors, (897), 607 states have call predecessors, (897), 624 states have return successors, (1341), 871 states have call predecessors, (1341), 894 states have call successors, (1341) [2022-11-23 13:54:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 11039 transitions. [2022-11-23 13:54:14,219 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 11039 transitions. Word has length 124 [2022-11-23 13:54:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:14,220 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 11039 transitions. [2022-11-23 13:54:14,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:54:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 11039 transitions. [2022-11-23 13:54:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 13:54:14,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:14,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:14,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:14,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:14,439 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 50856514, now seen corresponding path program 1 times [2022-11-23 13:54:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888588689] [2022-11-23 13:54:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:14,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 13:54:14,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:14,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888588689] [2022-11-23 13:54:14,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888588689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:14,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547503317] [2022-11-23 13:54:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:14,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:14,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:14,568 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:14,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 13:54:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:54:14,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 13:54:14,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:14,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547503317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:14,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:54:14,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:54:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874683082] [2022-11-23 13:54:14,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:14,767 INFO L87 Difference]: Start difference. First operand 7809 states and 11039 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:16,077 INFO L93 Difference]: Finished difference Result 13984 states and 20260 transitions. [2022-11-23 13:54:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 121 [2022-11-23 13:54:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:16,107 INFO L225 Difference]: With dead ends: 13984 [2022-11-23 13:54:16,107 INFO L226 Difference]: Without dead ends: 10352 [2022-11-23 13:54:16,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:16,118 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 83 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:16,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 472 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10352 states. [2022-11-23 13:54:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10352 to 8981. [2022-11-23 13:54:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8981 states, 7338 states have (on average 1.4313164349959118) internal successors, (10503), 7384 states have internal predecessors, (10503), 957 states have call successors, (957), 667 states have call predecessors, (957), 684 states have return successors, (1401), 931 states have call predecessors, (1401), 954 states have call successors, (1401) [2022-11-23 13:54:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8981 states to 8981 states and 12861 transitions. [2022-11-23 13:54:17,289 INFO L78 Accepts]: Start accepts. Automaton has 8981 states and 12861 transitions. Word has length 121 [2022-11-23 13:54:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:17,290 INFO L495 AbstractCegarLoop]: Abstraction has 8981 states and 12861 transitions. [2022-11-23 13:54:17,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 8981 states and 12861 transitions. [2022-11-23 13:54:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 13:54:17,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:17,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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] [2022-11-23 13:54:17,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:17,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 13:54:17,500 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash -521043255, now seen corresponding path program 1 times [2022-11-23 13:54:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:17,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318390106] [2022-11-23 13:54:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:17,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 13:54:17,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:17,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318390106] [2022-11-23 13:54:17,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318390106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:17,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533566621] [2022-11-23 13:54:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:17,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:17,614 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:17,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 13:54:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:54:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 13:54:17,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:17,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533566621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:17,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:54:17,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:54:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908631774] [2022-11-23 13:54:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:17,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:17,813 INFO L87 Difference]: Start difference. First operand 8981 states and 12861 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:19,239 INFO L93 Difference]: Finished difference Result 16132 states and 23682 transitions. [2022-11-23 13:54:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 121 [2022-11-23 13:54:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:19,264 INFO L225 Difference]: With dead ends: 16132 [2022-11-23 13:54:19,264 INFO L226 Difference]: Without dead ends: 11854 [2022-11-23 13:54:19,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:54:19,275 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 77 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:19,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 478 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2022-11-23 13:54:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 10679. [2022-11-23 13:54:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10679 states, 8856 states have (on average 1.4607046070460705) internal successors, (12936), 8902 states have internal predecessors, (12936), 1047 states have call successors, (1047), 757 states have call predecessors, (1047), 774 states have return successors, (1491), 1021 states have call predecessors, (1491), 1044 states have call successors, (1491) [2022-11-23 13:54:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10679 states to 10679 states and 15474 transitions. [2022-11-23 13:54:21,034 INFO L78 Accepts]: Start accepts. Automaton has 10679 states and 15474 transitions. Word has length 121 [2022-11-23 13:54:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:21,034 INFO L495 AbstractCegarLoop]: Abstraction has 10679 states and 15474 transitions. [2022-11-23 13:54:21,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:54:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10679 states and 15474 transitions. [2022-11-23 13:54:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 13:54:21,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:21,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:21,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:21,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:21,245 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:21,245 INFO L85 PathProgramCache]: Analyzing trace with hash 504977827, now seen corresponding path program 2 times [2022-11-23 13:54:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:21,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400288359] [2022-11-23 13:54:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:21,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 13:54:21,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:21,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400288359] [2022-11-23 13:54:21,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400288359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785174757] [2022-11-23 13:54:21,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:54:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:21,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:21,449 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:21,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 13:54:21,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:54:21,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:54:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 13:54:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 13:54:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 13:54:22,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785174757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:22,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935010412] [2022-11-23 13:54:22,140 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-23 13:54:22,140 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:54:22,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:54:22,141 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:54:22,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:54:32,496 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 79 for LOIs [2022-11-23 13:54:32,501 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 144 for LOIs [2022-11-23 13:54:32,537 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-23 13:54:33,006 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-23 13:57:55,708 WARN L233 SmtUtils]: Spent 3.36m on a formula simplification that was a NOOP. DAG size: 1183 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:01:09,777 WARN L233 SmtUtils]: Spent 3.23m on a formula simplification that was a NOOP. DAG size: 1183 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:01:09,820 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 142 for LOIs [2022-11-23 14:01:09,868 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 124 for LOIs [2022-11-23 14:01:09,881 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 136 for LOIs [2022-11-23 14:01:10,263 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 134 for LOIs [2022-11-23 14:01:10,943 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 144 for LOIs [2022-11-23 14:01:10,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:02:07,909 WARN L233 SmtUtils]: Spent 41.21s on a formula simplification. DAG size of input: 1183 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:02:19,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '333609#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (<= ~t3_pc~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:02:19,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:02:19,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:02:19,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-11-23 14:02:19,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409527242] [2022-11-23 14:02:19,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:02:19,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:02:19,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:02:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:02:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2022-11-23 14:02:19,235 INFO L87 Difference]: Start difference. First operand 10679 states and 15474 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 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) [2022-11-23 14:02:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:02:23,704 INFO L93 Difference]: Finished difference Result 33417 states and 48395 transitions. [2022-11-23 14:02:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 14:02:23,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 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 121 [2022-11-23 14:02:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:02:23,754 INFO L225 Difference]: With dead ends: 33417 [2022-11-23 14:02:23,754 INFO L226 Difference]: Without dead ends: 23474 [2022-11-23 14:02:23,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 322 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=923, Invalid=6733, Unknown=0, NotChecked=0, Total=7656 [2022-11-23 14:02:23,775 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1818 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:02:23,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 1110 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:02:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23474 states. [2022-11-23 14:02:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23474 to 21112. [2022-11-23 14:02:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21112 states, 17432 states have (on average 1.4187127122533272) internal successors, (24731), 17510 states have internal predecessors, (24731), 2144 states have call successors, (2144), 1478 states have call predecessors, (2144), 1534 states have return successors, (3037), 2125 states have call predecessors, (3037), 2141 states have call successors, (3037) [2022-11-23 14:02:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21112 states to 21112 states and 29912 transitions. [2022-11-23 14:02:26,425 INFO L78 Accepts]: Start accepts. Automaton has 21112 states and 29912 transitions. Word has length 121 [2022-11-23 14:02:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:02:26,425 INFO L495 AbstractCegarLoop]: Abstraction has 21112 states and 29912 transitions. [2022-11-23 14:02:26,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 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) [2022-11-23 14:02:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21112 states and 29912 transitions. [2022-11-23 14:02:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 14:02:26,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:02:26,438 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 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] [2022-11-23 14:02:26,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:02:26,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:26,641 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:02:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:02:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash 907074545, now seen corresponding path program 1 times [2022-11-23 14:02:26,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:02:26,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19978649] [2022-11-23 14:02:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:26,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:02:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:02:26,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:02:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19978649] [2022-11-23 14:02:26,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19978649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:02:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209306697] [2022-11-23 14:02:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:26,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:02:26,827 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:02:26,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:02:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:02:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:02:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:02:27,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:02:27,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209306697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:02:27,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:02:27,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 14:02:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265274676] [2022-11-23 14:02:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:02:27,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:02:27,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:02:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:02:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:02:27,102 INFO L87 Difference]: Start difference. First operand 21112 states and 29912 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-11-23 14:02:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:02:29,836 INFO L93 Difference]: Finished difference Result 30944 states and 43599 transitions. [2022-11-23 14:02:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:02:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 126 [2022-11-23 14:02:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:02:29,877 INFO L225 Difference]: With dead ends: 30944 [2022-11-23 14:02:29,877 INFO L226 Difference]: Without dead ends: 21747 [2022-11-23 14:02:29,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:02:29,892 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 222 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:02:29,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 669 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:02:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21747 states. [2022-11-23 14:02:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21747 to 21389. [2022-11-23 14:02:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21389 states, 17664 states have (on average 1.4160439311594204) internal successors, (25013), 17758 states have internal predecessors, (25013), 2152 states have call successors, (2152), 1483 states have call predecessors, (2152), 1571 states have return successors, (3093), 2149 states have call predecessors, (3093), 2149 states have call successors, (3093) [2022-11-23 14:02:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 30258 transitions. [2022-11-23 14:02:32,709 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 30258 transitions. Word has length 126 [2022-11-23 14:02:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:02:32,710 INFO L495 AbstractCegarLoop]: Abstraction has 21389 states and 30258 transitions. [2022-11-23 14:02:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-11-23 14:02:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 30258 transitions. [2022-11-23 14:02:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 14:02:32,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:02:32,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 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] [2022-11-23 14:02:32,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:02:32,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:32,935 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:02:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:02:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash 956732298, now seen corresponding path program 1 times [2022-11-23 14:02:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:02:32,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443073731] [2022-11-23 14:02:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:32,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:02:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 14:02:33,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:02:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443073731] [2022-11-23 14:02:33,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443073731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:02:33,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145203790] [2022-11-23 14:02:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:33,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:02:33,122 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:02:33,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 14:02:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:02:33,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:02:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:02:33,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:02:33,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145203790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:02:33,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:02:33,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:02:33,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929838945] [2022-11-23 14:02:33,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:02:33,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:02:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:02:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:02:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:02:33,307 INFO L87 Difference]: Start difference. First operand 21389 states and 30258 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:02:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:02:35,973 INFO L93 Difference]: Finished difference Result 30654 states and 43380 transitions. [2022-11-23 14:02:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:02:35,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-11-23 14:02:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:02:36,011 INFO L225 Difference]: With dead ends: 30654 [2022-11-23 14:02:36,012 INFO L226 Difference]: Without dead ends: 21101 [2022-11-23 14:02:36,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:02:36,030 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 28 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:02:36,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 407 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:02:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21101 states. [2022-11-23 14:02:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21101 to 21101. [2022-11-23 14:02:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21101 states, 17408 states have (on average 1.4171070772058822) internal successors, (24669), 17494 states have internal predecessors, (24669), 2152 states have call successors, (2152), 1483 states have call predecessors, (2152), 1539 states have return successors, (3045), 2125 states have call predecessors, (3045), 2149 states have call successors, (3045) [2022-11-23 14:02:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21101 states to 21101 states and 29866 transitions. [2022-11-23 14:02:38,768 INFO L78 Accepts]: Start accepts. Automaton has 21101 states and 29866 transitions. Word has length 127 [2022-11-23 14:02:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:02:38,768 INFO L495 AbstractCegarLoop]: Abstraction has 21101 states and 29866 transitions. [2022-11-23 14:02:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:02:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21101 states and 29866 transitions. [2022-11-23 14:02:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 14:02:38,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:02:38,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 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] [2022-11-23 14:02:38,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:02:38,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:38,994 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:02:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:02:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1208385225, now seen corresponding path program 1 times [2022-11-23 14:02:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:02:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588490666] [2022-11-23 14:02:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:02:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:02:39,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:02:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588490666] [2022-11-23 14:02:39,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588490666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:02:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468539535] [2022-11-23 14:02:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:39,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:39,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:02:39,175 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:02:39,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 14:02:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:02:39,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:02:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:02:39,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:02:39,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468539535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:02:39,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:02:39,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-23 14:02:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772534757] [2022-11-23 14:02:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:02:39,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:02:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:02:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:02:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:02:39,416 INFO L87 Difference]: Start difference. First operand 21101 states and 29866 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:02:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:02:44,202 INFO L93 Difference]: Finished difference Result 49289 states and 69945 transitions. [2022-11-23 14:02:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:02:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-23 14:02:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:02:44,269 INFO L225 Difference]: With dead ends: 49289 [2022-11-23 14:02:44,269 INFO L226 Difference]: Without dead ends: 28969 [2022-11-23 14:02:44,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:02:44,304 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 463 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:02:44,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 474 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:02:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28969 states. [2022-11-23 14:02:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28969 to 28965. [2022-11-23 14:02:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28965 states, 23789 states have (on average 1.3969061330867207) internal successors, (33231), 23911 states have internal predecessors, (33231), 3028 states have call successors, (3028), 2071 states have call predecessors, (3028), 2146 states have return successors, (4307), 2984 states have call predecessors, (4307), 3025 states have call successors, (4307) [2022-11-23 14:02:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28965 states to 28965 states and 40566 transitions. [2022-11-23 14:02:48,445 INFO L78 Accepts]: Start accepts. Automaton has 28965 states and 40566 transitions. Word has length 127 [2022-11-23 14:02:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:02:48,445 INFO L495 AbstractCegarLoop]: Abstraction has 28965 states and 40566 transitions. [2022-11-23 14:02:48,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:02:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 28965 states and 40566 transitions. [2022-11-23 14:02:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-23 14:02:48,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:02:48,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 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] [2022-11-23 14:02:48,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:02:48,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-23 14:02:48,679 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:02:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:02:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash 169455045, now seen corresponding path program 1 times [2022-11-23 14:02:48,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:02:48,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899519247] [2022-11-23 14:02:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:02:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:02:49,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:02:49,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899519247] [2022-11-23 14:02:49,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899519247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:02:49,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639236622] [2022-11-23 14:02:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:49,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:02:49,082 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:02:49,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40ad004-0a32-4136-8d67-6a9611e2c61b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 14:02:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:02:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:02:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:02:49,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:02:49,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639236622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:02:49,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:02:49,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-23 14:02:49,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257041073] [2022-11-23 14:02:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:02:49,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:02:49,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:02:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:02:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:02:49,326 INFO L87 Difference]: Start difference. First operand 28965 states and 40566 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:02:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:02:56,232 INFO L93 Difference]: Finished difference Result 68148 states and 95531 transitions. [2022-11-23 14:02:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:02:56,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-23 14:02:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:02:56,323 INFO L225 Difference]: With dead ends: 68148 [2022-11-23 14:02:56,323 INFO L226 Difference]: Without dead ends: 39964 [2022-11-23 14:02:56,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:02:56,358 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 458 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:02:56,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 477 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:02:56,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39964 states.