./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:08:14,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:08:14,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:08:14,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:08:14,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:08:14,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:08:14,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:08:14,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:08:14,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:08:14,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:08:14,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:08:14,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:08:14,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:08:14,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:08:14,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:08:14,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:08:14,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:08:14,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:08:14,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:08:14,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:08:14,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:08:14,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:08:14,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:08:14,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:08:14,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:08:14,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:08:14,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:08:14,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:08:14,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:08:14,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:08:14,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:08:14,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:08:14,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:08:14,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:08:14,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:08:14,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:08:14,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:08:14,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:08:14,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:08:14,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:08:14,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:08:14,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:08:14,688 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:08:14,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:08:14,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:08:14,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:08:14,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:08:14,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:08:14,689 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:08:14,689 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:08:14,689 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:08:14,690 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:08:14,690 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:08:14,690 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:08:14,690 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:08:14,690 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:08:14,690 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:08:14,691 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:08:14,691 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:08:14,691 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:08:14,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:08:14,692 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:08:14,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:08:14,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:08:14,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:08:14,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:08:14,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:08:14,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:08:14,693 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:08:14,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:08:14,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:08:14,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:08:14,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:08:14,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:08:14,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:08:14,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:08:14,694 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:08:14,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:08:14,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:08:14,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:08:14,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:08:14,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:08:14,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:08:14,695 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_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f [2022-12-14 06:08:14,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:08:14,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:08:14,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:08:14,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:08:14,918 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:08:14,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-12-14 06:08:17,571 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:08:17,717 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:08:17,717 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-12-14 06:08:17,726 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/data/c62c36ab8/a9d23ce83dbd4af8af9681bb01d8966b/FLAG35cacb6ce [2022-12-14 06:08:17,741 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/data/c62c36ab8/a9d23ce83dbd4af8af9681bb01d8966b [2022-12-14 06:08:17,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:08:17,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:08:17,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:17,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:08:17,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:08:17,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:17" (1/1) ... [2022-12-14 06:08:17,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6148b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:17, skipping insertion in model container [2022-12-14 06:08:17,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:17" (1/1) ... [2022-12-14 06:08:17,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:08:17,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:08:17,933 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_f602c060-988d-4447-83e4-f166835a3cdc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-12-14 06:08:17,974 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_f602c060-988d-4447-83e4-f166835a3cdc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-12-14 06:08:18,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:18,058 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:08:18,069 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_f602c060-988d-4447-83e4-f166835a3cdc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-12-14 06:08:18,086 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_f602c060-988d-4447-83e4-f166835a3cdc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-12-14 06:08:18,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:18,151 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:08:18,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18 WrapperNode [2022-12-14 06:08:18,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:18,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:08:18,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:08:18,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:08:18,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,211 INFO L138 Inliner]: procedures = 73, calls = 88, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 929 [2022-12-14 06:08:18,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:08:18,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:08:18,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:08:18,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:08:18,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,254 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:08:18,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:08:18,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:08:18,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:08:18,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (1/1) ... [2022-12-14 06:08:18,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:08:18,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:18,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:08:18,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:08:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:08:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:08:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:08:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 06:08:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 06:08:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 06:08:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 06:08:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 06:08:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 06:08:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 06:08:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 06:08:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 06:08:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 06:08:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 06:08:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 06:08:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 06:08:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 06:08:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 06:08:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 06:08:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 06:08:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 06:08:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 06:08:18,331 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 06:08:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:08:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 06:08:18,331 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 06:08:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 06:08:18,331 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 06:08:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:08:18,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:08:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 06:08:18,331 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 06:08:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 06:08:18,332 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 06:08:18,440 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:08:18,441 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:08:19,062 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:08:19,423 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:08:19,424 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-12-14 06:08:19,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:08:19 BoogieIcfgContainer [2022-12-14 06:08:19,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:08:19,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:08:19,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:08:19,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:08:19,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:08:17" (1/3) ... [2022-12-14 06:08:19,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5840fb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:08:19, skipping insertion in model container [2022-12-14 06:08:19,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:18" (2/3) ... [2022-12-14 06:08:19,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5840fb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:08:19, skipping insertion in model container [2022-12-14 06:08:19,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:08:19" (3/3) ... [2022-12-14 06:08:19,435 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-12-14 06:08:19,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:08:19,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 06:08:19,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:08:19,493 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;@4e275aae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:08:19,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 06:08:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 186 states have (on average 1.543010752688172) internal successors, (287), 194 states have internal predecessors, (287), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 06:08:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 06:08:19,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:19,505 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] [2022-12-14 06:08:19,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:08:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1895701764, now seen corresponding path program 1 times [2022-12-14 06:08:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:19,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964198695] [2022-12-14 06:08:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:19,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964198695] [2022-12-14 06:08:19,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964198695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:19,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:19,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:08:19,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258685732] [2022-12-14 06:08:19,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:08:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:08:19,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:08:19,861 INFO L87 Difference]: Start difference. First operand has 244 states, 186 states have (on average 1.543010752688172) internal successors, (287), 194 states have internal predecessors, (287), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:08:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:20,230 INFO L93 Difference]: Finished difference Result 538 states and 805 transitions. [2022-12-14 06:08:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:08:20,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 06:08:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:20,239 INFO L225 Difference]: With dead ends: 538 [2022-12-14 06:08:20,239 INFO L226 Difference]: Without dead ends: 298 [2022-12-14 06:08:20,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:08:20,245 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 413 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:20,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 604 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:08:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-12-14 06:08:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2022-12-14 06:08:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 221 states have (on average 1.4479638009049773) internal successors, (320), 226 states have internal predecessors, (320), 48 states have call successors, (48), 22 states have call predecessors, (48), 20 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 06:08:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 412 transitions. [2022-12-14 06:08:20,291 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 412 transitions. Word has length 45 [2022-12-14 06:08:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:20,291 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 412 transitions. [2022-12-14 06:08:20,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:08:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 412 transitions. [2022-12-14 06:08:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 06:08:20,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:20,293 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] [2022-12-14 06:08:20,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:08:20,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:08:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:20,294 INFO L85 PathProgramCache]: Analyzing trace with hash -976727141, now seen corresponding path program 1 times [2022-12-14 06:08:20,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:20,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280506425] [2022-12-14 06:08:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:20,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:20,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280506425] [2022-12-14 06:08:20,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280506425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:20,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:20,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:08:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140978734] [2022-12-14 06:08:20,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:08:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:08:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:08:20,452 INFO L87 Difference]: Start difference. First operand 291 states and 412 transitions. 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) [2022-12-14 06:08:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:21,086 INFO L93 Difference]: Finished difference Result 472 states and 633 transitions. [2022-12-14 06:08:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:08:21,087 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 [2022-12-14 06:08:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:21,090 INFO L225 Difference]: With dead ends: 472 [2022-12-14 06:08:21,090 INFO L226 Difference]: Without dead ends: 356 [2022-12-14 06:08:21,091 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 [2022-12-14 06:08:21,091 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 504 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:21,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 897 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:08:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-12-14 06:08:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2022-12-14 06:08:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 258 states have (on average 1.4224806201550388) internal successors, (367), 263 states have internal predecessors, (367), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-14 06:08:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 475 transitions. [2022-12-14 06:08:21,113 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 475 transitions. Word has length 45 [2022-12-14 06:08:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:21,114 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 475 transitions. [2022-12-14 06:08:21,114 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) [2022-12-14 06:08:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 475 transitions. [2022-12-14 06:08:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:08:21,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:21,115 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] [2022-12-14 06:08:21,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:08:21,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:08:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:21,116 INFO L85 PathProgramCache]: Analyzing trace with hash -993674673, now seen corresponding path program 1 times [2022-12-14 06:08:21,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:21,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130925378] [2022-12-14 06:08:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:21,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:21,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:21,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130925378] [2022-12-14 06:08:21,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130925378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:21,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:21,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:08:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412000504] [2022-12-14 06:08:21,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:21,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:21,154 INFO L87 Difference]: Start difference. First operand 343 states and 475 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) [2022-12-14 06:08:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:21,265 INFO L93 Difference]: Finished difference Result 671 states and 881 transitions. [2022-12-14 06:08:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:21,266 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 [2022-12-14 06:08:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:21,269 INFO L225 Difference]: With dead ends: 671 [2022-12-14 06:08:21,269 INFO L226 Difference]: Without dead ends: 502 [2022-12-14 06:08:21,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:21,271 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 324 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:21,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 360 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:08:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-12-14 06:08:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 483. [2022-12-14 06:08:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 353 states have (on average 1.3512747875354107) internal successors, (477), 358 states have internal predecessors, (477), 80 states have call successors, (80), 50 states have call predecessors, (80), 48 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-12-14 06:08:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 633 transitions. [2022-12-14 06:08:21,311 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 633 transitions. Word has length 46 [2022-12-14 06:08:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:21,311 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 633 transitions. [2022-12-14 06:08:21,312 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) [2022-12-14 06:08:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 633 transitions. [2022-12-14 06:08:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 06:08:21,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:21,313 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] [2022-12-14 06:08:21,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:08:21,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:08:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2140462320, now seen corresponding path program 1 times [2022-12-14 06:08:21,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:21,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233233768] [2022-12-14 06:08:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:21,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:21,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233233768] [2022-12-14 06:08:21,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233233768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:21,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:21,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:08:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377605483] [2022-12-14 06:08:21,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:21,377 INFO L87 Difference]: Start difference. First operand 483 states and 633 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) [2022-12-14 06:08:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:21,504 INFO L93 Difference]: Finished difference Result 853 states and 1078 transitions. [2022-12-14 06:08:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:21,505 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 [2022-12-14 06:08:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:21,507 INFO L225 Difference]: With dead ends: 853 [2022-12-14 06:08:21,507 INFO L226 Difference]: Without dead ends: 590 [2022-12-14 06:08:21,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:21,509 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 67 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:21,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 573 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:08:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-12-14 06:08:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 584. [2022-12-14 06:08:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 424 states have (on average 1.3325471698113207) internal successors, (565), 429 states have internal predecessors, (565), 96 states have call successors, (96), 64 states have call predecessors, (96), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 06:08:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 753 transitions. [2022-12-14 06:08:21,554 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 753 transitions. Word has length 47 [2022-12-14 06:08:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:21,555 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 753 transitions. [2022-12-14 06:08:21,555 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) [2022-12-14 06:08:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 753 transitions. [2022-12-14 06:08:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 06:08:21,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:21,557 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] [2022-12-14 06:08:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:08:21,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:08:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash -442937502, now seen corresponding path program 1 times [2022-12-14 06:08:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:21,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126459185] [2022-12-14 06:08:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:21,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:21,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:21,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126459185] [2022-12-14 06:08:21,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126459185] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:21,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:21,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:08:21,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14690921] [2022-12-14 06:08:21,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:21,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:08:21,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:08:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:08:21,656 INFO L87 Difference]: Start difference. First operand 584 states and 753 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) [2022-12-14 06:08:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:21,886 INFO L93 Difference]: Finished difference Result 691 states and 879 transitions. [2022-12-14 06:08:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:08:21,886 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 [2022-12-14 06:08:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:21,889 INFO L225 Difference]: With dead ends: 691 [2022-12-14 06:08:21,889 INFO L226 Difference]: Without dead ends: 688 [2022-12-14 06:08:21,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:08:21,891 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 580 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:21,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 343 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:08:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-12-14 06:08:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 583. [2022-12-14 06:08:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 424 states have (on average 1.3254716981132075) internal successors, (562), 428 states have internal predecessors, (562), 95 states have call successors, (95), 64 states have call predecessors, (95), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 06:08:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 749 transitions. [2022-12-14 06:08:21,925 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 749 transitions. Word has length 54 [2022-12-14 06:08:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:21,926 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 749 transitions. [2022-12-14 06:08:21,926 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) [2022-12-14 06:08:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 749 transitions. [2022-12-14 06:08:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 06:08:21,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:21,927 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] [2022-12-14 06:08:21,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:08:21,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:08:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash -847475463, now seen corresponding path program 1 times [2022-12-14 06:08:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:21,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889015244] [2022-12-14 06:08:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:22,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:22,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889015244] [2022-12-14 06:08:22,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889015244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:22,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133404836] [2022-12-14 06:08:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:22,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:22,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:22,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:08:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:08:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:22,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:22,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133404836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:22,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834375009] [2022-12-14 06:08:22,502 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 06:08:22,502 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:08:22,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:08:22,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:08:22,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:08:25,559 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 185 for LOIs [2022-12-14 06:08:25,591 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 181 for LOIs [2022-12-14 06:08:25,610 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 189 for LOIs [2022-12-14 06:08:26,097 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 185 for LOIs [2022-12-14 06:08:26,191 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 185 for LOIs [2022-12-14 06:08:26,283 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 185 for LOIs [2022-12-14 06:08:26,318 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 192 for LOIs [2022-12-14 06:08:26,355 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:08:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [834375009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:40,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:08:40,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2022-12-14 06:08:40,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778788874] [2022-12-14 06:08:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 06:08:40,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 06:08:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 06:08:40,346 INFO L87 Difference]: Start difference. First operand 583 states and 749 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 06:09:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:03,469 INFO L93 Difference]: Finished difference Result 1040 states and 1282 transitions. [2022-12-14 06:09:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 06:09:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-12-14 06:09:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:03,472 INFO L225 Difference]: With dead ends: 1040 [2022-12-14 06:09:03,472 INFO L226 Difference]: Without dead ends: 632 [2022-12-14 06:09:03,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 06:09:03,474 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 149 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 4615 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:03,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 2228 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4615 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 06:09:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-12-14 06:09:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 617. [2022-12-14 06:09:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 450 states have (on average 1.3111111111111111) internal successors, (590), 454 states have internal predecessors, (590), 97 states have call successors, (97), 70 states have call predecessors, (97), 68 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 06:09:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 781 transitions. [2022-12-14 06:09:03,529 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 781 transitions. Word has length 55 [2022-12-14 06:09:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:03,529 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 781 transitions. [2022-12-14 06:09:03,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 06:09:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 781 transitions. [2022-12-14 06:09:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:09:03,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:03,530 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] [2022-12-14 06:09:03,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:09:03,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:09:03,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:03,734 INFO L85 PathProgramCache]: Analyzing trace with hash 632628639, now seen corresponding path program 1 times [2022-12-14 06:09:03,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:03,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777599703] [2022-12-14 06:09:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:03,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:03,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:03,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777599703] [2022-12-14 06:09:03,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777599703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:03,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:03,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:09:03,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776070458] [2022-12-14 06:09:03,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:03,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:09:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:09:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:09:03,803 INFO L87 Difference]: Start difference. First operand 617 states and 781 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) [2022-12-14 06:09:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:03,953 INFO L93 Difference]: Finished difference Result 1064 states and 1317 transitions. [2022-12-14 06:09:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:09:03,953 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 [2022-12-14 06:09:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:03,957 INFO L225 Difference]: With dead ends: 1064 [2022-12-14 06:09:03,957 INFO L226 Difference]: Without dead ends: 798 [2022-12-14 06:09:03,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:09:03,959 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 43 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:03,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 616 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:09:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-12-14 06:09:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 669. [2022-12-14 06:09:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 492 states have (on average 1.306910569105691) internal successors, (643), 496 states have internal predecessors, (643), 102 states have call successors, (102), 75 states have call predecessors, (102), 73 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-12-14 06:09:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 844 transitions. [2022-12-14 06:09:04,048 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 844 transitions. Word has length 61 [2022-12-14 06:09:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:04,049 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 844 transitions. [2022-12-14 06:09:04,049 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) [2022-12-14 06:09:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 844 transitions. [2022-12-14 06:09:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 06:09:04,050 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:04,050 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] [2022-12-14 06:09:04,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:09:04,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1766601886, now seen corresponding path program 1 times [2022-12-14 06:09:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:04,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941574477] [2022-12-14 06:09:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:09:04,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941574477] [2022-12-14 06:09:04,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941574477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:04,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:04,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:09:04,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383535776] [2022-12-14 06:09:04,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:04,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:09:04,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:04,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:09:04,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:09:04,172 INFO L87 Difference]: Start difference. First operand 669 states and 844 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) [2022-12-14 06:09:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:04,810 INFO L93 Difference]: Finished difference Result 1343 states and 1631 transitions. [2022-12-14 06:09:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:09:04,811 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 [2022-12-14 06:09:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:04,815 INFO L225 Difference]: With dead ends: 1343 [2022-12-14 06:09:04,815 INFO L226 Difference]: Without dead ends: 930 [2022-12-14 06:09:04,817 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 [2022-12-14 06:09:04,817 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 487 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:04,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 861 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:09:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-12-14 06:09:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 895. [2022-12-14 06:09:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 643 states have (on average 1.2690513219284603) internal successors, (816), 647 states have internal predecessors, (816), 142 states have call successors, (142), 110 states have call predecessors, (142), 108 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-12-14 06:09:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1097 transitions. [2022-12-14 06:09:04,945 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1097 transitions. Word has length 63 [2022-12-14 06:09:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:04,946 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1097 transitions. [2022-12-14 06:09:04,946 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) [2022-12-14 06:09:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1097 transitions. [2022-12-14 06:09:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 06:09:04,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:04,947 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] [2022-12-14 06:09:04,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:09:04,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1184881357, now seen corresponding path program 1 times [2022-12-14 06:09:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671772356] [2022-12-14 06:09:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:09:05,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:05,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671772356] [2022-12-14 06:09:05,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671772356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:05,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429185767] [2022-12-14 06:09:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:05,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:05,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:05,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:05,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:09:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:09:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:05,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:09:05,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429185767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768615932] [2022-12-14 06:09:05,433 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 06:09:05,433 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:09:05,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:09:05,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:09:05,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:09:18,322 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 185 for LOIs [2022-12-14 06:09:18,344 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 283 for LOIs [2022-12-14 06:09:18,436 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 277 for LOIs [2022-12-14 06:09:18,538 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 189 for LOIs [2022-12-14 06:09:18,961 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 185 for LOIs [2022-12-14 06:09:19,019 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 185 for LOIs [2022-12-14 06:09:19,075 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 185 for LOIs [2022-12-14 06:09:19,097 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 192 for LOIs [2022-12-14 06:09:19,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:09:43,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17395#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t10_i~0 0) (= ~t7_i~0 0) (= 0 ~t8_pc~0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_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) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (= ~T7_E~0 2) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 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) (= 0 ~t7_st~0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 0 ~t10_pc~0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (<= 2 ~E_10~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 2 ~T9_E~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~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) (<= ~E_7~0 2) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:09:43,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:09:43,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:09:43,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 06:09:43,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958957833] [2022-12-14 06:09:43,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:09:43,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:09:43,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:09:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:09:43,422 INFO L87 Difference]: Start difference. First operand 895 states and 1097 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) [2022-12-14 06:09:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:43,893 INFO L93 Difference]: Finished difference Result 2401 states and 2860 transitions. [2022-12-14 06:09:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:09:43,894 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 [2022-12-14 06:09:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:43,902 INFO L225 Difference]: With dead ends: 2401 [2022-12-14 06:09:43,902 INFO L226 Difference]: Without dead ends: 2398 [2022-12-14 06:09:43,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:09:43,904 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 596 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:43,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 1059 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:09:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2022-12-14 06:09:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1618. [2022-12-14 06:09:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1144 states have (on average 1.2482517482517483) internal successors, (1428), 1148 states have internal predecessors, (1428), 260 states have call successors, (260), 214 states have call predecessors, (260), 212 states have return successors, (257), 257 states have call predecessors, (257), 257 states have call successors, (257) [2022-12-14 06:09:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 1945 transitions. [2022-12-14 06:09:44,078 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 1945 transitions. Word has length 64 [2022-12-14 06:09:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:44,079 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 1945 transitions. [2022-12-14 06:09:44,079 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) [2022-12-14 06:09:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 1945 transitions. [2022-12-14 06:09:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 06:09:44,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:44,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:44,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:09:44,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:44,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:44,282 INFO L85 PathProgramCache]: Analyzing trace with hash -153655429, now seen corresponding path program 1 times [2022-12-14 06:09:44,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:44,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453718231] [2022-12-14 06:09:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:44,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:09:44,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:44,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453718231] [2022-12-14 06:09:44,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453718231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:44,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:44,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:09:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546193563] [2022-12-14 06:09:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:44,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:09:44,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:09:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:09:44,378 INFO L87 Difference]: Start difference. First operand 1618 states and 1945 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:09:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:45,136 INFO L93 Difference]: Finished difference Result 2396 states and 3226 transitions. [2022-12-14 06:09:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:09:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 62 [2022-12-14 06:09:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:45,144 INFO L225 Difference]: With dead ends: 2396 [2022-12-14 06:09:45,144 INFO L226 Difference]: Without dead ends: 2232 [2022-12-14 06:09:45,145 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 [2022-12-14 06:09:45,145 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 1273 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:45,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 1309 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:09:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-12-14 06:09:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2219. [2022-12-14 06:09:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1644 states have (on average 1.3309002433090025) internal successors, (2188), 1651 states have internal predecessors, (2188), 337 states have call successors, (337), 238 states have call predecessors, (337), 236 states have return successors, (388), 331 states have call predecessors, (388), 334 states have call successors, (388) [2022-12-14 06:09:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 2913 transitions. [2022-12-14 06:09:45,439 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 2913 transitions. Word has length 62 [2022-12-14 06:09:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:45,440 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 2913 transitions. [2022-12-14 06:09:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:09:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 2913 transitions. [2022-12-14 06:09:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 06:09:45,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:45,442 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] [2022-12-14 06:09:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:09:45,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1466832726, now seen corresponding path program 2 times [2022-12-14 06:09:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:45,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227210716] [2022-12-14 06:09:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:09:45,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227210716] [2022-12-14 06:09:45,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227210716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:45,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:45,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:09:45,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345655981] [2022-12-14 06:09:45,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:09:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:09:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:09:45,489 INFO L87 Difference]: Start difference. First operand 2219 states and 2913 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) [2022-12-14 06:09:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:45,763 INFO L93 Difference]: Finished difference Result 2975 states and 3799 transitions. [2022-12-14 06:09:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:09:45,763 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 [2022-12-14 06:09:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:45,769 INFO L225 Difference]: With dead ends: 2975 [2022-12-14 06:09:45,769 INFO L226 Difference]: Without dead ends: 1809 [2022-12-14 06:09:45,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:09:45,772 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 322 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:45,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 401 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:09:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-12-14 06:09:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1802. [2022-12-14 06:09:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1355 states have (on average 1.3431734317343174) internal successors, (1820), 1362 states have internal predecessors, (1820), 269 states have call successors, (269), 178 states have call predecessors, (269), 176 states have return successors, (320), 263 states have call predecessors, (320), 266 states have call successors, (320) [2022-12-14 06:09:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2409 transitions. [2022-12-14 06:09:45,965 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2409 transitions. Word has length 67 [2022-12-14 06:09:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:45,965 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 2409 transitions. [2022-12-14 06:09:45,965 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) [2022-12-14 06:09:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2409 transitions. [2022-12-14 06:09:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 06:09:45,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:45,966 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] [2022-12-14 06:09:45,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:09:45,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash -348170160, now seen corresponding path program 1 times [2022-12-14 06:09:45,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:45,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680250233] [2022-12-14 06:09:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:45,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:09:46,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:46,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680250233] [2022-12-14 06:09:46,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680250233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:46,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:46,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:09:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039194115] [2022-12-14 06:09:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:09:46,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:09:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:09:46,003 INFO L87 Difference]: Start difference. First operand 1802 states and 2409 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) [2022-12-14 06:09:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:46,368 INFO L93 Difference]: Finished difference Result 2774 states and 3537 transitions. [2022-12-14 06:09:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:09:46,369 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 [2022-12-14 06:09:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:46,377 INFO L225 Difference]: With dead ends: 2774 [2022-12-14 06:09:46,377 INFO L226 Difference]: Without dead ends: 1978 [2022-12-14 06:09:46,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:09:46,379 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:46,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 607 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:09:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-12-14 06:09:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1849. [2022-12-14 06:09:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1394 states have (on average 1.3414634146341464) internal successors, (1870), 1401 states have internal predecessors, (1870), 273 states have call successors, (273), 182 states have call predecessors, (273), 180 states have return successors, (324), 267 states have call predecessors, (324), 270 states have call successors, (324) [2022-12-14 06:09:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2467 transitions. [2022-12-14 06:09:46,549 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2467 transitions. Word has length 71 [2022-12-14 06:09:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:46,549 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2467 transitions. [2022-12-14 06:09:46,549 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) [2022-12-14 06:09:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2467 transitions. [2022-12-14 06:09:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 06:09:46,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:46,552 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] [2022-12-14 06:09:46,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:09:46,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1466238387, now seen corresponding path program 1 times [2022-12-14 06:09:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:46,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464829346] [2022-12-14 06:09:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:09:46,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464829346] [2022-12-14 06:09:46,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464829346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927611317] [2022-12-14 06:09:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:46,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:46,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:46,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:46,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:09:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:09:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:46,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:09:46,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927611317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:46,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:09:46,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-12-14 06:09:46,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805939314] [2022-12-14 06:09:46,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:46,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:09:46,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:09:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:09:46,916 INFO L87 Difference]: Start difference. First operand 1849 states and 2467 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) [2022-12-14 06:09:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:47,176 INFO L93 Difference]: Finished difference Result 2674 states and 3455 transitions. [2022-12-14 06:09:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:09:47,176 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 [2022-12-14 06:09:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:47,181 INFO L225 Difference]: With dead ends: 2674 [2022-12-14 06:09:47,181 INFO L226 Difference]: Without dead ends: 1878 [2022-12-14 06:09:47,183 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 [2022-12-14 06:09:47,183 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 46 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:47,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 619 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:09:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-12-14 06:09:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1845. [2022-12-14 06:09:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1390 states have (on average 1.3194244604316547) internal successors, (1834), 1397 states have internal predecessors, (1834), 273 states have call successors, (273), 182 states have call predecessors, (273), 180 states have return successors, (324), 267 states have call predecessors, (324), 270 states have call successors, (324) [2022-12-14 06:09:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2431 transitions. [2022-12-14 06:09:47,372 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2431 transitions. Word has length 102 [2022-12-14 06:09:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:47,372 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2431 transitions. [2022-12-14 06:09:47,372 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) [2022-12-14 06:09:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2431 transitions. [2022-12-14 06:09:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 06:09:47,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:47,375 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] [2022-12-14 06:09:47,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:09:47,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:09:47,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash 110319372, now seen corresponding path program 1 times [2022-12-14 06:09:47,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:47,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118604516] [2022-12-14 06:09:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 06:09:47,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118604516] [2022-12-14 06:09:47,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118604516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053188071] [2022-12-14 06:09:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:47,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:47,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:47,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:09:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:47,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 06:09:47,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:47,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:09:47,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053188071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:47,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:09:47,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 06:09:47,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604348951] [2022-12-14 06:09:47,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:47,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:09:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:09:47,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:09:47,987 INFO L87 Difference]: Start difference. First operand 1845 states and 2431 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) [2022-12-14 06:09:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:48,397 INFO L93 Difference]: Finished difference Result 2707 states and 3435 transitions. [2022-12-14 06:09:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:09:48,397 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 [2022-12-14 06:09:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:48,402 INFO L225 Difference]: With dead ends: 2707 [2022-12-14 06:09:48,402 INFO L226 Difference]: Without dead ends: 1660 [2022-12-14 06:09:48,404 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 [2022-12-14 06:09:48,404 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 315 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:48,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1255 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:09:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2022-12-14 06:09:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1475. [2022-12-14 06:09:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1152 states have (on average 1.3567708333333333) internal successors, (1563), 1159 states have internal predecessors, (1563), 202 states have call successors, (202), 121 states have call predecessors, (202), 119 states have return successors, (253), 196 states have call predecessors, (253), 199 states have call successors, (253) [2022-12-14 06:09:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2018 transitions. [2022-12-14 06:09:48,529 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2018 transitions. Word has length 102 [2022-12-14 06:09:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:48,529 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 2018 transitions. [2022-12-14 06:09:48,529 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) [2022-12-14 06:09:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2018 transitions. [2022-12-14 06:09:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 06:09:48,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:48,531 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] [2022-12-14 06:09:48,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:09:48,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:48,733 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2022028205, now seen corresponding path program 1 times [2022-12-14 06:09:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:48,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417140196] [2022-12-14 06:09:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:48,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:09:48,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417140196] [2022-12-14 06:09:48,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417140196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726458830] [2022-12-14 06:09:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:48,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:48,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:48,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:48,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:09:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:09:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:09:49,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:09:49,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726458830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:49,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:09:49,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 06:09:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368497069] [2022-12-14 06:09:49,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:49,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:09:49,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:09:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:09:49,096 INFO L87 Difference]: Start difference. First operand 1475 states and 2018 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) [2022-12-14 06:09:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:49,441 INFO L93 Difference]: Finished difference Result 2024 states and 2643 transitions. [2022-12-14 06:09:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:09:49,441 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 [2022-12-14 06:09:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:49,448 INFO L225 Difference]: With dead ends: 2024 [2022-12-14 06:09:49,448 INFO L226 Difference]: Without dead ends: 1431 [2022-12-14 06:09:49,450 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 [2022-12-14 06:09:49,451 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 63 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:49,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1576 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:09:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-12-14 06:09:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1339. [2022-12-14 06:09:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1052 states have (on average 1.3745247148288973) internal successors, (1446), 1059 states have internal predecessors, (1446), 183 states have call successors, (183), 104 states have call predecessors, (183), 102 states have return successors, (234), 177 states have call predecessors, (234), 180 states have call successors, (234) [2022-12-14 06:09:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1863 transitions. [2022-12-14 06:09:49,643 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1863 transitions. Word has length 112 [2022-12-14 06:09:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:49,643 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 1863 transitions. [2022-12-14 06:09:49,644 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) [2022-12-14 06:09:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1863 transitions. [2022-12-14 06:09:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 06:09:49,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:49,645 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] [2022-12-14 06:09:49,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:09:49,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:09:49,846 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1260632888, now seen corresponding path program 1 times [2022-12-14 06:09:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:49,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361258999] [2022-12-14 06:09:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:49,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 06:09:49,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361258999] [2022-12-14 06:09:49,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361258999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332597598] [2022-12-14 06:09:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:49,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:49,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:49,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:49,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:09:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:09:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:09:50,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:09:50,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332597598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:50,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:09:50,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 06:09:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566958258] [2022-12-14 06:09:50,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:50,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:09:50,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:09:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:09:50,150 INFO L87 Difference]: Start difference. First operand 1339 states and 1863 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) [2022-12-14 06:09:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:50,487 INFO L93 Difference]: Finished difference Result 2088 states and 2708 transitions. [2022-12-14 06:09:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:09:50,487 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 [2022-12-14 06:09:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:50,493 INFO L225 Difference]: With dead ends: 2088 [2022-12-14 06:09:50,493 INFO L226 Difference]: Without dead ends: 1631 [2022-12-14 06:09:50,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:09:50,495 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 301 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:50,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1358 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:09:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2022-12-14 06:09:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1597. [2022-12-14 06:09:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1214 states have (on average 1.3393739703459637) internal successors, (1626), 1227 states have internal predecessors, (1626), 231 states have call successors, (231), 146 states have call predecessors, (231), 150 states have return successors, (294), 225 states have call predecessors, (294), 228 states have call successors, (294) [2022-12-14 06:09:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2151 transitions. [2022-12-14 06:09:50,647 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2151 transitions. Word has length 113 [2022-12-14 06:09:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:50,647 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2151 transitions. [2022-12-14 06:09:50,647 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) [2022-12-14 06:09:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2151 transitions. [2022-12-14 06:09:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 06:09:50,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:50,648 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] [2022-12-14 06:09:50,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:09:50,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:09:50,850 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2057125716, now seen corresponding path program 1 times [2022-12-14 06:09:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:50,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084876606] [2022-12-14 06:09:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:09:51,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084876606] [2022-12-14 06:09:51,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084876606] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:51,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70825617] [2022-12-14 06:09:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:51,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:51,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:51,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:51,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:09:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:51,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 06:09:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:52,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:09:53,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70825617] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620570557] [2022-12-14 06:09:53,212 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 06:09:53,212 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:09:53,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:09:53,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:09:53,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:10:59,493 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 344 for LOIs [2022-12-14 06:11:00,087 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 296 for LOIs [2022-12-14 06:11:00,208 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 289 for LOIs [2022-12-14 06:11:00,327 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 356 for LOIs [2022-12-14 06:11:03,207 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 204 for LOIs [2022-12-14 06:11:03,589 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 153 for LOIs [2022-12-14 06:11:03,984 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 348 for LOIs [2022-12-14 06:11:04,874 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 371 for LOIs [2022-12-14 06:11:05,815 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:12:15,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68365#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t10_i~0 0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~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|) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:12:15,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:12:15,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:12:15,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 06:12:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161246765] [2022-12-14 06:12:15,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:12:15,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 06:12:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:12:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 06:12:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=10543, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 06:12:15,570 INFO L87 Difference]: Start difference. First operand 1597 states and 2151 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) [2022-12-14 06:12:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:12:32,952 INFO L93 Difference]: Finished difference Result 4108 states and 5067 transitions. [2022-12-14 06:12:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 06:12:32,952 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 [2022-12-14 06:12:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:12:32,959 INFO L225 Difference]: With dead ends: 4108 [2022-12-14 06:12:32,959 INFO L226 Difference]: Without dead ends: 3393 [2022-12-14 06:12:32,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44444 ImplicationChecksByTransitivity, 83.6s TimeCoverageRelationStatistics Valid=10086, Invalid=99144, Unknown=0, NotChecked=0, Total=109230 [2022-12-14 06:12:32,971 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 4770 mSDsluCounter, 3291 mSDsCounter, 0 mSdLazyCounter, 8644 mSolverCounterSat, 2452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4770 SdHoareTripleChecker+Valid, 3539 SdHoareTripleChecker+Invalid, 11096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2452 IncrementalHoareTripleChecker+Valid, 8644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:12:32,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4770 Valid, 3539 Invalid, 11096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2452 Valid, 8644 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 06:12:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2022-12-14 06:12:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 1873. [2022-12-14 06:12:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1398 states have (on average 1.3140200286123034) internal successors, (1837), 1413 states have internal predecessors, (1837), 276 states have call successors, (276), 183 states have call predecessors, (276), 197 states have return successors, (351), 278 states have call predecessors, (351), 273 states have call successors, (351) [2022-12-14 06:12:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2464 transitions. [2022-12-14 06:12:33,206 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2464 transitions. Word has length 114 [2022-12-14 06:12:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:12:33,206 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2464 transitions. [2022-12-14 06:12:33,207 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) [2022-12-14 06:12:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2464 transitions. [2022-12-14 06:12:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 06:12:33,208 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:12:33,208 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] [2022-12-14 06:12:33,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 06:12:33,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 06:12:33,409 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:12:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:12:33,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2017349563, now seen corresponding path program 1 times [2022-12-14 06:12:33,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:12:33,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353813106] [2022-12-14 06:12:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:12:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:12:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:12:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:12:33,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:12:33,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353813106] [2022-12-14 06:12:33,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353813106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:12:33,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145792204] [2022-12-14 06:12:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:12:33,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:12:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:12:33,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:12:33,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:12:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:12:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 06:12:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:12:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:12:33,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:12:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:12:33,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145792204] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:12:33,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:12:33,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 06:12:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734782450] [2022-12-14 06:12:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:12:33,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:12:33,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:12:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:12:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:12:33,833 INFO L87 Difference]: Start difference. First operand 1873 states and 2464 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) [2022-12-14 06:12:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:12:34,577 INFO L93 Difference]: Finished difference Result 3197 states and 4012 transitions. [2022-12-14 06:12:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:12:34,578 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 [2022-12-14 06:12:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:12:34,585 INFO L225 Difference]: With dead ends: 3197 [2022-12-14 06:12:34,585 INFO L226 Difference]: Without dead ends: 2206 [2022-12-14 06:12:34,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 06:12:34,586 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 483 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:12:34,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 573 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:12:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2022-12-14 06:12:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 1953. [2022-12-14 06:12:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1443 states have (on average 1.3083853083853083) internal successors, (1888), 1461 states have internal predecessors, (1888), 295 states have call successors, (295), 192 states have call predecessors, (295), 213 states have return successors, (391), 301 states have call predecessors, (391), 292 states have call successors, (391) [2022-12-14 06:12:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2574 transitions. [2022-12-14 06:12:34,830 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2574 transitions. Word has length 115 [2022-12-14 06:12:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:12:34,830 INFO L495 AbstractCegarLoop]: Abstraction has 1953 states and 2574 transitions. [2022-12-14 06:12:34,830 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) [2022-12-14 06:12:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2574 transitions. [2022-12-14 06:12:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 06:12:34,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:12:34,832 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] [2022-12-14 06:12:34,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 06:12:35,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:12:35,034 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:12:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:12:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash -999627647, now seen corresponding path program 1 times [2022-12-14 06:12:35,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:12:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480820924] [2022-12-14 06:12:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:12:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:12:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:12:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 06:12:35,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:12:35,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480820924] [2022-12-14 06:12:35,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480820924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:12:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516531016] [2022-12-14 06:12:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:12:35,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:12:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:12:35,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:12:35,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:12:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:12:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 06:12:35,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:12:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:12:36,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:12:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 06:12:37,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516531016] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:12:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36291966] [2022-12-14 06:12:37,536 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 06:12:37,537 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:12:37,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:12:37,537 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:12:37,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:13:05,820 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 279 for LOIs [2022-12-14 06:13:05,921 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 282 for LOIs [2022-12-14 06:13:06,013 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 140 for LOIs [2022-12-14 06:13:06,027 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 279 for LOIs [2022-12-14 06:13:07,016 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 279 for LOIs [2022-12-14 06:13:07,565 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 140 for LOIs [2022-12-14 06:13:07,893 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 279 for LOIs [2022-12-14 06:13:07,994 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 289 for LOIs [2022-12-14 06:13:08,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:03,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '86574#(and (= ~q_req_up~0 1) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0))' at error location [2022-12-14 06:14:03,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:03,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:03,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 06:14:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62571519] [2022-12-14 06:14:03,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:03,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 06:14:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 06:14:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=10252, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 06:14:03,651 INFO L87 Difference]: Start difference. First operand 1953 states and 2574 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) [2022-12-14 06:14:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:13,528 INFO L93 Difference]: Finished difference Result 4237 states and 5276 transitions. [2022-12-14 06:14:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 06:14:13,529 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 [2022-12-14 06:14:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:13,536 INFO L225 Difference]: With dead ends: 4237 [2022-12-14 06:14:13,536 INFO L226 Difference]: Without dead ends: 3166 [2022-12-14 06:14:13,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 301 SyntacticMatches, 28 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28561 ImplicationChecksByTransitivity, 61.9s TimeCoverageRelationStatistics Valid=6676, Invalid=59116, Unknown=0, NotChecked=0, Total=65792 [2022-12-14 06:14:13,543 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 5257 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 8240 mSolverCounterSat, 3474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5257 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 11714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3474 IncrementalHoareTripleChecker+Valid, 8240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:13,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5257 Valid, 3512 Invalid, 11714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3474 Valid, 8240 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 06:14:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-12-14 06:14:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 1769. [2022-12-14 06:14:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1331 states have (on average 1.322314049586777) internal successors, (1760), 1348 states have internal predecessors, (1760), 255 states have call successors, (255), 160 states have call predecessors, (255), 181 states have return successors, (341), 262 states have call predecessors, (341), 252 states have call successors, (341) [2022-12-14 06:14:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2356 transitions. [2022-12-14 06:14:13,813 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2356 transitions. Word has length 124 [2022-12-14 06:14:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:13,813 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 2356 transitions. [2022-12-14 06:14:13,813 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) [2022-12-14 06:14:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2356 transitions. [2022-12-14 06:14:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:14:13,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:13,815 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] [2022-12-14 06:14:13,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:14:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:14,016 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1865912948, now seen corresponding path program 1 times [2022-12-14 06:14:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:14,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230691066] [2022-12-14 06:14:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 06:14:14,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:14,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230691066] [2022-12-14 06:14:14,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230691066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:14,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579865766] [2022-12-14 06:14:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:14,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:14,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:14,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:14:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:14:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 06:14:14,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:14:14,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579865766] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:14,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:14:14,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 06:14:14,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122804421] [2022-12-14 06:14:14,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:14:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:14:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:14:14,439 INFO L87 Difference]: Start difference. First operand 1769 states and 2356 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) [2022-12-14 06:14:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:15,369 INFO L93 Difference]: Finished difference Result 2424 states and 3097 transitions. [2022-12-14 06:14:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:14:15,370 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 [2022-12-14 06:14:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:15,374 INFO L225 Difference]: With dead ends: 2424 [2022-12-14 06:14:15,374 INFO L226 Difference]: Without dead ends: 1537 [2022-12-14 06:14:15,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:14:15,376 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 726 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:15,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 542 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:14:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-12-14 06:14:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1500. [2022-12-14 06:14:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1132 states have (on average 1.338339222614841) internal successors, (1515), 1149 states have internal predecessors, (1515), 219 states have call successors, (219), 130 states have call predecessors, (219), 147 states have return successors, (300), 222 states have call predecessors, (300), 216 states have call successors, (300) [2022-12-14 06:14:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2034 transitions. [2022-12-14 06:14:15,603 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2034 transitions. Word has length 125 [2022-12-14 06:14:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:15,603 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 2034 transitions. [2022-12-14 06:14:15,603 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) [2022-12-14 06:14:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2034 transitions. [2022-12-14 06:14:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:14:15,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:15,605 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, 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] [2022-12-14 06:14:15,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:14:15,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:15,806 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1299403483, now seen corresponding path program 1 times [2022-12-14 06:14:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099100106] [2022-12-14 06:14:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:14:15,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:15,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099100106] [2022-12-14 06:14:15,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099100106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:15,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727593173] [2022-12-14 06:14:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:15,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:15,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:14:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:14:16,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:14:16,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:14:16,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727593173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:16,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:14:16,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:14:16,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726753807] [2022-12-14 06:14:16,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:16,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:14:16,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:14:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:16,100 INFO L87 Difference]: Start difference. First operand 1500 states and 2034 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:16,491 INFO L93 Difference]: Finished difference Result 3014 states and 4552 transitions. [2022-12-14 06:14:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:14:16,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 123 [2022-12-14 06:14:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:16,496 INFO L225 Difference]: With dead ends: 3014 [2022-12-14 06:14:16,497 INFO L226 Difference]: Without dead ends: 2249 [2022-12-14 06:14:16,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:16,499 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 317 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:16,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2022-12-14 06:14:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2240. [2022-12-14 06:14:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1750 states have (on average 1.4) internal successors, (2450), 1770 states have internal predecessors, (2450), 311 states have call successors, (311), 160 states have call predecessors, (311), 177 states have return successors, (442), 311 states have call predecessors, (442), 308 states have call successors, (442) [2022-12-14 06:14:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3203 transitions. [2022-12-14 06:14:16,793 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3203 transitions. Word has length 123 [2022-12-14 06:14:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:16,793 INFO L495 AbstractCegarLoop]: Abstraction has 2240 states and 3203 transitions. [2022-12-14 06:14:16,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3203 transitions. [2022-12-14 06:14:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:14:16,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:16,795 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, 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] [2022-12-14 06:14:16,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:16,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 06:14:16,995 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 314408645, now seen corresponding path program 1 times [2022-12-14 06:14:16,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:16,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724148992] [2022-12-14 06:14:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:16,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:14:17,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:17,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724148992] [2022-12-14 06:14:17,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724148992] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:17,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114841253] [2022-12-14 06:14:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:17,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:17,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:17,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:17,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:14:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:14:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:14:17,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:14:17,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114841253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:17,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:14:17,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:14:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317667970] [2022-12-14 06:14:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:17,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:14:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:14:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:17,254 INFO L87 Difference]: Start difference. First operand 2240 states and 3203 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:17,781 INFO L93 Difference]: Finished difference Result 5219 states and 8133 transitions. [2022-12-14 06:14:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:14:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 123 [2022-12-14 06:14:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:17,790 INFO L225 Difference]: With dead ends: 5219 [2022-12-14 06:14:17,790 INFO L226 Difference]: Without dead ends: 3714 [2022-12-14 06:14:17,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:17,794 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 314 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:17,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2022-12-14 06:14:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3700. [2022-12-14 06:14:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 2971 states have (on average 1.4439582632110401) internal successors, (4290), 2997 states have internal predecessors, (4290), 490 states have call successors, (490), 220 states have call predecessors, (490), 237 states have return successors, (717), 484 states have call predecessors, (717), 487 states have call successors, (717) [2022-12-14 06:14:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5497 transitions. [2022-12-14 06:14:18,225 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5497 transitions. Word has length 123 [2022-12-14 06:14:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:18,225 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5497 transitions. [2022-12-14 06:14:18,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5497 transitions. [2022-12-14 06:14:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:14:18,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:18,228 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, 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] [2022-12-14 06:14:18,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:18,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:18,429 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 779555109, now seen corresponding path program 1 times [2022-12-14 06:14:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:18,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966352862] [2022-12-14 06:14:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:18,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:14:18,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966352862] [2022-12-14 06:14:18,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966352862] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380578634] [2022-12-14 06:14:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:18,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:18,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:18,492 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:18,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:14:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:18,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:14:18,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:14:18,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:14:18,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380578634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:18,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:14:18,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:14:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112298406] [2022-12-14 06:14:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:18,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:14:18,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:14:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:18,665 INFO L87 Difference]: Start difference. First operand 3700 states and 5497 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:19,611 INFO L93 Difference]: Finished difference Result 9569 states and 15154 transitions. [2022-12-14 06:14:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:14:19,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 123 [2022-12-14 06:14:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:19,625 INFO L225 Difference]: With dead ends: 9569 [2022-12-14 06:14:19,625 INFO L226 Difference]: Without dead ends: 6604 [2022-12-14 06:14:19,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:19,632 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 296 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:19,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2022-12-14 06:14:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 6580. [2022-12-14 06:14:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 5383 states have (on average 1.4694408322496748) internal successors, (7910), 5421 states have internal predecessors, (7910), 838 states have call successors, (838), 340 states have call predecessors, (838), 357 states have return successors, (1249), 820 states have call predecessors, (1249), 835 states have call successors, (1249) [2022-12-14 06:14:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 9997 transitions. [2022-12-14 06:14:20,335 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 9997 transitions. Word has length 123 [2022-12-14 06:14:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:20,335 INFO L495 AbstractCegarLoop]: Abstraction has 6580 states and 9997 transitions. [2022-12-14 06:14:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 9997 transitions. [2022-12-14 06:14:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:14:20,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:20,340 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, 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] [2022-12-14 06:14:20,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:20,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:20,540 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:20,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1318222725, now seen corresponding path program 1 times [2022-12-14 06:14:20,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:20,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470789139] [2022-12-14 06:14:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:20,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:14:20,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470789139] [2022-12-14 06:14:20,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470789139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753706010] [2022-12-14 06:14:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:20,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:20,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:20,602 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:20,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:14:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:14:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:14:20,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:14:20,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753706010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:20,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:14:20,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:14:20,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607041596] [2022-12-14 06:14:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:20,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:14:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:14:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:20,741 INFO L87 Difference]: Start difference. First operand 6580 states and 9997 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:22,267 INFO L93 Difference]: Finished difference Result 18149 states and 28914 transitions. [2022-12-14 06:14:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:14:22,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 123 [2022-12-14 06:14:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:22,298 INFO L225 Difference]: With dead ends: 18149 [2022-12-14 06:14:22,298 INFO L226 Difference]: Without dead ends: 12304 [2022-12-14 06:14:22,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:22,313 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 302 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:22,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12304 states. [2022-12-14 06:14:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12304 to 12260. [2022-12-14 06:14:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12260 states, 10147 states have (on average 1.4812259781216124) internal successors, (15030), 10209 states have internal predecessors, (15030), 1514 states have call successors, (1514), 580 states have call predecessors, (1514), 597 states have return successors, (2277), 1472 states have call predecessors, (2277), 1511 states have call successors, (2277) [2022-12-14 06:14:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12260 states to 12260 states and 18821 transitions. [2022-12-14 06:14:23,678 INFO L78 Accepts]: Start accepts. Automaton has 12260 states and 18821 transitions. Word has length 123 [2022-12-14 06:14:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:23,679 INFO L495 AbstractCegarLoop]: Abstraction has 12260 states and 18821 transitions. [2022-12-14 06:14:23,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 12260 states and 18821 transitions. [2022-12-14 06:14:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:14:23,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:23,687 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, 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] [2022-12-14 06:14:23,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:23,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 06:14:23,888 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash -649290267, now seen corresponding path program 1 times [2022-12-14 06:14:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:23,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789874537] [2022-12-14 06:14:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:14:23,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789874537] [2022-12-14 06:14:23,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789874537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822751372] [2022-12-14 06:14:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:23,981 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:23,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:14:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:14:24,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:14:24,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:14:24,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822751372] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:24,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:14:24,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:14:24,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696722121] [2022-12-14 06:14:24,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:24,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:14:24,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:24,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:14:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:24,170 INFO L87 Difference]: Start difference. First operand 12260 states and 18821 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:26,765 INFO L93 Difference]: Finished difference Result 35069 states and 55870 transitions. [2022-12-14 06:14:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:14:26,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 123 [2022-12-14 06:14:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:26,821 INFO L225 Difference]: With dead ends: 35069 [2022-12-14 06:14:26,821 INFO L226 Difference]: Without dead ends: 23544 [2022-12-14 06:14:26,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:26,852 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 308 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:26,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23544 states. [2022-12-14 06:14:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23544 to 23460. [2022-12-14 06:14:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23460 states, 19555 states have (on average 1.4845308105343902) internal successors, (29030), 19665 states have internal predecessors, (29030), 2826 states have call successors, (2826), 1060 states have call predecessors, (2826), 1077 states have return successors, (4261), 2736 states have call predecessors, (4261), 2823 states have call successors, (4261) [2022-12-14 06:14:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23460 states to 23460 states and 36117 transitions. [2022-12-14 06:14:29,530 INFO L78 Accepts]: Start accepts. Automaton has 23460 states and 36117 transitions. Word has length 123 [2022-12-14 06:14:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:29,531 INFO L495 AbstractCegarLoop]: Abstraction has 23460 states and 36117 transitions. [2022-12-14 06:14:29,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:14:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 23460 states and 36117 transitions. [2022-12-14 06:14:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:14:29,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:29,547 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, 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] [2022-12-14 06:14:29,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 06:14:29,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f602c060-988d-4447-83e4-f166835a3cdc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 06:14:29,749 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1522235461, now seen corresponding path program 1 times [2022-12-14 06:14:29,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:29,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244987501] [2022-12-14 06:14:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:14:29,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:29,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244987501] [2022-12-14 06:14:29,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244987501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:29,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:29,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:14:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23263079] [2022-12-14 06:14:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:14:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:14:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:29,995 INFO L87 Difference]: Start difference. First operand 23460 states and 36117 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:14:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:34,730 INFO L93 Difference]: Finished difference Result 60108 states and 94235 transitions. [2022-12-14 06:14:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:14:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-12-14 06:14:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:34,836 INFO L225 Difference]: With dead ends: 60108 [2022-12-14 06:14:34,836 INFO L226 Difference]: Without dead ends: 37384 [2022-12-14 06:14:34,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:14:34,884 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 869 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:34,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 762 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:14:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37384 states. [2022-12-14 06:14:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37384 to 34500. [2022-12-14 06:14:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34500 states, 28803 states have (on average 1.4828316494809568) internal successors, (42710), 28961 states have internal predecessors, (42710), 4138 states have call successors, (4138), 1540 states have call predecessors, (4138), 1557 states have return successors, (6245), 4000 states have call predecessors, (6245), 4135 states have call successors, (6245) [2022-12-14 06:14:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34500 states to 34500 states and 53093 transitions. [2022-12-14 06:14:38,633 INFO L78 Accepts]: Start accepts. Automaton has 34500 states and 53093 transitions. Word has length 123 [2022-12-14 06:14:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:38,633 INFO L495 AbstractCegarLoop]: Abstraction has 34500 states and 53093 transitions. [2022-12-14 06:14:38,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:14:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34500 states and 53093 transitions. [2022-12-14 06:14:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 06:14:38,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:38,657 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, 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] [2022-12-14 06:14:38,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 06:14:38,657 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash 35781384, now seen corresponding path program 1 times [2022-12-14 06:14:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:38,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369160421] [2022-12-14 06:14:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:14:38,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369160421] [2022-12-14 06:14:38,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369160421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:38,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:38,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:14:38,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413075288] [2022-12-14 06:14:38,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:38,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:14:38,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:14:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:38,867 INFO L87 Difference]: Start difference. First operand 34500 states and 53093 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:14:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:45,177 INFO L93 Difference]: Finished difference Result 85388 states and 134183 transitions. [2022-12-14 06:14:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:14:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-12-14 06:14:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:45,320 INFO L225 Difference]: With dead ends: 85388 [2022-12-14 06:14:45,320 INFO L226 Difference]: Without dead ends: 51624 [2022-12-14 06:14:45,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:14:45,385 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 781 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:45,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 718 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:14:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51624 states. [2022-12-14 06:14:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51624 to 50900. [2022-12-14 06:14:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50900 states, 42535 states have (on average 1.479957681909016) internal successors, (62950), 42765 states have internal predecessors, (62950), 6086 states have call successors, (6086), 2260 states have call predecessors, (6086), 2277 states have return successors, (9185), 5876 states have call predecessors, (9185), 6083 states have call successors, (9185) [2022-12-14 06:14:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50900 states to 50900 states and 78221 transitions. [2022-12-14 06:14:51,270 INFO L78 Accepts]: Start accepts. Automaton has 50900 states and 78221 transitions. Word has length 124 [2022-12-14 06:14:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:51,271 INFO L495 AbstractCegarLoop]: Abstraction has 50900 states and 78221 transitions. [2022-12-14 06:14:51,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:14:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 50900 states and 78221 transitions. [2022-12-14 06:14:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:14:51,299 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:51,299 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, 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] [2022-12-14 06:14:51,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 06:14:51,299 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1545351589, now seen corresponding path program 1 times [2022-12-14 06:14:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:51,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106785070] [2022-12-14 06:14:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:14:51,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106785070] [2022-12-14 06:14:51,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106785070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:51,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:51,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:14:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660604453] [2022-12-14 06:14:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:51,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:14:51,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:14:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:14:51,497 INFO L87 Difference]: Start difference. First operand 50900 states and 78221 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:15:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:02,136 INFO L93 Difference]: Finished difference Result 140908 states and 219287 transitions. [2022-12-14 06:15:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:15:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-12-14 06:15:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:02,391 INFO L225 Difference]: With dead ends: 140908 [2022-12-14 06:15:02,391 INFO L226 Difference]: Without dead ends: 90744 [2022-12-14 06:15:02,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:15:02,487 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 901 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:02,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1059 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:15:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90744 states. [2022-12-14 06:15:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90744 to 80132. [2022-12-14 06:15:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80132 states, 66979 states have (on average 1.4741038235864972) internal successors, (98734), 67353 states have internal predecessors, (98734), 9578 states have call successors, (9578), 3556 states have call predecessors, (9578), 3573 states have return successors, (14873), 9224 states have call predecessors, (14873), 9575 states have call successors, (14873) [2022-12-14 06:15:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80132 states to 80132 states and 123185 transitions. [2022-12-14 06:15:11,966 INFO L78 Accepts]: Start accepts. Automaton has 80132 states and 123185 transitions. Word has length 125 [2022-12-14 06:15:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:11,967 INFO L495 AbstractCegarLoop]: Abstraction has 80132 states and 123185 transitions. [2022-12-14 06:15:11,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:15:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 80132 states and 123185 transitions. [2022-12-14 06:15:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 06:15:12,018 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:12,018 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, 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] [2022-12-14 06:15:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 06:15:12,018 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash 794405284, now seen corresponding path program 1 times [2022-12-14 06:15:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796992158] [2022-12-14 06:15:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:15:12,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:12,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796992158] [2022-12-14 06:15:12,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796992158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:15:12,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:15:12,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:15:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303764205] [2022-12-14 06:15:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:15:12,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:15:12,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:12,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:15:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:15:12,251 INFO L87 Difference]: Start difference. First operand 80132 states and 123185 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:15:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:29,225 INFO L93 Difference]: Finished difference Result 214972 states and 334583 transitions. [2022-12-14 06:15:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:15:29,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-12-14 06:15:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:29,646 INFO L225 Difference]: With dead ends: 214972 [2022-12-14 06:15:29,646 INFO L226 Difference]: Without dead ends: 135576 [2022-12-14 06:15:29,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:15:29,801 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 893 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:29,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 974 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:15:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135576 states. [2022-12-14 06:15:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135576 to 118676. [2022-12-14 06:15:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118676 states, 99211 states have (on average 1.4696959006561772) internal successors, (145810), 99765 states have internal predecessors, (145810), 14162 states have call successors, (14162), 5284 states have call predecessors, (14162), 5301 states have return successors, (21965), 13628 states have call predecessors, (21965), 14159 states have call successors, (21965) [2022-12-14 06:15:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118676 states to 118676 states and 181937 transitions. [2022-12-14 06:15:44,806 INFO L78 Accepts]: Start accepts. Automaton has 118676 states and 181937 transitions. Word has length 126 [2022-12-14 06:15:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:44,807 INFO L495 AbstractCegarLoop]: Abstraction has 118676 states and 181937 transitions. [2022-12-14 06:15:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:15:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 118676 states and 181937 transitions. [2022-12-14 06:15:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 06:15:44,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:44,865 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, 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] [2022-12-14 06:15:44,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 06:15:44,865 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1476165893, now seen corresponding path program 1 times [2022-12-14 06:15:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754644670] [2022-12-14 06:15:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:44,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:15:45,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:45,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754644670] [2022-12-14 06:15:45,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754644670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:15:45,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:15:45,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:15:45,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134399859] [2022-12-14 06:15:45,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:15:45,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:15:45,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:15:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:15:45,068 INFO L87 Difference]: Start difference. First operand 118676 states and 181937 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:16:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:10,685 INFO L93 Difference]: Finished difference Result 316180 states and 491363 transitions. [2022-12-14 06:16:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:16:10,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2022-12-14 06:16:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:11,362 INFO L225 Difference]: With dead ends: 316180 [2022-12-14 06:16:11,362 INFO L226 Difference]: Without dead ends: 198240 [2022-12-14 06:16:11,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:16:11,618 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 876 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:11,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 959 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:16:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198240 states. [2022-12-14 06:16:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198240 to 175916. [2022-12-14 06:16:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175916 states, 147055 states have (on average 1.46486688653905) internal successors, (215416), 147879 states have internal predecessors, (215416), 20966 states have call successors, (20966), 7876 states have call predecessors, (20966), 7893 states have return successors, (32468), 20162 states have call predecessors, (32468), 20963 states have call successors, (32468) [2022-12-14 06:16:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175916 states to 175916 states and 268850 transitions. [2022-12-14 06:16:35,717 INFO L78 Accepts]: Start accepts. Automaton has 175916 states and 268850 transitions. Word has length 127 [2022-12-14 06:16:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:35,718 INFO L495 AbstractCegarLoop]: Abstraction has 175916 states and 268850 transitions. [2022-12-14 06:16:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:16:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 175916 states and 268850 transitions. [2022-12-14 06:16:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 06:16:35,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:35,809 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, 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] [2022-12-14 06:16:35,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 06:16:35,809 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:16:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash 532270024, now seen corresponding path program 1 times [2022-12-14 06:16:35,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:16:35,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888660263] [2022-12-14 06:16:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:16:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:16:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:16:36,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:16:36,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888660263] [2022-12-14 06:16:36,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888660263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:16:36,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:16:36,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:16:36,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219996879] [2022-12-14 06:16:36,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:16:36,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:16:36,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:16:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:16:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:16:36,034 INFO L87 Difference]: Start difference. First operand 175916 states and 268850 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:17:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:17:27,289 INFO L93 Difference]: Finished difference Result 555220 states and 866718 transitions. [2022-12-14 06:17:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:17:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-12-14 06:17:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:17:28,937 INFO L225 Difference]: With dead ends: 555220 [2022-12-14 06:17:28,938 INFO L226 Difference]: Without dead ends: 380040 [2022-12-14 06:17:29,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:17:29,543 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 864 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:17:29,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 835 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:17:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380040 states. [2022-12-14 06:18:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380040 to 343316. [2022-12-14 06:18:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343316 states, 287131 states have (on average 1.457933835078762) internal successors, (418618), 288765 states have internal predecessors, (418618), 40514 states have call successors, (40514), 15652 states have call predecessors, (40514), 15669 states have return successors, (62357), 38900 states have call predecessors, (62357), 40511 states have call successors, (62357) [2022-12-14 06:18:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343316 states to 343316 states and 521489 transitions. [2022-12-14 06:18:19,275 INFO L78 Accepts]: Start accepts. Automaton has 343316 states and 521489 transitions. Word has length 128 [2022-12-14 06:18:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:19,276 INFO L495 AbstractCegarLoop]: Abstraction has 343316 states and 521489 transitions. [2022-12-14 06:18:19,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:18:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 343316 states and 521489 transitions. [2022-12-14 06:18:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 06:18:19,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:19,493 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, 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] [2022-12-14 06:18:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 06:18:19,493 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash 670798313, now seen corresponding path program 1 times [2022-12-14 06:18:19,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:19,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917692351] [2022-12-14 06:18:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:18:19,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:19,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917692351] [2022-12-14 06:18:19,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917692351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:19,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:19,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:18:19,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689175199] [2022-12-14 06:18:19,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:19,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:18:19,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:19,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:18:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:18:19,785 INFO L87 Difference]: Start difference. First operand 343316 states and 521489 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:19:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:40,916 INFO L93 Difference]: Finished difference Result 879652 states and 1358387 transitions. [2022-12-14 06:19:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:19:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-12-14 06:19:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:43,154 INFO L225 Difference]: With dead ends: 879652 [2022-12-14 06:19:43,154 INFO L226 Difference]: Without dead ends: 537072 [2022-12-14 06:19:44,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:19:44,070 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 809 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:44,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 899 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:19:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537072 states.