./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.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_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/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_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/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_4e9f49ea-2e20-4262-8b7f-131a138b5634/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 dc8dc9bdb034e5a733c81076f9e42c36caa1eb5cb68a77287d3420bd964c5f5a --- 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 13:02:11,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:02:11,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:02:11,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:02:11,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:02:11,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:02:11,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:02:11,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:02:11,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:02:11,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:02:11,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:02:11,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:02:11,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:02:11,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:02:11,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:02:11,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:02:11,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:02:11,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:02:11,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:02:11,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:02:11,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:02:11,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:02:11,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:02:11,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:02:11,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:02:11,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:02:11,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:02:11,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:02:11,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:02:11,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:02:11,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:02:11,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:02:11,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:02:11,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:02:11,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:02:11,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:02:11,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:02:11,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:02:11,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:02:11,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:02:11,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:02:11,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:02:11,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:02:11,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:02:11,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:02:11,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:02:11,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:02:11,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:02:11,137 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:02:11,137 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:02:11,137 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:02:11,138 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:02:11,138 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:02:11,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:02:11,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:02:11,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:02:11,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:02:11,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:02:11,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:02:11,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:02:11,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:02:11,140 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:02:11,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:02:11,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:02:11,140 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:02:11,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:02:11,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:02:11,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:02:11,140 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_4e9f49ea-2e20-4262-8b7f-131a138b5634/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc8dc9bdb034e5a733c81076f9e42c36caa1eb5cb68a77287d3420bd964c5f5a [2022-12-14 13:02:11,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:02:11,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:02:11,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:02:11,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:02:11,321 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:02:11,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c [2022-12-14 13:02:13,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:02:14,126 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:02:14,127 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c [2022-12-14 13:02:14,139 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/data/a554d7c18/43894ec57a504fbfa895468583fc75b3/FLAG55e115f09 [2022-12-14 13:02:14,150 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/data/a554d7c18/43894ec57a504fbfa895468583fc75b3 [2022-12-14 13:02:14,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:02:14,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:02:14,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:02:14,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:02:14,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:02:14,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d6b1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14, skipping insertion in model container [2022-12-14 13:02:14,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:02:14,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:02:14,307 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_4e9f49ea-2e20-4262-8b7f-131a138b5634/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[914,927] [2022-12-14 13:02:14,346 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_4e9f49ea-2e20-4262-8b7f-131a138b5634/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[7115,7128] [2022-12-14 13:02:14,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:02:14,430 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:02:14,439 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_4e9f49ea-2e20-4262-8b7f-131a138b5634/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[914,927] [2022-12-14 13:02:14,450 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_4e9f49ea-2e20-4262-8b7f-131a138b5634/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[7115,7128] [2022-12-14 13:02:14,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:02:14,504 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:02:14,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14 WrapperNode [2022-12-14 13:02:14,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:02:14,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:02:14,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:02:14,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:02:14,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,556 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1101 [2022-12-14 13:02:14,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:02:14,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:02:14,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:02:14,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:02:14,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,588 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:02:14,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:02:14,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:02:14,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:02:14,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (1/1) ... [2022-12-14 13:02:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:02:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:14,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:02:14,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:02:14,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:02:14,657 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:02:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:02:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 13:02:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 13:02:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 13:02:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 13:02:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 13:02:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 13:02:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 13:02:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 13:02:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 13:02:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 13:02:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 13:02:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 13:02:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 13:02:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 13:02:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 13:02:14,660 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 13:02:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 13:02:14,660 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 13:02:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 13:02:14,660 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 13:02:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:02:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 13:02:14,660 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 13:02:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 13:02:14,661 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 13:02:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:02:14,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:02:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 13:02:14,661 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 13:02:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 13:02:14,661 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 13:02:14,769 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:02:14,771 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:02:15,425 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:02:15,809 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:02:15,809 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-12-14 13:02:15,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:02:15 BoogieIcfgContainer [2022-12-14 13:02:15,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:02:15,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:02:15,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:02:15,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:02:15,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:02:14" (1/3) ... [2022-12-14 13:02:15,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f165f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:02:15, skipping insertion in model container [2022-12-14 13:02:15,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:14" (2/3) ... [2022-12-14 13:02:15,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f165f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:02:15, skipping insertion in model container [2022-12-14 13:02:15,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:02:15" (3/3) ... [2022-12-14 13:02:15,818 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.15.cil.c [2022-12-14 13:02:15,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:02:15,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 13:02:15,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:02:15,876 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;@dc14090, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:02:15,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 13:02:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-12-14 13:02:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 13:02:15,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:15,887 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 13:02:15,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2085638066, now seen corresponding path program 1 times [2022-12-14 13:02:15,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:15,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799328159] [2022-12-14 13:02:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:15,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:16,104 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 13:02:16,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:16,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799328159] [2022-12-14 13:02:16,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799328159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:16,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:16,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:02:16,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784145432] [2022-12-14 13:02:16,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:16,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:02:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:02:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:02:16,132 INFO L87 Difference]: Start difference. First operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) 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 13:02:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:16,470 INFO L93 Difference]: Finished difference Result 604 states and 913 transitions. [2022-12-14 13:02:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:02:16,472 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 13:02:16,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:16,483 INFO L225 Difference]: With dead ends: 604 [2022-12-14 13:02:16,483 INFO L226 Difference]: Without dead ends: 331 [2022-12-14 13:02:16,488 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 13:02:16,491 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 467 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:16,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 690 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:02:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-12-14 13:02:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2022-12-14 13:02:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 251 states have (on average 1.4661354581673307) internal successors, (368), 256 states have internal predecessors, (368), 51 states have call successors, (51), 22 states have call predecessors, (51), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-12-14 13:02:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 466 transitions. [2022-12-14 13:02:16,553 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 466 transitions. Word has length 45 [2022-12-14 13:02:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:16,554 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 466 transitions. [2022-12-14 13:02:16,554 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 13:02:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 466 transitions. [2022-12-14 13:02:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 13:02:16,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:16,556 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 13:02:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:02:16,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1166663443, now seen corresponding path program 1 times [2022-12-14 13:02:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:16,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229331337] [2022-12-14 13:02:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:16,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:16,636 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 13:02:16,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:16,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229331337] [2022-12-14 13:02:16,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229331337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:16,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:16,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:02:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094768990] [2022-12-14 13:02:16,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:16,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:02:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:02:16,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:02:16,640 INFO L87 Difference]: Start difference. First operand 324 states and 466 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 13:02:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:17,151 INFO L93 Difference]: Finished difference Result 726 states and 969 transitions. [2022-12-14 13:02:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:02:17,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 13:02:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:17,155 INFO L225 Difference]: With dead ends: 726 [2022-12-14 13:02:17,155 INFO L226 Difference]: Without dead ends: 594 [2022-12-14 13:02:17,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:02:17,157 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 952 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:17,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 1209 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:02:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-12-14 13:02:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 510. [2022-12-14 13:02:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 383 states have (on average 1.3785900783289817) internal successors, (528), 389 states have internal predecessors, (528), 78 states have call successors, (78), 45 states have call predecessors, (78), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2022-12-14 13:02:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2022-12-14 13:02:17,192 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 45 [2022-12-14 13:02:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:17,192 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2022-12-14 13:02:17,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 13:02:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2022-12-14 13:02:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 13:02:17,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:17,194 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 13:02:17,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:02:17,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:17,194 INFO L85 PathProgramCache]: Analyzing trace with hash -392566252, now seen corresponding path program 1 times [2022-12-14 13:02:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:17,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881038797] [2022-12-14 13:02:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:17,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:17,394 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 13:02:17,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:17,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881038797] [2022-12-14 13:02:17,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881038797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:17,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:17,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:02:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796384160] [2022-12-14 13:02:17,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:17,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:02:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:02:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:02:17,397 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 13:02:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:17,944 INFO L93 Difference]: Finished difference Result 1026 states and 1300 transitions. [2022-12-14 13:02:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:02:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-12-14 13:02:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:17,949 INFO L225 Difference]: With dead ends: 1026 [2022-12-14 13:02:17,949 INFO L226 Difference]: Without dead ends: 724 [2022-12-14 13:02:17,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:02:17,955 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 566 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:17,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1202 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:02:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-12-14 13:02:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 689. [2022-12-14 13:02:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 508 states have (on average 1.3385826771653544) internal successors, (680), 515 states have internal predecessors, (680), 105 states have call successors, (105), 68 states have call predecessors, (105), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2022-12-14 13:02:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 894 transitions. [2022-12-14 13:02:18,010 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 894 transitions. Word has length 46 [2022-12-14 13:02:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:18,010 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 894 transitions. [2022-12-14 13:02:18,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 13:02:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 894 transitions. [2022-12-14 13:02:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 13:02:18,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:18,012 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 13:02:18,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:02:18,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1397790563, now seen corresponding path program 1 times [2022-12-14 13:02:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:18,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291284259] [2022-12-14 13:02:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:18,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:18,054 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 13:02:18,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:18,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291284259] [2022-12-14 13:02:18,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291284259] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:18,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:18,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:02:18,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363975623] [2022-12-14 13:02:18,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:18,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:02:18,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:18,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:02:18,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:18,057 INFO L87 Difference]: Start difference. First operand 689 states and 894 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 13:02:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:18,191 INFO L93 Difference]: Finished difference Result 1253 states and 1564 transitions. [2022-12-14 13:02:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:02:18,191 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 13:02:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:18,199 INFO L225 Difference]: With dead ends: 1253 [2022-12-14 13:02:18,199 INFO L226 Difference]: Without dead ends: 821 [2022-12-14 13:02:18,199 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 13:02:18,200 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 67 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:18,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 666 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-12-14 13:02:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 716. [2022-12-14 13:02:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 531 states have (on average 1.3276836158192091) internal successors, (705), 538 states have internal predecessors, (705), 107 states have call successors, (107), 70 states have call predecessors, (107), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2022-12-14 13:02:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 923 transitions. [2022-12-14 13:02:18,233 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 923 transitions. Word has length 47 [2022-12-14 13:02:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:18,234 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 923 transitions. [2022-12-14 13:02:18,234 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 13:02:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 923 transitions. [2022-12-14 13:02:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:02:18,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:18,235 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:18,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:02:18,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash -12739632, now seen corresponding path program 1 times [2022-12-14 13:02:18,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:18,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077454689] [2022-12-14 13:02:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:02:18,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077454689] [2022-12-14 13:02:18,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077454689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:18,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:18,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:02:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605633986] [2022-12-14 13:02:18,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:02:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:02:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:18,275 INFO L87 Difference]: Start difference. First operand 716 states and 923 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:02:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:18,412 INFO L93 Difference]: Finished difference Result 906 states and 1144 transitions. [2022-12-14 13:02:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:02:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-12-14 13:02:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:18,416 INFO L225 Difference]: With dead ends: 906 [2022-12-14 13:02:18,416 INFO L226 Difference]: Without dead ends: 633 [2022-12-14 13:02:18,417 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 13:02:18,418 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 372 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:18,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 411 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-12-14 13:02:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 524. [2022-12-14 13:02:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 391 states have (on average 1.3375959079283888) internal successors, (523), 396 states have internal predecessors, (523), 83 states have call successors, (83), 50 states have call predecessors, (83), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 13:02:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 685 transitions. [2022-12-14 13:02:18,448 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 685 transitions. Word has length 53 [2022-12-14 13:02:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:18,448 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 685 transitions. [2022-12-14 13:02:18,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:02:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 685 transitions. [2022-12-14 13:02:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 13:02:18,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:18,450 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 13:02:18,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:02:18,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 380549042, now seen corresponding path program 1 times [2022-12-14 13:02:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:18,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280638940] [2022-12-14 13:02:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:18,515 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 13:02:18,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:18,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280638940] [2022-12-14 13:02:18,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280638940] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:18,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:18,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:02:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956020002] [2022-12-14 13:02:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:18,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:02:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:02:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:02:18,518 INFO L87 Difference]: Start difference. First operand 524 states and 685 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 13:02:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:18,810 INFO L93 Difference]: Finished difference Result 627 states and 801 transitions. [2022-12-14 13:02:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:02:18,811 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 13:02:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:18,813 INFO L225 Difference]: With dead ends: 627 [2022-12-14 13:02:18,813 INFO L226 Difference]: Without dead ends: 624 [2022-12-14 13:02:18,814 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 13:02:18,814 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 673 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:18,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 387 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:02:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-12-14 13:02:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 523. [2022-12-14 13:02:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 391 states have (on average 1.329923273657289) internal successors, (520), 395 states have internal predecessors, (520), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 13:02:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 681 transitions. [2022-12-14 13:02:18,873 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 681 transitions. Word has length 54 [2022-12-14 13:02:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:18,873 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 681 transitions. [2022-12-14 13:02:18,874 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 13:02:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 681 transitions. [2022-12-14 13:02:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 13:02:18,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:18,875 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 13:02:18,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:02:18,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1089404980, now seen corresponding path program 1 times [2022-12-14 13:02:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:18,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200725276] [2022-12-14 13:02:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:19,020 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 13:02:19,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:19,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200725276] [2022-12-14 13:02:19,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200725276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:19,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600035433] [2022-12-14 13:02:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:19,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:19,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:19,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:19,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:02:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:19,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:02:19,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:19,345 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 13:02:19,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:19,475 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 13:02:19,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600035433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710118749] [2022-12-14 13:02:19,496 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 13:02:19,496 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:19,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:19,505 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:19,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:24,501 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 215 for LOIs [2022-12-14 13:02:24,531 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-12-14 13:02:24,547 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 211 for LOIs [2022-12-14 13:02:24,574 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 219 for LOIs [2022-12-14 13:02:25,240 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2022-12-14 13:02:25,325 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 215 for LOIs [2022-12-14 13:02:25,410 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 215 for LOIs [2022-12-14 13:02:25,440 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2022-12-14 13:02:25,469 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:45,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12910#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~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_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~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) (= ~E_11~0 2) (= ~t1_st~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) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~c_dr_pc~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) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:02:45,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:45,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:45,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 13:02:45,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915612678] [2022-12-14 13:02:45,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:02:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:45,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:02:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 13:02:45,570 INFO L87 Difference]: Start difference. First operand 523 states and 681 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 13:02:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:45,953 INFO L93 Difference]: Finished difference Result 1096 states and 1336 transitions. [2022-12-14 13:02:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:02:45,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-12-14 13:02:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:45,957 INFO L225 Difference]: With dead ends: 1096 [2022-12-14 13:02:45,957 INFO L226 Difference]: Without dead ends: 1093 [2022-12-14 13:02:45,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 13:02:45,958 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 615 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:45,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1214 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:02:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-12-14 13:02:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 818. [2022-12-14 13:02:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 596 states have (on average 1.2802013422818792) internal successors, (763), 600 states have internal predecessors, (763), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-14 13:02:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1020 transitions. [2022-12-14 13:02:46,013 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1020 transitions. Word has length 55 [2022-12-14 13:02:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:46,013 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1020 transitions. [2022-12-14 13:02:46,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 13:02:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1020 transitions. [2022-12-14 13:02:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 13:02:46,014 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:46,014 INFO L195 NwaCegarLoop]: trace histogram [3, 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 13:02:46,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:02:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:46,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:46,215 INFO L85 PathProgramCache]: Analyzing trace with hash 893069490, now seen corresponding path program 2 times [2022-12-14 13:02:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:46,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065179583] [2022-12-14 13:02:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:46,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:46,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065179583] [2022-12-14 13:02:46,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065179583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:46,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:46,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:02:46,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834741603] [2022-12-14 13:02:46,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:46,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:02:46,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:02:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:46,246 INFO L87 Difference]: Start difference. First operand 818 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 13:02:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:46,422 INFO L93 Difference]: Finished difference Result 1231 states and 1493 transitions. [2022-12-14 13:02:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:02:46,422 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), 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 58 [2022-12-14 13:02:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:46,425 INFO L225 Difference]: With dead ends: 1231 [2022-12-14 13:02:46,426 INFO L226 Difference]: Without dead ends: 820 [2022-12-14 13:02:46,426 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 13:02:46,427 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 375 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:46,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 444 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-12-14 13:02:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 814. [2022-12-14 13:02:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 592 states have (on average 1.2685810810810811) internal successors, (751), 596 states have internal predecessors, (751), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-14 13:02:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1008 transitions. [2022-12-14 13:02:46,478 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1008 transitions. Word has length 58 [2022-12-14 13:02:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:46,478 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1008 transitions. [2022-12-14 13:02:46,478 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), 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 13:02:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1008 transitions. [2022-12-14 13:02:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 13:02:46,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:46,479 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 13:02:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:02:46,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1569329060, now seen corresponding path program 1 times [2022-12-14 13:02:46,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:46,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571515827] [2022-12-14 13:02:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:46,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:46,517 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 13:02:46,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:46,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571515827] [2022-12-14 13:02:46,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571515827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:46,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:46,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:02:46,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523751353] [2022-12-14 13:02:46,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:46,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:02:46,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:46,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:02:46,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:46,519 INFO L87 Difference]: Start difference. First operand 814 states and 1008 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 13:02:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:46,724 INFO L93 Difference]: Finished difference Result 1433 states and 1718 transitions. [2022-12-14 13:02:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:02:46,725 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 13:02:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:46,729 INFO L225 Difference]: With dead ends: 1433 [2022-12-14 13:02:46,729 INFO L226 Difference]: Without dead ends: 1070 [2022-12-14 13:02:46,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:46,731 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 42 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:46,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 702 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-12-14 13:02:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 889. [2022-12-14 13:02:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 653 states have (on average 1.2649310872894335) internal successors, (826), 657 states have internal predecessors, (826), 137 states have call successors, (137), 99 states have call predecessors, (137), 97 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-12-14 13:02:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1097 transitions. [2022-12-14 13:02:46,802 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1097 transitions. Word has length 61 [2022-12-14 13:02:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:46,802 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1097 transitions. [2022-12-14 13:02:46,802 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 13:02:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1097 transitions. [2022-12-14 13:02:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 13:02:46,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:46,804 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:46,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:02:46,804 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:46,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1176341863, now seen corresponding path program 1 times [2022-12-14 13:02:46,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:46,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523975856] [2022-12-14 13:02:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:46,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:02:46,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523975856] [2022-12-14 13:02:46,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523975856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:46,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:46,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:02:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607922317] [2022-12-14 13:02:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:46,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:02:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:02:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:02:46,936 INFO L87 Difference]: Start difference. First operand 889 states and 1097 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 13:02:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:47,597 INFO L93 Difference]: Finished difference Result 1938 states and 2280 transitions. [2022-12-14 13:02:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:02:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 70 [2022-12-14 13:02:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:47,602 INFO L225 Difference]: With dead ends: 1938 [2022-12-14 13:02:47,602 INFO L226 Difference]: Without dead ends: 1257 [2022-12-14 13:02:47,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:02:47,604 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 548 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:47,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1018 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:02:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-12-14 13:02:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1208. [2022-12-14 13:02:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 867 states have (on average 1.2249134948096885) internal successors, (1062), 871 states have internal predecessors, (1062), 193 states have call successors, (193), 148 states have call predecessors, (193), 146 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-12-14 13:02:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1445 transitions. [2022-12-14 13:02:47,705 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1445 transitions. Word has length 70 [2022-12-14 13:02:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:47,705 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1445 transitions. [2022-12-14 13:02:47,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 13:02:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1445 transitions. [2022-12-14 13:02:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 13:02:47,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:47,707 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 13:02:47,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:02:47,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash -310879495, now seen corresponding path program 1 times [2022-12-14 13:02:47,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:47,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766828522] [2022-12-14 13:02:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:47,746 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 13:02:47,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:47,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766828522] [2022-12-14 13:02:47,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766828522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:47,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:02:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115483268] [2022-12-14 13:02:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:02:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:02:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:47,747 INFO L87 Difference]: Start difference. First operand 1208 states and 1445 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 13:02:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:47,961 INFO L93 Difference]: Finished difference Result 2174 states and 2539 transitions. [2022-12-14 13:02:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:02:47,961 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 13:02:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:47,966 INFO L225 Difference]: With dead ends: 2174 [2022-12-14 13:02:47,966 INFO L226 Difference]: Without dead ends: 1384 [2022-12-14 13:02:47,968 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 13:02:47,968 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 37 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:47,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 696 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-12-14 13:02:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1255. [2022-12-14 13:02:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 906 states have (on average 1.2229580573951435) internal successors, (1108), 910 states have internal predecessors, (1108), 197 states have call successors, (197), 152 states have call predecessors, (197), 150 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-12-14 13:02:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1499 transitions. [2022-12-14 13:02:48,075 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1499 transitions. Word has length 71 [2022-12-14 13:02:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:48,075 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1499 transitions. [2022-12-14 13:02:48,076 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 13:02:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1499 transitions. [2022-12-14 13:02:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 13:02:48,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:48,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:48,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:02:48,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash -94283936, now seen corresponding path program 1 times [2022-12-14 13:02:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526336042] [2022-12-14 13:02:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:48,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:48,159 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 13:02:48,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:48,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526336042] [2022-12-14 13:02:48,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526336042] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:48,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:48,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:02:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775799421] [2022-12-14 13:02:48,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:02:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:02:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:02:48,161 INFO L87 Difference]: Start difference. First operand 1255 states and 1499 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 13:02:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:49,043 INFO L93 Difference]: Finished difference Result 2198 states and 3071 transitions. [2022-12-14 13:02:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:02:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 71 [2022-12-14 13:02:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:49,054 INFO L225 Difference]: With dead ends: 2198 [2022-12-14 13:02:49,054 INFO L226 Difference]: Without dead ends: 2001 [2022-12-14 13:02:49,056 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 13:02:49,057 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 1553 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:49,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 1584 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:02:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-12-14 13:02:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1988. [2022-12-14 13:02:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1526 states have (on average 1.3499344692005242) internal successors, (2060), 1533 states have internal predecessors, (2060), 286 states have call successors, (286), 176 states have call predecessors, (286), 174 states have return successors, (349), 280 states have call predecessors, (349), 283 states have call successors, (349) [2022-12-14 13:02:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2695 transitions. [2022-12-14 13:02:49,261 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2695 transitions. Word has length 71 [2022-12-14 13:02:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:49,261 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2695 transitions. [2022-12-14 13:02:49,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 13:02:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2695 transitions. [2022-12-14 13:02:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 13:02:49,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:49,263 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 13:02:49,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:02:49,263 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:49,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1208035001, now seen corresponding path program 1 times [2022-12-14 13:02:49,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:49,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102580123] [2022-12-14 13:02:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:49,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:49,510 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 13:02:49,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:49,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102580123] [2022-12-14 13:02:49,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102580123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:49,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875203207] [2022-12-14 13:02:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:49,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:49,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:49,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:02:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:49,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:02:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:49,656 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 13:02:49,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:02:49,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875203207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:49,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:02:49,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 13:02:49,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863508290] [2022-12-14 13:02:49,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:49,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:02:49,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:49,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:02:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:02:49,658 INFO L87 Difference]: Start difference. First operand 1988 states and 2695 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 13:02:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:50,038 INFO L93 Difference]: Finished difference Result 2852 states and 3700 transitions. [2022-12-14 13:02:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:02:50,038 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 13:02:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:50,043 INFO L225 Difference]: With dead ends: 2852 [2022-12-14 13:02:50,044 INFO L226 Difference]: Without dead ends: 1805 [2022-12-14 13:02:50,045 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 13:02:50,046 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 369 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:50,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1433 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:02:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-12-14 13:02:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1620. [2022-12-14 13:02:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1289 states have (on average 1.3886733902249806) internal successors, (1790), 1296 states have internal predecessors, (1790), 215 states have call successors, (215), 116 states have call predecessors, (215), 114 states have return successors, (278), 209 states have call predecessors, (278), 212 states have call successors, (278) [2022-12-14 13:02:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2283 transitions. [2022-12-14 13:02:50,172 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2283 transitions. Word has length 102 [2022-12-14 13:02:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:50,173 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 2283 transitions. [2022-12-14 13:02:50,173 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 13:02:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2283 transitions. [2022-12-14 13:02:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 13:02:50,174 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:50,174 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 13:02:50,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:02:50,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:02:50,376 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1403134554, now seen corresponding path program 1 times [2022-12-14 13:02:50,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:50,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85713673] [2022-12-14 13:02:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:50,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:50,615 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 13:02:50,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:50,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85713673] [2022-12-14 13:02:50,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85713673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:50,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516710479] [2022-12-14 13:02:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:50,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:50,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:50,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:02:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:02:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:50,796 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 13:02:50,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:02:50,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516710479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:50,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:02:50,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 13:02:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868043389] [2022-12-14 13:02:50,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:50,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:02:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:02:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:02:50,798 INFO L87 Difference]: Start difference. First operand 1620 states and 2283 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 13:02:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:51,207 INFO L93 Difference]: Finished difference Result 2169 states and 2908 transitions. [2022-12-14 13:02:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:02:51,207 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 13:02:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:51,213 INFO L225 Difference]: With dead ends: 2169 [2022-12-14 13:02:51,214 INFO L226 Difference]: Without dead ends: 1576 [2022-12-14 13:02:51,215 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 13:02:51,216 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 63 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:51,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1802 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:02:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-12-14 13:02:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1484. [2022-12-14 13:02:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1189 states have (on average 1.4070647603027755) internal successors, (1673), 1196 states have internal predecessors, (1673), 196 states have call successors, (196), 99 states have call predecessors, (196), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2022-12-14 13:02:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2128 transitions. [2022-12-14 13:02:51,322 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2128 transitions. Word has length 112 [2022-12-14 13:02:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:51,323 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2128 transitions. [2022-12-14 13:02:51,323 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 13:02:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2128 transitions. [2022-12-14 13:02:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 13:02:51,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:51,324 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 13:02:51,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:02:51,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:02:51,525 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash -583992466, now seen corresponding path program 1 times [2022-12-14 13:02:51,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:51,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471142753] [2022-12-14 13:02:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:51,628 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 13:02:51,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471142753] [2022-12-14 13:02:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471142753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016889240] [2022-12-14 13:02:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:51,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:51,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:51,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:02:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:02:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:51,799 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 13:02:51,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:02:51,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016889240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:51,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:02:51,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 13:02:51,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036041400] [2022-12-14 13:02:51,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:51,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:02:51,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:02:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:02:51,801 INFO L87 Difference]: Start difference. First operand 1484 states and 2128 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 13:02:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:52,130 INFO L93 Difference]: Finished difference Result 2233 states and 2973 transitions. [2022-12-14 13:02:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:02:52,131 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 13:02:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:52,138 INFO L225 Difference]: With dead ends: 2233 [2022-12-14 13:02:52,138 INFO L226 Difference]: Without dead ends: 1776 [2022-12-14 13:02:52,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:02:52,140 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 355 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:52,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1526 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-12-14 13:02:52,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1742. [2022-12-14 13:02:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1351 states have (on average 1.3715766099185789) internal successors, (1853), 1364 states have internal predecessors, (1853), 244 states have call successors, (244), 141 states have call predecessors, (244), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2022-12-14 13:02:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 2416 transitions. [2022-12-14 13:02:52,276 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 2416 transitions. Word has length 113 [2022-12-14 13:02:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:52,276 INFO L495 AbstractCegarLoop]: Abstraction has 1742 states and 2416 transitions. [2022-12-14 13:02:52,276 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 13:02:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 2416 transitions. [2022-12-14 13:02:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 13:02:52,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:52,278 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 13:02:52,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:02:52,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:52,480 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1593739585, now seen corresponding path program 1 times [2022-12-14 13:02:52,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:52,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198780693] [2022-12-14 13:02:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:52,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:53,199 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 13:02:53,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198780693] [2022-12-14 13:02:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198780693] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722382917] [2022-12-14 13:02:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:53,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:53,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:02:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:53,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 13:02:53,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:53,837 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 13:02:53,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:54,872 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 13:02:54,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722382917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032719484] [2022-12-14 13:02:54,876 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 13:02:54,876 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:54,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:54,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:54,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:19,564 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-12-14 13:04:20,799 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 343 for LOIs [2022-12-14 13:04:20,950 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 334 for LOIs [2022-12-14 13:04:21,103 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-12-14 13:04:25,371 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-12-14 13:04:25,892 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 168 for LOIs [2022-12-14 13:04:26,412 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-12-14 13:04:28,179 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-12-14 13:04:29,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:47,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56814#(and (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T13_E~0 2) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 0 ~t13_i~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= 2 ~E_13~0) (= ~t7_i~0 0) (<= 0 ~t5_st~0) (<= ~t12_i~0 0) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= 0 ~t13_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 2 ~T13_E~0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= ~t13_pc~0 0) (<= 0 ~t13_pc~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 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)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~E_13~0 2) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~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) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t13_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (<= ~T12_E~0 2) (<= ~t13_i~0 0))' at error location [2022-12-14 13:05:47,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:05:47,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:05:47,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 13:05:47,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560561538] [2022-12-14 13:05:47,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:05:47,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 13:05:47,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 13:05:47,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=10543, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 13:05:47,606 INFO L87 Difference]: Start difference. First operand 1742 states and 2416 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 13:06:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:07,654 INFO L93 Difference]: Finished difference Result 4253 states and 5332 transitions. [2022-12-14 13:06:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 13:06:07,655 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 13:06:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:07,662 INFO L225 Difference]: With dead ends: 4253 [2022-12-14 13:06:07,662 INFO L226 Difference]: Without dead ends: 3538 [2022-12-14 13:06:07,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44229 ImplicationChecksByTransitivity, 94.1s TimeCoverageRelationStatistics Valid=10086, Invalid=99144, Unknown=0, NotChecked=0, Total=109230 [2022-12-14 13:06:07,675 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 6135 mSDsluCounter, 3287 mSDsCounter, 0 mSdLazyCounter, 9060 mSolverCounterSat, 3105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6135 SdHoareTripleChecker+Valid, 3563 SdHoareTripleChecker+Invalid, 12165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3105 IncrementalHoareTripleChecker+Valid, 9060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:07,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6135 Valid, 3563 Invalid, 12165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3105 Valid, 9060 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 13:06:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2022-12-14 13:06:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2018. [2022-12-14 13:06:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1535 states have (on average 1.3446254071661239) internal successors, (2064), 1550 states have internal predecessors, (2064), 289 states have call successors, (289), 178 states have call predecessors, (289), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2022-12-14 13:06:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2729 transitions. [2022-12-14 13:06:07,910 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2729 transitions. Word has length 114 [2022-12-14 13:06:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:07,910 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 2729 transitions. [2022-12-14 13:06:07,911 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 13:06:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2729 transitions. [2022-12-14 13:06:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 13:06:07,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:07,912 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 13:06:07,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:06:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:06:08,114 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:08,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1450785223, now seen corresponding path program 1 times [2022-12-14 13:06:08,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:08,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282358123] [2022-12-14 13:06:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:08,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:08,344 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 13:06:08,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282358123] [2022-12-14 13:06:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282358123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785215526] [2022-12-14 13:06:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:08,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:08,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:08,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:08,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:06:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:08,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:06:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:08,530 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 13:06:08,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:08,664 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 13:06:08,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785215526] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:08,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:06:08,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 13:06:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460720795] [2022-12-14 13:06:08,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:08,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:06:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:06:08,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 13:06:08,666 INFO L87 Difference]: Start difference. First operand 2018 states and 2729 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 13:06:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:09,461 INFO L93 Difference]: Finished difference Result 3342 states and 4277 transitions. [2022-12-14 13:06:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:06:09,462 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 13:06:09,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:09,467 INFO L225 Difference]: With dead ends: 3342 [2022-12-14 13:06:09,467 INFO L226 Difference]: Without dead ends: 2351 [2022-12-14 13:06:09,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:06:09,469 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 561 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:09,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 618 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:06:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2022-12-14 13:06:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2098. [2022-12-14 13:06:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1580 states have (on average 1.3386075949367089) internal successors, (2115), 1598 states have internal predecessors, (2115), 308 states have call successors, (308), 187 states have call predecessors, (308), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2022-12-14 13:06:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2839 transitions. [2022-12-14 13:06:09,717 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2839 transitions. Word has length 115 [2022-12-14 13:06:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:09,718 INFO L495 AbstractCegarLoop]: Abstraction has 2098 states and 2839 transitions. [2022-12-14 13:06:09,718 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 13:06:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2839 transitions. [2022-12-14 13:06:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 13:06:09,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:09,719 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 13:06:09,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:06:09,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:06:09,921 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash 857159524, now seen corresponding path program 1 times [2022-12-14 13:06:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741539237] [2022-12-14 13:06:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:09,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:10,526 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 13:06:10,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741539237] [2022-12-14 13:06:10,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741539237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480501373] [2022-12-14 13:06:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:10,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:10,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:10,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:10,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:06:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:10,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 13:06:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:11,254 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 13:06:11,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:12,445 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 13:06:12,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480501373] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:12,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138080855] [2022-12-14 13:06:12,447 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 13:06:12,447 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:06:12,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:06:12,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:06:12,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:06:39,223 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-12-14 13:06:40,417 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 182 for LOIs [2022-12-14 13:06:40,432 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-12-14 13:06:40,451 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-12-14 13:06:44,583 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-12-14 13:06:45,131 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2022-12-14 13:06:45,661 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-12-14 13:06:46,769 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-12-14 13:06:47,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:07:55,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75807#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~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_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~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_dr_pc~0 1) (= ~E_11~0 2) (= ~t1_st~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) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_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) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:07:55,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:07:55,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:07:55,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 13:07:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682987589] [2022-12-14 13:07:55,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:07:55,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 13:07:55,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:07:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 13:07:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 13:07:55,028 INFO L87 Difference]: Start difference. First operand 2098 states and 2839 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 13:08:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:09,547 INFO L93 Difference]: Finished difference Result 4382 states and 5541 transitions. [2022-12-14 13:08:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 13:08:09,548 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 13:08:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:09,566 INFO L225 Difference]: With dead ends: 4382 [2022-12-14 13:08:09,566 INFO L226 Difference]: Without dead ends: 3311 [2022-12-14 13:08:09,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 318 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26829 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=6762, Invalid=61620, Unknown=0, NotChecked=0, Total=68382 [2022-12-14 13:08:09,573 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 6445 mSDsluCounter, 3903 mSDsCounter, 0 mSdLazyCounter, 9740 mSolverCounterSat, 3572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6445 SdHoareTripleChecker+Valid, 4180 SdHoareTripleChecker+Invalid, 13312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3572 IncrementalHoareTripleChecker+Valid, 9740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:09,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6445 Valid, 4180 Invalid, 13312 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3572 Valid, 9740 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 13:08:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2022-12-14 13:08:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 1914. [2022-12-14 13:08:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1468 states have (on average 1.353542234332425) internal successors, (1987), 1485 states have internal predecessors, (1987), 268 states have call successors, (268), 155 states have call predecessors, (268), 176 states have return successors, (366), 275 states have call predecessors, (366), 265 states have call successors, (366) [2022-12-14 13:08:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2621 transitions. [2022-12-14 13:08:09,907 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2621 transitions. Word has length 124 [2022-12-14 13:08:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:09,907 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2621 transitions. [2022-12-14 13:08:09,908 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 13:08:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2621 transitions. [2022-12-14 13:08:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:08:09,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:09,909 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 13:08:09,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:08:10,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:08:10,110 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1400899632, now seen corresponding path program 1 times [2022-12-14 13:08:10,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:10,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094682791] [2022-12-14 13:08:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:10,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:10,233 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 13:08:10,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:10,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094682791] [2022-12-14 13:08:10,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094682791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:10,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005428822] [2022-12-14 13:08:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:10,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:10,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:10,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:10,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:08:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:08:10,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:10,396 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 13:08:10,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:10,532 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 13:08:10,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005428822] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:10,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:08:10,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 13:08:10,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635456363] [2022-12-14 13:08:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:10,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:08:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:08:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:08:10,535 INFO L87 Difference]: Start difference. First operand 1914 states and 2621 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 13:08:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:11,454 INFO L93 Difference]: Finished difference Result 2569 states and 3362 transitions. [2022-12-14 13:08:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 13:08:11,454 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 13:08:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:11,460 INFO L225 Difference]: With dead ends: 2569 [2022-12-14 13:08:11,461 INFO L226 Difference]: Without dead ends: 1682 [2022-12-14 13:08:11,462 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 13:08:11,463 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 795 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:11,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 920 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:08:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-12-14 13:08:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1645. [2022-12-14 13:08:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1269 states have (on average 1.3727344365642238) internal successors, (1742), 1286 states have internal predecessors, (1742), 232 states have call successors, (232), 125 states have call predecessors, (232), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2022-12-14 13:08:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2299 transitions. [2022-12-14 13:08:11,687 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2299 transitions. Word has length 125 [2022-12-14 13:08:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:11,687 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2299 transitions. [2022-12-14 13:08:11,687 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 13:08:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2299 transitions. [2022-12-14 13:08:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:08:11,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:11,689 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, 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 13:08:11,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:08:11,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:11,890 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 241742014, now seen corresponding path program 1 times [2022-12-14 13:08:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722957721] [2022-12-14 13:08:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:11,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:08:11,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722957721] [2022-12-14 13:08:11,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722957721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484950253] [2022-12-14 13:08:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:11,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:11,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:12,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:12,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:08:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:08:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:08:12,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:12,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484950253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:12,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:12,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:08:12,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054053065] [2022-12-14 13:08:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:08:12,203 INFO L87 Difference]: Start difference. First operand 1645 states and 2299 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 13:08:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:12,650 INFO L93 Difference]: Finished difference Result 3489 states and 5408 transitions. [2022-12-14 13:08:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 144 [2022-12-14 13:08:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:12,661 INFO L225 Difference]: With dead ends: 3489 [2022-12-14 13:08:12,661 INFO L226 Difference]: Without dead ends: 2559 [2022-12-14 13:08:12,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 13:08:12,665 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 350 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:12,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 602 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-12-14 13:08:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2550. [2022-12-14 13:08:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2037 states have (on average 1.432007854688267) internal successors, (2917), 2057 states have internal predecessors, (2917), 339 states have call successors, (339), 155 states have call predecessors, (339), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2022-12-14 13:08:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3750 transitions. [2022-12-14 13:08:12,997 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3750 transitions. Word has length 144 [2022-12-14 13:08:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:12,997 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3750 transitions. [2022-12-14 13:08:12,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 13:08:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3750 transitions. [2022-12-14 13:08:13,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:08:13,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:13,000 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, 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 13:08:13,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:08:13,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:13,201 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash 160685376, now seen corresponding path program 1 times [2022-12-14 13:08:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:13,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121566120] [2022-12-14 13:08:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:13,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:08:13,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:13,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121566120] [2022-12-14 13:08:13,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121566120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:13,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409920894] [2022-12-14 13:08:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:13,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:13,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:13,293 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:13,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:08:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:08:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:13,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:13,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409920894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:13,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:13,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:08:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700969200] [2022-12-14 13:08:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:13,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:08:13,453 INFO L87 Difference]: Start difference. First operand 2550 states and 3750 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 13:08:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:14,038 INFO L93 Difference]: Finished difference Result 6189 states and 9862 transitions. [2022-12-14 13:08:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 144 [2022-12-14 13:08:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:14,050 INFO L225 Difference]: With dead ends: 6189 [2022-12-14 13:08:14,050 INFO L226 Difference]: Without dead ends: 4354 [2022-12-14 13:08:14,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 13:08:14,055 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 341 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:14,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 602 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-12-14 13:08:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4340. [2022-12-14 13:08:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4340 states, 3558 states have (on average 1.471894322653176) internal successors, (5237), 3584 states have internal predecessors, (5237), 548 states have call successors, (548), 215 states have call predecessors, (548), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2022-12-14 13:08:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 6608 transitions. [2022-12-14 13:08:14,540 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 6608 transitions. Word has length 144 [2022-12-14 13:08:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:14,540 INFO L495 AbstractCegarLoop]: Abstraction has 4340 states and 6608 transitions. [2022-12-14 13:08:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 13:08:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 6608 transitions. [2022-12-14 13:08:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:08:14,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:14,544 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, 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 13:08:14,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:08:14,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:14,746 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1194969474, now seen corresponding path program 1 times [2022-12-14 13:08:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506322616] [2022-12-14 13:08:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:08:14,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:14,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506322616] [2022-12-14 13:08:14,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506322616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:14,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348008632] [2022-12-14 13:08:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:14,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:14,851 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:14,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:08:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:15,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:08:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 13:08:15,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:15,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348008632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:15,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:15,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:08:15,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395898153] [2022-12-14 13:08:15,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:15,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:15,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:08:15,056 INFO L87 Difference]: Start difference. First operand 4340 states and 6608 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 13:08:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:15,942 INFO L93 Difference]: Finished difference Result 11529 states and 18629 transitions. [2022-12-14 13:08:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 144 [2022-12-14 13:08:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:15,960 INFO L225 Difference]: With dead ends: 11529 [2022-12-14 13:08:15,960 INFO L226 Difference]: Without dead ends: 7904 [2022-12-14 13:08:15,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 13:08:15,970 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 371 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:15,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 602 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2022-12-14 13:08:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 7880. [2022-12-14 13:08:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 6570 states have (on average 1.4942161339421614) internal successors, (9817), 6608 states have internal predecessors, (9817), 956 states have call successors, (956), 335 states have call predecessors, (956), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2022-12-14 13:08:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 12236 transitions. [2022-12-14 13:08:16,806 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 12236 transitions. Word has length 144 [2022-12-14 13:08:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:16,806 INFO L495 AbstractCegarLoop]: Abstraction has 7880 states and 12236 transitions. [2022-12-14 13:08:16,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 13:08:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 12236 transitions. [2022-12-14 13:08:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:08:16,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:16,815 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, 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 13:08:16,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:08:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:17,016 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1115115324, now seen corresponding path program 1 times [2022-12-14 13:08:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639645145] [2022-12-14 13:08:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:08:17,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639645145] [2022-12-14 13:08:17,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639645145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189258079] [2022-12-14 13:08:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:17,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:17,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:17,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:08:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:17,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:08:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:08:17,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:17,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189258079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:17,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:17,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:08:17,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255343528] [2022-12-14 13:08:17,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:17,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:17,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:17,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:08:17,330 INFO L87 Difference]: Start difference. First operand 7880 states and 12236 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 13:08:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:18,981 INFO L93 Difference]: Finished difference Result 22089 states and 35881 transitions. [2022-12-14 13:08:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:18,982 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 144 [2022-12-14 13:08:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:19,044 INFO L225 Difference]: With dead ends: 22089 [2022-12-14 13:08:19,044 INFO L226 Difference]: Without dead ends: 14924 [2022-12-14 13:08:19,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 13:08:19,069 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 362 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:19,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 602 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14924 states. [2022-12-14 13:08:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14924 to 14880. [2022-12-14 13:08:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 12534 states have (on average 1.5044678474549227) internal successors, (18857), 12596 states have internal predecessors, (18857), 1752 states have call successors, (1752), 575 states have call predecessors, (1752), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2022-12-14 13:08:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 23316 transitions. [2022-12-14 13:08:20,695 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 23316 transitions. Word has length 144 [2022-12-14 13:08:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:20,695 INFO L495 AbstractCegarLoop]: Abstraction has 14880 states and 23316 transitions. [2022-12-14 13:08:20,695 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 13:08:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 23316 transitions. [2022-12-14 13:08:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:08:20,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:20,705 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, 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 13:08:20,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:08:20,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 13:08:20,906 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2026490046, now seen corresponding path program 1 times [2022-12-14 13:08:20,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768635083] [2022-12-14 13:08:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:20,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:08:20,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:20,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768635083] [2022-12-14 13:08:20,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768635083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:21,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887930661] [2022-12-14 13:08:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:21,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:21,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:21,001 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:21,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:08:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:08:21,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:08:21,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:21,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887930661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:21,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:21,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:08:21,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564807180] [2022-12-14 13:08:21,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:21,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:21,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:08:21,191 INFO L87 Difference]: Start difference. First operand 14880 states and 23316 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 13:08:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:24,298 INFO L93 Difference]: Finished difference Result 42969 states and 69821 transitions. [2022-12-14 13:08:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:24,298 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 144 [2022-12-14 13:08:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:24,378 INFO L225 Difference]: With dead ends: 42969 [2022-12-14 13:08:24,378 INFO L226 Difference]: Without dead ends: 28804 [2022-12-14 13:08:24,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 13:08:24,416 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 368 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:24,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 602 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28804 states. [2022-12-14 13:08:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28804 to 28720. [2022-12-14 13:08:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28720 states, 24342 states have (on average 1.5075589516062773) internal successors, (36697), 24452 states have internal predecessors, (36697), 3304 states have call successors, (3304), 1055 states have call predecessors, (3304), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2022-12-14 13:08:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28720 states to 28720 states and 45124 transitions. [2022-12-14 13:08:27,763 INFO L78 Accepts]: Start accepts. Automaton has 28720 states and 45124 transitions. Word has length 144 [2022-12-14 13:08:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:27,763 INFO L495 AbstractCegarLoop]: Abstraction has 28720 states and 45124 transitions. [2022-12-14 13:08:27,763 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 13:08:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28720 states and 45124 transitions. [2022-12-14 13:08:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:08:27,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:27,783 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, 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 13:08:27,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:08:27,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:08:27,983 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:27,984 INFO L85 PathProgramCache]: Analyzing trace with hash -662202176, now seen corresponding path program 1 times [2022-12-14 13:08:27,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:27,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612092859] [2022-12-14 13:08:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:08:28,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612092859] [2022-12-14 13:08:28,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612092859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920775761] [2022-12-14 13:08:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:28,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:28,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:08:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:28,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:08:28,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:08:28,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:28,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920775761] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:28,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:28,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:08:28,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308799960] [2022-12-14 13:08:28,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:28,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:08:28,263 INFO L87 Difference]: Start difference. First operand 28720 states and 45124 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 13:08:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:34,406 INFO L93 Difference]: Finished difference Result 84249 states and 136573 transitions. [2022-12-14 13:08:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 144 [2022-12-14 13:08:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:34,581 INFO L225 Difference]: With dead ends: 84249 [2022-12-14 13:08:34,581 INFO L226 Difference]: Without dead ends: 56244 [2022-12-14 13:08:34,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 13:08:34,652 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 356 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:34,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 602 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2022-12-14 13:08:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 56080. [2022-12-14 13:08:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56080 states, 47718 states have (on average 1.5067060647973511) internal successors, (71897), 47924 states have internal predecessors, (71897), 6328 states have call successors, (6328), 2015 states have call predecessors, (6328), 2032 states have return successors, (9811), 6142 states have call predecessors, (9811), 6325 states have call successors, (9811) [2022-12-14 13:08:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56080 states to 56080 states and 88036 transitions. [2022-12-14 13:08:40,573 INFO L78 Accepts]: Start accepts. Automaton has 56080 states and 88036 transitions. Word has length 144 [2022-12-14 13:08:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:40,573 INFO L495 AbstractCegarLoop]: Abstraction has 56080 states and 88036 transitions. [2022-12-14 13:08:40,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 13:08:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 56080 states and 88036 transitions. [2022-12-14 13:08:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:08:40,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:40,609 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, 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 13:08:40,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:08:40,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:40,810 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash -158606398, now seen corresponding path program 1 times [2022-12-14 13:08:40,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:40,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407850857] [2022-12-14 13:08:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:08:40,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:40,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407850857] [2022-12-14 13:08:40,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407850857] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:40,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442840011] [2022-12-14 13:08:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:40,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:40,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:40,904 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:40,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:08:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:08:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:08:41,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:41,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442840011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:41,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:41,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:08:41,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701317689] [2022-12-14 13:08:41,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:41,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:08:41,095 INFO L87 Difference]: Start difference. First operand 56080 states and 88036 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 13:08:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:52,166 INFO L93 Difference]: Finished difference Result 165849 states and 267821 transitions. [2022-12-14 13:08:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:52,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 144 [2022-12-14 13:08:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:52,466 INFO L225 Difference]: With dead ends: 165849 [2022-12-14 13:08:52,466 INFO L226 Difference]: Without dead ends: 110484 [2022-12-14 13:08:52,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 13:08:52,586 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 347 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:52,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 602 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110484 states. [2022-12-14 13:09:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110484 to 110160. [2022-12-14 13:09:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110160 states, 93990 states have (on average 1.5037450792637514) internal successors, (141337), 94388 states have internal predecessors, (141337), 12216 states have call successors, (12216), 3935 states have call predecessors, (12216), 3952 states have return successors, (18899), 11838 states have call predecessors, (18899), 12213 states have call successors, (18899) [2022-12-14 13:09:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110160 states to 110160 states and 172452 transitions. [2022-12-14 13:09:03,757 INFO L78 Accepts]: Start accepts. Automaton has 110160 states and 172452 transitions. Word has length 144 [2022-12-14 13:09:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:03,757 INFO L495 AbstractCegarLoop]: Abstraction has 110160 states and 172452 transitions. [2022-12-14 13:09:03,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 13:09:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 110160 states and 172452 transitions. [2022-12-14 13:09:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:09:03,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:03,829 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, 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 13:09:03,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:09:04,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9f49ea-2e20-4262-8b7f-131a138b5634/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 13:09:04,031 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash -761672064, now seen corresponding path program 1 times [2022-12-14 13:09:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:04,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625272895] [2022-12-14 13:09:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:09:04,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625272895] [2022-12-14 13:09:04,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625272895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:04,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:09:04,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:09:04,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841258787] [2022-12-14 13:09:04,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:04,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:09:04,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:09:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:09:04,283 INFO L87 Difference]: Start difference. First operand 110160 states and 172452 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 13:09:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:31,903 INFO L93 Difference]: Finished difference Result 380888 states and 600171 transitions. [2022-12-14 13:09:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:09:31,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 144 [2022-12-14 13:09:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:32,918 INFO L225 Difference]: With dead ends: 380888 [2022-12-14 13:09:32,918 INFO L226 Difference]: Without dead ends: 271444 [2022-12-14 13:09:33,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:09:33,240 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 1232 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:33,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 1089 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:09:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271444 states. [2022-12-14 13:09:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271444 to 215760. [2022-12-14 13:09:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215760 states, 184294 states have (on average 1.4996527287920387) internal successors, (276377), 185076 states have internal predecessors, (276377), 23672 states have call successors, (23672), 7775 states have call predecessors, (23672), 7792 states have return successors, (36499), 22910 states have call predecessors, (36499), 23669 states have call successors, (36499) [2022-12-14 13:09:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215760 states to 215760 states and 336548 transitions. [2022-12-14 13:09:59,122 INFO L78 Accepts]: Start accepts. Automaton has 215760 states and 336548 transitions. Word has length 144 [2022-12-14 13:09:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:59,123 INFO L495 AbstractCegarLoop]: Abstraction has 215760 states and 336548 transitions. [2022-12-14 13:09:59,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 13:09:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 215760 states and 336548 transitions. [2022-12-14 13:09:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:09:59,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:59,265 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, 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 13:09:59,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 13:09:59,266 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash -767432628, now seen corresponding path program 1 times [2022-12-14 13:09:59,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:59,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601031830] [2022-12-14 13:09:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:59,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:09:59,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:59,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601031830] [2022-12-14 13:09:59,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601031830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:59,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:09:59,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:09:59,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450087131] [2022-12-14 13:09:59,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:59,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:09:59,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:09:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:09:59,527 INFO L87 Difference]: Start difference. First operand 215760 states and 336548 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 13:10:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:10:42,961 INFO L93 Difference]: Finished difference Result 586968 states and 921642 transitions. [2022-12-14 13:10:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:10:42,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 145 [2022-12-14 13:10:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:10:44,392 INFO L225 Difference]: With dead ends: 586968 [2022-12-14 13:10:44,392 INFO L226 Difference]: Without dead ends: 371924 [2022-12-14 13:10:44,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:10:44,997 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1166 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:10:44,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 956 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:10:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371924 states. [2022-12-14 13:11:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371924 to 320720. [2022-12-14 13:11:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320720 states, 273958 states have (on average 1.495911782097986) internal successors, (409817), 275124 states have internal predecessors, (409817), 35128 states have call successors, (35128), 11615 states have call predecessors, (35128), 11632 states have return successors, (54099), 33982 states have call predecessors, (54099), 35125 states have call successors, (54099) [2022-12-14 13:11:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320720 states to 320720 states and 499044 transitions. [2022-12-14 13:11:27,220 INFO L78 Accepts]: Start accepts. Automaton has 320720 states and 499044 transitions. Word has length 145 [2022-12-14 13:11:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:11:27,220 INFO L495 AbstractCegarLoop]: Abstraction has 320720 states and 499044 transitions. [2022-12-14 13:11:27,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 13:11:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 320720 states and 499044 transitions. [2022-12-14 13:11:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:11:27,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:11:27,442 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, 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 13:11:27,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 13:11:27,442 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:11:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:11:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1221800700, now seen corresponding path program 1 times [2022-12-14 13:11:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:11:27,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771559014] [2022-12-14 13:11:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:11:27,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:11:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:11:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:11:27,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:11:27,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771559014] [2022-12-14 13:11:27,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771559014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:11:27,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:11:27,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:11:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297071892] [2022-12-14 13:11:27,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:11:27,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:11:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:11:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:11:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:11:27,704 INFO L87 Difference]: Start difference. First operand 320720 states and 499044 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 13:12:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:33,217 INFO L93 Difference]: Finished difference Result 866968 states and 1359690 transitions. [2022-12-14 13:12:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:12:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 146 [2022-12-14 13:12:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:35,529 INFO L225 Difference]: With dead ends: 866968 [2022-12-14 13:12:35,530 INFO L226 Difference]: Without dead ends: 546964 [2022-12-14 13:12:36,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:12:36,483 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1143 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:36,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 946 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:12:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546964 states. [2022-12-14 13:13:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546964 to 476880. [2022-12-14 13:13:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476880 states, 407334 states have (on average 1.4919869198250084) internal successors, (607737), 409076 states have internal predecessors, (607737), 52152 states have call successors, (52152), 17375 states have call predecessors, (52152), 17392 states have return successors, (80211), 50430 states have call predecessors, (80211), 52149 states have call successors, (80211) [2022-12-14 13:13:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476880 states to 476880 states and 740100 transitions. [2022-12-14 13:13:38,172 INFO L78 Accepts]: Start accepts. Automaton has 476880 states and 740100 transitions. Word has length 146 [2022-12-14 13:13:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:38,172 INFO L495 AbstractCegarLoop]: Abstraction has 476880 states and 740100 transitions. [2022-12-14 13:13:38,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 13:13:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 476880 states and 740100 transitions. [2022-12-14 13:13:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 13:13:38,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:38,495 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, 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 13:13:38,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 13:13:38,496 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash 339741128, now seen corresponding path program 1 times [2022-12-14 13:13:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826637034] [2022-12-14 13:13:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:13:38,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826637034] [2022-12-14 13:13:38,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826637034] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:38,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:38,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:13:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492953184] [2022-12-14 13:13:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:38,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:13:38,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:13:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:38,908 INFO L87 Difference]: Start difference. First operand 476880 states and 740100 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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)