./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/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_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/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_8e707566-d70e-4bfb-b9b7-8f880995bd21/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 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- 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 15:05:37,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:05:37,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:05:37,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:05:37,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:05:37,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:05:37,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:05:37,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:05:37,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:05:37,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:05:37,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:05:37,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:05:37,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:05:37,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:05:37,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:05:37,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:05:37,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:05:37,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:05:37,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:05:37,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:05:37,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:05:37,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:05:37,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:05:37,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:05:37,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:05:37,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:05:37,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:05:37,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:05:37,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:05:37,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:05:37,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:05:37,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:05:37,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:05:37,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:05:37,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:05:37,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:05:37,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:05:37,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:05:37,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:05:37,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:05:37,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:05:37,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:05:37,280 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:05:37,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:05:37,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:05:37,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:05:37,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:05:37,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:05:37,281 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:05:37,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:05:37,281 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:05:37,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:05:37,282 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:05:37,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:05:37,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:05:37,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:05:37,282 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:05:37,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:05:37,282 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:05:37,282 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:05:37,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:05:37,283 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:05:37,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:05:37,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:05:37,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:05:37,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:05:37,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:05:37,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:05:37,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:05:37,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:05:37,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:05:37,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:05:37,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:05:37,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:05:37,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:05:37,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:05:37,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:05:37,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:05:37,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:05:37,285 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:05:37,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:05:37,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:05:37,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:05:37,286 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_8e707566-d70e-4bfb-b9b7-8f880995bd21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2022-12-14 15:05:37,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:05:37,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:05:37,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:05:37,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:05:37,499 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:05:37,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-12-14 15:05:40,045 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:05:40,216 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:05:40,217 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-12-14 15:05:40,225 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/data/b2437ee5d/e4e00ae83b984bb5b255c8cdc4078708/FLAGed3701df1 [2022-12-14 15:05:40,236 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/data/b2437ee5d/e4e00ae83b984bb5b255c8cdc4078708 [2022-12-14 15:05:40,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:05:40,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:05:40,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:05:40,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:05:40,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:05:40,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76dbec7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40, skipping insertion in model container [2022-12-14 15:05:40,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:05:40,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:05:40,412 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_8e707566-d70e-4bfb-b9b7-8f880995bd21/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2022-12-14 15:05:40,457 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_8e707566-d70e-4bfb-b9b7-8f880995bd21/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2022-12-14 15:05:40,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:05:40,508 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:05:40,517 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_8e707566-d70e-4bfb-b9b7-8f880995bd21/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2022-12-14 15:05:40,529 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_8e707566-d70e-4bfb-b9b7-8f880995bd21/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2022-12-14 15:05:40,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:05:40,569 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:05:40,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40 WrapperNode [2022-12-14 15:05:40,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:05:40,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:05:40,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:05:40,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:05:40,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,612 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 697 [2022-12-14 15:05:40,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:05:40,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:05:40,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:05:40,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:05:40,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:05:40,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:05:40,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:05:40,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:05:40,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:05:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:40,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:05:40,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:05:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:05:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 15:05:40,699 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 15:05:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 15:05:40,699 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 15:05:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 15:05:40,699 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 15:05:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 15:05:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 15:05:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 15:05:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 15:05:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 15:05:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 15:05:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 15:05:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 15:05:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 15:05:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 15:05:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 15:05:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 15:05:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 15:05:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 15:05:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 15:05:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 15:05:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:05:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 15:05:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 15:05:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 15:05:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 15:05:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:05:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:05:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 15:05:40,702 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 15:05:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 15:05:40,702 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 15:05:40,784 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:05:40,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:05:41,287 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:05:41,474 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:05:41,474 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 15:05:41,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:05:41 BoogieIcfgContainer [2022-12-14 15:05:41,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:05:41,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:05:41,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:05:41,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:05:41,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:05:40" (1/3) ... [2022-12-14 15:05:41,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6e7e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:05:41, skipping insertion in model container [2022-12-14 15:05:41,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (2/3) ... [2022-12-14 15:05:41,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6e7e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:05:41, skipping insertion in model container [2022-12-14 15:05:41,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:05:41" (3/3) ... [2022-12-14 15:05:41,482 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-12-14 15:05:41,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:05:41,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 15:05:41,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:05:41,538 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;@7229e939, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:05:41,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 15:05:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 154 states have internal predecessors, (223), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 15:05:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:05:41,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:41,549 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 15:05:41,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1456884927, now seen corresponding path program 1 times [2022-12-14 15:05:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:41,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522710838] [2022-12-14 15:05:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:41,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:41,767 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 15:05:41,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:41,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522710838] [2022-12-14 15:05:41,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522710838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:41,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:41,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:05:41,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306099760] [2022-12-14 15:05:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:05:41,802 INFO L87 Difference]: Start difference. First operand has 200 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 154 states have internal predecessors, (223), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) 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 15:05:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:42,095 INFO L93 Difference]: Finished difference Result 450 states and 661 transitions. [2022-12-14 15:05:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:05:42,097 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 15:05:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:42,105 INFO L225 Difference]: With dead ends: 450 [2022-12-14 15:05:42,105 INFO L226 Difference]: Without dead ends: 254 [2022-12-14 15:05:42,108 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 15:05:42,110 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 341 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:42,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 492 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:05:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-12-14 15:05:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2022-12-14 15:05:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 181 states have (on average 1.4143646408839778) internal successors, (256), 186 states have internal predecessors, (256), 44 states have call successors, (44), 22 states have call predecessors, (44), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 15:05:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 340 transitions. [2022-12-14 15:05:42,159 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 340 transitions. Word has length 45 [2022-12-14 15:05:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:42,159 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 340 transitions. [2022-12-14 15:05:42,160 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 15:05:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 340 transitions. [2022-12-14 15:05:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:05:42,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:42,161 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 15:05:42,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:05:42,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1919107746, now seen corresponding path program 1 times [2022-12-14 15:05:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:42,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542921624] [2022-12-14 15:05:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:42,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:42,242 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 15:05:42,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:42,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542921624] [2022-12-14 15:05:42,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542921624] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:42,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:42,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:05:42,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667963828] [2022-12-14 15:05:42,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:42,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:05:42,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:42,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:05:42,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:05:42,245 INFO L87 Difference]: Start difference. First operand 247 states and 340 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 15:05:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:42,727 INFO L93 Difference]: Finished difference Result 649 states and 843 transitions. [2022-12-14 15:05:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:05:42,728 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 15:05:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:42,731 INFO L225 Difference]: With dead ends: 649 [2022-12-14 15:05:42,731 INFO L226 Difference]: Without dead ends: 517 [2022-12-14 15:05:42,732 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 15:05:42,733 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 728 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:42,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 919 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:05:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-12-14 15:05:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 433. [2022-12-14 15:05:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 313 states have (on average 1.329073482428115) internal successors, (416), 319 states have internal predecessors, (416), 71 states have call successors, (71), 45 states have call predecessors, (71), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2022-12-14 15:05:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 558 transitions. [2022-12-14 15:05:42,767 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 558 transitions. Word has length 45 [2022-12-14 15:05:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:42,768 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 558 transitions. [2022-12-14 15:05:42,768 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 15:05:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 558 transitions. [2022-12-14 15:05:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 15:05:42,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:42,769 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 15:05:42,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:05:42,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash 217321988, now seen corresponding path program 1 times [2022-12-14 15:05:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:42,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888844439] [2022-12-14 15:05:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:42,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:05:42,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:42,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888844439] [2022-12-14 15:05:42,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888844439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:42,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:42,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:05:42,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315135784] [2022-12-14 15:05:42,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:42,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:05:42,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:42,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:05:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:05:42,931 INFO L87 Difference]: Start difference. First operand 433 states and 558 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 15:05:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:43,478 INFO L93 Difference]: Finished difference Result 949 states and 1174 transitions. [2022-12-14 15:05:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:05:43,479 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 15:05:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:43,481 INFO L225 Difference]: With dead ends: 949 [2022-12-14 15:05:43,482 INFO L226 Difference]: Without dead ends: 647 [2022-12-14 15:05:43,483 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 15:05:43,483 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 405 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:43,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 721 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:05:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-12-14 15:05:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 612. [2022-12-14 15:05:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 438 states have (on average 1.2968036529680365) internal successors, (568), 445 states have internal predecessors, (568), 98 states have call successors, (98), 68 states have call predecessors, (98), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2022-12-14 15:05:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 768 transitions. [2022-12-14 15:05:43,518 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 768 transitions. Word has length 46 [2022-12-14 15:05:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:43,519 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 768 transitions. [2022-12-14 15:05:43,519 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 15:05:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 768 transitions. [2022-12-14 15:05:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:05:43,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:43,520 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 15:05:43,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:05:43,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1170008372, now seen corresponding path program 1 times [2022-12-14 15:05:43,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:43,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852274369] [2022-12-14 15:05:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:43,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:43,558 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 15:05:43,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852274369] [2022-12-14 15:05:43,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852274369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:43,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:43,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:05:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016973499] [2022-12-14 15:05:43,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:43,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:05:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:05:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:05:43,560 INFO L87 Difference]: Start difference. First operand 612 states and 768 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 15:05:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:43,667 INFO L93 Difference]: Finished difference Result 1176 states and 1438 transitions. [2022-12-14 15:05:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:05:43,668 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 15:05:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:43,670 INFO L225 Difference]: With dead ends: 1176 [2022-12-14 15:05:43,670 INFO L226 Difference]: Without dead ends: 744 [2022-12-14 15:05:43,671 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 15:05:43,672 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 67 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:43,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 454 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:05:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-12-14 15:05:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 639. [2022-12-14 15:05:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 461 states have (on average 1.2863340563991323) internal successors, (593), 468 states have internal predecessors, (593), 100 states have call successors, (100), 70 states have call predecessors, (100), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2022-12-14 15:05:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 797 transitions. [2022-12-14 15:05:43,704 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 797 transitions. Word has length 47 [2022-12-14 15:05:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:43,705 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 797 transitions. [2022-12-14 15:05:43,705 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 15:05:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 797 transitions. [2022-12-14 15:05:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 15:05:43,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:43,706 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] [2022-12-14 15:05:43,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:05:43,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 187734272, now seen corresponding path program 1 times [2022-12-14 15:05:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:43,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261650421] [2022-12-14 15:05:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:43,785 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 15:05:43,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261650421] [2022-12-14 15:05:43,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261650421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:43,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:43,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:05:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128194986] [2022-12-14 15:05:43,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:43,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:05:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:05:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:05:43,787 INFO L87 Difference]: Start difference. First operand 639 states and 797 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 15:05:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:44,276 INFO L93 Difference]: Finished difference Result 1197 states and 1690 transitions. [2022-12-14 15:05:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:05:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 50 [2022-12-14 15:05:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:44,280 INFO L225 Difference]: With dead ends: 1197 [2022-12-14 15:05:44,280 INFO L226 Difference]: Without dead ends: 1077 [2022-12-14 15:05:44,281 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 15:05:44,282 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 899 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:44,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 952 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:05:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-12-14 15:05:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1064. [2022-12-14 15:05:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 801 states have (on average 1.369538077403246) internal successors, (1097), 811 states have internal predecessors, (1097), 161 states have call successors, (161), 94 states have call predecessors, (161), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2022-12-14 15:05:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1461 transitions. [2022-12-14 15:05:44,341 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1461 transitions. Word has length 50 [2022-12-14 15:05:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:44,341 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1461 transitions. [2022-12-14 15:05:44,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 15:05:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1461 transitions. [2022-12-14 15:05:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 15:05:44,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:44,342 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 15:05:44,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:05:44,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:44,343 INFO L85 PathProgramCache]: Analyzing trace with hash 746101697, now seen corresponding path program 1 times [2022-12-14 15:05:44,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:44,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058912188] [2022-12-14 15:05:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:44,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:44,375 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 15:05:44,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058912188] [2022-12-14 15:05:44,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058912188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:44,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:44,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:05:44,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348941906] [2022-12-14 15:05:44,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:44,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:05:44,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:44,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:05:44,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:05:44,376 INFO L87 Difference]: Start difference. First operand 1064 states and 1461 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 15:05:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:44,480 INFO L93 Difference]: Finished difference Result 1254 states and 1682 transitions. [2022-12-14 15:05:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:05:44,480 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 15:05:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:44,485 INFO L225 Difference]: With dead ends: 1254 [2022-12-14 15:05:44,485 INFO L226 Difference]: Without dead ends: 981 [2022-12-14 15:05:44,486 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 15:05:44,487 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 246 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:44,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 305 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:05:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-12-14 15:05:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 872. [2022-12-14 15:05:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 661 states have (on average 1.384266263237519) internal successors, (915), 669 states have internal predecessors, (915), 137 states have call successors, (137), 74 states have call predecessors, (137), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2022-12-14 15:05:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1223 transitions. [2022-12-14 15:05:44,556 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1223 transitions. Word has length 53 [2022-12-14 15:05:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:44,556 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1223 transitions. [2022-12-14 15:05:44,556 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 15:05:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1223 transitions. [2022-12-14 15:05:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 15:05:44,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:44,557 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:44,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:05:44,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 595651618, now seen corresponding path program 1 times [2022-12-14 15:05:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:44,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303260353] [2022-12-14 15:05:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:44,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:44,626 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 15:05:44,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303260353] [2022-12-14 15:05:44,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303260353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:44,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:44,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:05:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781453625] [2022-12-14 15:05:44,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:44,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:05:44,628 INFO L87 Difference]: Start difference. First operand 872 states and 1223 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 15:05:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:44,855 INFO L93 Difference]: Finished difference Result 975 states and 1339 transitions. [2022-12-14 15:05:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:05:44,855 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 15:05:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:44,861 INFO L225 Difference]: With dead ends: 975 [2022-12-14 15:05:44,861 INFO L226 Difference]: Without dead ends: 972 [2022-12-14 15:05:44,861 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 15:05:44,862 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 449 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:44,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 281 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:05:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-12-14 15:05:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 871. [2022-12-14 15:05:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 661 states have (on average 1.3797276853252647) internal successors, (912), 668 states have internal predecessors, (912), 136 states have call successors, (136), 74 states have call predecessors, (136), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2022-12-14 15:05:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1219 transitions. [2022-12-14 15:05:44,910 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1219 transitions. Word has length 54 [2022-12-14 15:05:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:44,910 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1219 transitions. [2022-12-14 15:05:44,910 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 15:05:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1219 transitions. [2022-12-14 15:05:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 15:05:44,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:44,911 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 15:05:44,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:05:44,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1284309685, now seen corresponding path program 1 times [2022-12-14 15:05:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:44,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405982143] [2022-12-14 15:05:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:44,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:45,010 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 15:05:45,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:45,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405982143] [2022-12-14 15:05:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405982143] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:45,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395010467] [2022-12-14 15:05:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:45,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:45,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:45,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:45,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:05:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:05:45,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:45,346 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 15:05:45,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:05:45,486 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 15:05:45,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395010467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:05:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508113794] [2022-12-14 15:05:45,505 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 15:05:45,505 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:05:45,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:05:45,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:05:45,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:05:48,148 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-12-14 15:05:48,165 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 141 for LOIs [2022-12-14 15:05:48,178 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-12-14 15:05:48,558 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-12-14 15:05:48,596 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-12-14 15:05:48,633 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-12-14 15:05:48,648 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-12-14 15:05:48,663 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:06:00,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [508113794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:00,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:06:00,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-12-14 15:06:00,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70609370] [2022-12-14 15:06:00,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:00,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 15:06:00,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 15:06:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 15:06:00,161 INFO L87 Difference]: Start difference. First operand 871 states and 1219 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 15:06:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:17,976 INFO L93 Difference]: Finished difference Result 1235 states and 1630 transitions. [2022-12-14 15:06:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 15:06:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-12-14 15:06:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:17,980 INFO L225 Difference]: With dead ends: 1235 [2022-12-14 15:06:17,980 INFO L226 Difference]: Without dead ends: 920 [2022-12-14 15:06:17,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 15:06:17,982 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 202 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 4144 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 4144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:17,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 2104 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 4144 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-12-14 15:06:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-12-14 15:06:18,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-12-14 15:06:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 687 states have (on average 1.3682678311499272) internal successors, (940), 694 states have internal predecessors, (940), 138 states have call successors, (138), 80 states have call predecessors, (138), 78 states have return successors, (173), 132 states have call predecessors, (173), 135 states have call successors, (173) [2022-12-14 15:06:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1251 transitions. [2022-12-14 15:06:18,055 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1251 transitions. Word has length 55 [2022-12-14 15:06:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:18,055 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1251 transitions. [2022-12-14 15:06:18,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 15:06:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1251 transitions. [2022-12-14 15:06:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 15:06:18,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:18,057 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 15:06:18,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:06:18,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:18,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2113224472, now seen corresponding path program 1 times [2022-12-14 15:06:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:18,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984405471] [2022-12-14 15:06:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:18,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:18,297 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 15:06:18,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:18,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984405471] [2022-12-14 15:06:18,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984405471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:18,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:06:18,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:06:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892609048] [2022-12-14 15:06:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:18,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:18,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:06:18,299 INFO L87 Difference]: Start difference. First operand 905 states and 1251 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 15:06:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:18,479 INFO L93 Difference]: Finished difference Result 1186 states and 1573 transitions. [2022-12-14 15:06:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:18,480 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 15:06:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:18,485 INFO L225 Difference]: With dead ends: 1186 [2022-12-14 15:06:18,485 INFO L226 Difference]: Without dead ends: 1017 [2022-12-14 15:06:18,486 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 15:06:18,486 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 42 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:18,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 493 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-12-14 15:06:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 940. [2022-12-14 15:06:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 716 states have (on average 1.3631284916201116) internal successors, (976), 723 states have internal predecessors, (976), 141 states have call successors, (141), 83 states have call predecessors, (141), 81 states have return successors, (176), 135 states have call predecessors, (176), 138 states have call successors, (176) [2022-12-14 15:06:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1293 transitions. [2022-12-14 15:06:18,563 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1293 transitions. Word has length 61 [2022-12-14 15:06:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:18,563 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1293 transitions. [2022-12-14 15:06:18,563 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 15:06:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1293 transitions. [2022-12-14 15:06:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 15:06:18,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:18,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:06:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:06:18,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash 786847523, now seen corresponding path program 1 times [2022-12-14 15:06:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:18,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263724948] [2022-12-14 15:06:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:06:18,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:18,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263724948] [2022-12-14 15:06:18,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263724948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:18,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:06:18,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:06:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697107551] [2022-12-14 15:06:18,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:18,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:06:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:06:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:06:18,684 INFO L87 Difference]: Start difference. First operand 940 states and 1293 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:06:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:19,224 INFO L93 Difference]: Finished difference Result 1403 states and 1819 transitions. [2022-12-14 15:06:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:06:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-12-14 15:06:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:19,228 INFO L225 Difference]: With dead ends: 1403 [2022-12-14 15:06:19,228 INFO L226 Difference]: Without dead ends: 1100 [2022-12-14 15:06:19,229 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 15:06:19,229 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 389 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:19,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 792 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:06:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-12-14 15:06:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1079. [2022-12-14 15:06:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 810 states have (on average 1.3320987654320988) internal successors, (1079), 817 states have internal predecessors, (1079), 165 states have call successors, (165), 104 states have call predecessors, (165), 102 states have return successors, (200), 159 states have call predecessors, (200), 162 states have call successors, (200) [2022-12-14 15:06:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1444 transitions. [2022-12-14 15:06:19,323 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1444 transitions. Word has length 63 [2022-12-14 15:06:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:19,324 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1444 transitions. [2022-12-14 15:06:19,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:06:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1444 transitions. [2022-12-14 15:06:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 15:06:19,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:19,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:06:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:06:19,325 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1294480248, now seen corresponding path program 1 times [2022-12-14 15:06:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:19,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707266428] [2022-12-14 15:06:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:06:19,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707266428] [2022-12-14 15:06:19,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707266428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144017274] [2022-12-14 15:06:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:19,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:19,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:06:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:06:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:06:19,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:06:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:06:19,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144017274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:06:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193872334] [2022-12-14 15:06:19,729 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 15:06:19,729 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:06:19,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:06:19,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:06:19,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:06:25,768 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-12-14 15:06:25,783 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 111 for LOIs [2022-12-14 15:06:25,790 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 204 for LOIs [2022-12-14 15:06:25,847 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-12-14 15:06:26,119 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-12-14 15:06:26,156 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-12-14 15:06:26,192 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-12-14 15:06:26,207 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-12-14 15:06:26,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:06:40,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27491#(and (= ~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) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:06:40,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:06:40,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:06:40,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 15:06:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318628484] [2022-12-14 15:06:40,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:06:40,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:06:40,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:06:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 15:06:40,192 INFO L87 Difference]: Start difference. First operand 1079 states and 1444 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 15:06:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:40,793 INFO L93 Difference]: Finished difference Result 2173 states and 2685 transitions. [2022-12-14 15:06:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:06:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-12-14 15:06:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:40,800 INFO L225 Difference]: With dead ends: 2173 [2022-12-14 15:06:40,800 INFO L226 Difference]: Without dead ends: 2170 [2022-12-14 15:06:40,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 15:06:40,802 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 635 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:40,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1023 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:06:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2022-12-14 15:06:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1593. [2022-12-14 15:06:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1166 states have (on average 1.2847341337907376) internal successors, (1498), 1173 states have internal predecessors, (1498), 249 states have call successors, (249), 178 states have call predecessors, (249), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2022-12-14 15:06:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2031 transitions. [2022-12-14 15:06:40,960 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2031 transitions. Word has length 64 [2022-12-14 15:06:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:40,960 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 2031 transitions. [2022-12-14 15:06:40,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 15:06:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2031 transitions. [2022-12-14 15:06:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 15:06:40,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:40,961 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:06:40,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:06:41,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:41,162 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:41,162 INFO L85 PathProgramCache]: Analyzing trace with hash 995292523, now seen corresponding path program 2 times [2022-12-14 15:06:41,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:41,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063385288] [2022-12-14 15:06:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:41,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:06:41,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063385288] [2022-12-14 15:06:41,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063385288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:41,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:06:41,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:06:41,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938959681] [2022-12-14 15:06:41,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:41,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:41,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:06:41,201 INFO L87 Difference]: Start difference. First operand 1593 states and 2031 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:06:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:41,451 INFO L93 Difference]: Finished difference Result 2345 states and 2887 transitions. [2022-12-14 15:06:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-12-14 15:06:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:41,456 INFO L225 Difference]: With dead ends: 2345 [2022-12-14 15:06:41,456 INFO L226 Difference]: Without dead ends: 1589 [2022-12-14 15:06:41,457 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 15:06:41,457 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 249 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:41,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 338 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-12-14 15:06:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1578. [2022-12-14 15:06:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1151 states have (on average 1.2754126846220677) internal successors, (1468), 1158 states have internal predecessors, (1468), 249 states have call successors, (249), 178 states have call predecessors, (249), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2022-12-14 15:06:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2001 transitions. [2022-12-14 15:06:41,604 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2001 transitions. Word has length 67 [2022-12-14 15:06:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:41,604 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 2001 transitions. [2022-12-14 15:06:41,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:06:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2001 transitions. [2022-12-14 15:06:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 15:06:41,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:41,607 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 15:06:41,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 15:06:41,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash 927374951, now seen corresponding path program 1 times [2022-12-14 15:06:41,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:41,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926466514] [2022-12-14 15:06:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:41,642 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 15:06:41,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:41,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926466514] [2022-12-14 15:06:41,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926466514] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:41,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:06:41,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:06:41,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117839927] [2022-12-14 15:06:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:06:41,644 INFO L87 Difference]: Start difference. First operand 1578 states and 2001 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 15:06:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:41,874 INFO L93 Difference]: Finished difference Result 2544 states and 3095 transitions. [2022-12-14 15:06:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:41,875 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 15:06:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:41,880 INFO L225 Difference]: With dead ends: 2544 [2022-12-14 15:06:41,880 INFO L226 Difference]: Without dead ends: 1754 [2022-12-14 15:06:41,881 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 15:06:41,882 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 37 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:41,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 484 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-12-14 15:06:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1625. [2022-12-14 15:06:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1190 states have (on average 1.2722689075630251) internal successors, (1514), 1197 states have internal predecessors, (1514), 253 states have call successors, (253), 182 states have call predecessors, (253), 180 states have return successors, (288), 247 states have call predecessors, (288), 250 states have call successors, (288) [2022-12-14 15:06:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2055 transitions. [2022-12-14 15:06:42,039 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2055 transitions. Word has length 71 [2022-12-14 15:06:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:42,039 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 2055 transitions. [2022-12-14 15:06:42,040 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 15:06:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2055 transitions. [2022-12-14 15:06:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 15:06:42,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:42,041 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 15:06:42,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:06:42,041 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:42,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1774968802, now seen corresponding path program 1 times [2022-12-14 15:06:42,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:42,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580879064] [2022-12-14 15:06:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:42,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:42,272 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 15:06:42,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:42,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580879064] [2022-12-14 15:06:42,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580879064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:42,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644167098] [2022-12-14 15:06:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:42,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:42,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:42,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:06:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:06:42,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:42,405 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 15:06:42,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:06:42,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644167098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:42,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:06:42,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 15:06:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157012483] [2022-12-14 15:06:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:42,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:06:42,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:06:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:06:42,407 INFO L87 Difference]: Start difference. First operand 1625 states and 2055 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 15:06:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:42,706 INFO L93 Difference]: Finished difference Result 2487 states and 3059 transitions. [2022-12-14 15:06:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:06:42,707 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 15:06:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:42,712 INFO L225 Difference]: With dead ends: 2487 [2022-12-14 15:06:42,712 INFO L226 Difference]: Without dead ends: 1440 [2022-12-14 15:06:42,714 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 15:06:42,714 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 243 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:42,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1023 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-12-14 15:06:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1255. [2022-12-14 15:06:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 952 states have (on average 1.305672268907563) internal successors, (1243), 959 states have internal predecessors, (1243), 182 states have call successors, (182), 121 states have call predecessors, (182), 119 states have return successors, (217), 176 states have call predecessors, (217), 179 states have call successors, (217) [2022-12-14 15:06:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1642 transitions. [2022-12-14 15:06:42,858 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1642 transitions. Word has length 102 [2022-12-14 15:06:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:42,858 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1642 transitions. [2022-12-14 15:06:42,858 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 15:06:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1642 transitions. [2022-12-14 15:06:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 15:06:42,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:42,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:42,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 15:06:43,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:06:43,061 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash 235127548, now seen corresponding path program 1 times [2022-12-14 15:06:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:43,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540425155] [2022-12-14 15:06:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:06:43,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:43,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540425155] [2022-12-14 15:06:43,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540425155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:43,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699799097] [2022-12-14 15:06:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:43,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:43,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:43,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:06:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:06:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:06:43,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:06:43,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699799097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:43,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:06:43,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:06:43,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718671338] [2022-12-14 15:06:43,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:43,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:43,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:06:43,324 INFO L87 Difference]: Start difference. First operand 1255 states and 1642 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 15:06:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:43,551 INFO L93 Difference]: Finished difference Result 2329 states and 3372 transitions. [2022-12-14 15:06:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 95 [2022-12-14 15:06:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:43,558 INFO L225 Difference]: With dead ends: 2329 [2022-12-14 15:06:43,558 INFO L226 Difference]: Without dead ends: 1784 [2022-12-14 15:06:43,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 15:06:43,560 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 242 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:43,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-12-14 15:06:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1775. [2022-12-14 15:06:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1370 states have (on average 1.3562043795620438) internal successors, (1858), 1380 states have internal predecessors, (1858), 254 states have call successors, (254), 151 states have call predecessors, (254), 149 states have return successors, (323), 245 states have call predecessors, (323), 251 states have call successors, (323) [2022-12-14 15:06:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2435 transitions. [2022-12-14 15:06:43,711 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2435 transitions. Word has length 95 [2022-12-14 15:06:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:43,711 INFO L495 AbstractCegarLoop]: Abstraction has 1775 states and 2435 transitions. [2022-12-14 15:06:43,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 15:06:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2435 transitions. [2022-12-14 15:06:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 15:06:43,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:43,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:43,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:06:43,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:06:43,915 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1826845732, now seen corresponding path program 1 times [2022-12-14 15:06:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054250389] [2022-12-14 15:06:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:06:44,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054250389] [2022-12-14 15:06:44,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054250389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840654487] [2022-12-14 15:06:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:44,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:44,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:44,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:06:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:06:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:06:44,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:06:44,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840654487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:44,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:06:44,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:06:44,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437200148] [2022-12-14 15:06:44,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:44,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:06:44,162 INFO L87 Difference]: Start difference. First operand 1775 states and 2435 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 15:06:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:44,460 INFO L93 Difference]: Finished difference Result 3874 states and 5789 transitions. [2022-12-14 15:06:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 95 [2022-12-14 15:06:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:44,468 INFO L225 Difference]: With dead ends: 3874 [2022-12-14 15:06:44,468 INFO L226 Difference]: Without dead ends: 2809 [2022-12-14 15:06:44,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 15:06:44,470 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 236 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:44,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-12-14 15:06:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2795. [2022-12-14 15:06:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2191 states have (on average 1.3957097215883159) internal successors, (3058), 2207 states have internal predecessors, (3058), 393 states have call successors, (393), 211 states have call predecessors, (393), 209 states have return successors, (526), 378 states have call predecessors, (526), 390 states have call successors, (526) [2022-12-14 15:06:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3977 transitions. [2022-12-14 15:06:44,727 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3977 transitions. Word has length 95 [2022-12-14 15:06:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:44,727 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 3977 transitions. [2022-12-14 15:06:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 15:06:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3977 transitions. [2022-12-14 15:06:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 15:06:44,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:44,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:44,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 15:06:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:44,933 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -382370628, now seen corresponding path program 1 times [2022-12-14 15:06:44,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:44,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383915530] [2022-12-14 15:06:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:06:45,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383915530] [2022-12-14 15:06:45,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383915530] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315224732] [2022-12-14 15:06:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:45,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:45,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:45,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:06:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:06:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 15:06:45,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:06:45,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315224732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:45,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:06:45,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:06:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53267123] [2022-12-14 15:06:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:06:45,192 INFO L87 Difference]: Start difference. First operand 2795 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 15:06:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:45,609 INFO L93 Difference]: Finished difference Result 6904 states and 10482 transitions. [2022-12-14 15:06:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 95 [2022-12-14 15:06:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:45,623 INFO L225 Difference]: With dead ends: 6904 [2022-12-14 15:06:45,623 INFO L226 Difference]: Without dead ends: 4819 [2022-12-14 15:06:45,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 15:06:45,628 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 245 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:45,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4819 states. [2022-12-14 15:06:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4819 to 4795. [2022-12-14 15:06:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 3803 states have (on average 1.419405732316592) internal successors, (5398), 3831 states have internal predecessors, (5398), 661 states have call successors, (661), 331 states have call predecessors, (661), 329 states have return successors, (914), 634 states have call predecessors, (914), 658 states have call successors, (914) [2022-12-14 15:06:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 6973 transitions. [2022-12-14 15:06:45,970 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 6973 transitions. Word has length 95 [2022-12-14 15:06:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:45,971 INFO L495 AbstractCegarLoop]: Abstraction has 4795 states and 6973 transitions. [2022-12-14 15:06:45,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 15:06:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 6973 transitions. [2022-12-14 15:06:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 15:06:45,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:45,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:45,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:06:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:06:46,178 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:46,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:46,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2006087716, now seen corresponding path program 1 times [2022-12-14 15:06:46,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:46,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43146260] [2022-12-14 15:06:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 15:06:46,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:46,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43146260] [2022-12-14 15:06:46,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43146260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:46,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:06:46,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:06:46,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386033566] [2022-12-14 15:06:46,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:46,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:46,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:46,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:06:46,280 INFO L87 Difference]: Start difference. First operand 4795 states and 6973 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 15:06:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:46,872 INFO L93 Difference]: Finished difference Result 9007 states and 13628 transitions. [2022-12-14 15:06:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 95 [2022-12-14 15:06:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:46,890 INFO L225 Difference]: With dead ends: 9007 [2022-12-14 15:06:46,890 INFO L226 Difference]: Without dead ends: 5723 [2022-12-14 15:06:46,898 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 15:06:46,898 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 74 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:46,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 535 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2022-12-14 15:06:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 5355. [2022-12-14 15:06:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 4331 states have (on average 1.4550912029554375) internal successors, (6302), 4359 states have internal predecessors, (6302), 677 states have call successors, (677), 347 states have call predecessors, (677), 345 states have return successors, (930), 650 states have call predecessors, (930), 674 states have call successors, (930) [2022-12-14 15:06:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 7909 transitions. [2022-12-14 15:06:47,330 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 7909 transitions. Word has length 95 [2022-12-14 15:06:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:47,330 INFO L495 AbstractCegarLoop]: Abstraction has 5355 states and 7909 transitions. [2022-12-14 15:06:47,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 15:06:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 7909 transitions. [2022-12-14 15:06:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 15:06:47,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:47,335 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 15:06:47,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 15:06:47,335 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash 918081337, now seen corresponding path program 1 times [2022-12-14 15:06:47,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:47,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764727036] [2022-12-14 15:06:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:47,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:47,428 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 15:06:47,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:47,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764727036] [2022-12-14 15:06:47,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764727036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:47,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315699863] [2022-12-14 15:06:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:47,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:47,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:47,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:06:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:47,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:06:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:47,582 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 15:06:47,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:06:47,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315699863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:47,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:06:47,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 15:06:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275878719] [2022-12-14 15:06:47,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:47,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:06:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:06:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:06:47,584 INFO L87 Difference]: Start difference. First operand 5355 states and 7909 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 15:06:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:48,165 INFO L93 Difference]: Finished difference Result 5904 states and 8534 transitions. [2022-12-14 15:06:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:06:48,165 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 15:06:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:48,178 INFO L225 Difference]: With dead ends: 5904 [2022-12-14 15:06:48,178 INFO L226 Difference]: Without dead ends: 5311 [2022-12-14 15:06:48,180 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 15:06:48,181 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 66 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:48,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1062 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2022-12-14 15:06:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 5219. [2022-12-14 15:06:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5219 states, 4231 states have (on average 1.4618293547624674) internal successors, (6185), 4259 states have internal predecessors, (6185), 658 states have call successors, (658), 330 states have call predecessors, (658), 328 states have return successors, (911), 631 states have call predecessors, (911), 655 states have call successors, (911) [2022-12-14 15:06:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5219 states to 5219 states and 7754 transitions. [2022-12-14 15:06:48,535 INFO L78 Accepts]: Start accepts. Automaton has 5219 states and 7754 transitions. Word has length 112 [2022-12-14 15:06:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:48,535 INFO L495 AbstractCegarLoop]: Abstraction has 5219 states and 7754 transitions. [2022-12-14 15:06:48,535 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 15:06:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5219 states and 7754 transitions. [2022-12-14 15:06:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 15:06:48,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:48,539 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 15:06:48,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:06:48,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:48,740 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash -726357934, now seen corresponding path program 1 times [2022-12-14 15:06:48,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:48,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280635783] [2022-12-14 15:06:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:48,826 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 15:06:48,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:48,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280635783] [2022-12-14 15:06:48,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280635783] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:48,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134014461] [2022-12-14 15:06:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:48,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:48,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:48,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:06:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:06:48,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:48,963 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 15:06:48,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:06:48,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134014461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:48,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:06:48,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 15:06:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964847941] [2022-12-14 15:06:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:48,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:06:48,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:06:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:06:48,964 INFO L87 Difference]: Start difference. First operand 5219 states and 7754 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 15:06:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:49,436 INFO L93 Difference]: Finished difference Result 5968 states and 8599 transitions. [2022-12-14 15:06:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:06:49,437 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 15:06:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:49,449 INFO L225 Difference]: With dead ends: 5968 [2022-12-14 15:06:49,449 INFO L226 Difference]: Without dead ends: 5511 [2022-12-14 15:06:49,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:06:49,452 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 229 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:49,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1118 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:06:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2022-12-14 15:06:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5477. [2022-12-14 15:06:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 4393 states have (on average 1.4488959708627362) internal successors, (6365), 4427 states have internal predecessors, (6365), 706 states have call successors, (706), 372 states have call predecessors, (706), 376 states have return successors, (971), 679 states have call predecessors, (971), 703 states have call successors, (971) [2022-12-14 15:06:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 8042 transitions. [2022-12-14 15:06:49,920 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 8042 transitions. Word has length 113 [2022-12-14 15:06:49,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:49,921 INFO L495 AbstractCegarLoop]: Abstraction has 5477 states and 8042 transitions. [2022-12-14 15:06:49,921 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 15:06:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 8042 transitions. [2022-12-14 15:06:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 15:06:49,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:49,925 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 15:06:49,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:06:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:50,126 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2023840410, now seen corresponding path program 1 times [2022-12-14 15:06:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:50,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301219012] [2022-12-14 15:06:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:50,581 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 15:06:50,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301219012] [2022-12-14 15:06:50,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301219012] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899321526] [2022-12-14 15:06:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:50,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:50,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:50,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:06:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:50,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 15:06:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:51,184 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 15:06:51,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:06:52,273 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 15:06:52,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899321526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:06:52,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827484147] [2022-12-14 15:06:52,275 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 15:06:52,275 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:06:52,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:06:52,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:06:52,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:07:25,131 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-12-14 15:07:25,458 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 203 for LOIs [2022-12-14 15:07:25,508 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 98 for LOIs [2022-12-14 15:07:25,517 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-12-14 15:07:27,067 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-12-14 15:07:27,261 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 98 for LOIs [2022-12-14 15:07:27,433 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-12-14 15:07:27,763 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-12-14 15:07:28,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:08:03,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137706#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 0 ~t5_i~0) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:08:03,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:08:03,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:08:03,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 15:08:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521838637] [2022-12-14 15:08:03,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:08:03,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:08:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:08:03,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10572, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 15:08:03,291 INFO L87 Difference]: Start difference. First operand 5477 states and 8042 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 15:08:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:18,813 INFO L93 Difference]: Finished difference Result 7988 states and 10958 transitions. [2022-12-14 15:08:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 15:08:18,814 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 15:08:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:18,828 INFO L225 Difference]: With dead ends: 7988 [2022-12-14 15:08:18,828 INFO L226 Difference]: Without dead ends: 7273 [2022-12-14 15:08:18,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43797 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=10057, Invalid=99173, Unknown=0, NotChecked=0, Total=109230 [2022-12-14 15:08:18,841 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 4254 mSDsluCounter, 2747 mSDsCounter, 0 mSdLazyCounter, 7033 mSolverCounterSat, 2189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4255 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 9222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2189 IncrementalHoareTripleChecker+Valid, 7033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:18,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4255 Valid, 2959 Invalid, 9222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2189 Valid, 7033 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 15:08:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2022-12-14 15:08:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 5753. [2022-12-14 15:08:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 4577 states have (on average 1.436748962202316) internal successors, (6576), 4613 states have internal predecessors, (6576), 751 states have call successors, (751), 409 states have call predecessors, (751), 423 states have return successors, (1028), 732 states have call predecessors, (1028), 748 states have call successors, (1028) [2022-12-14 15:08:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 8355 transitions. [2022-12-14 15:08:19,428 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 8355 transitions. Word has length 114 [2022-12-14 15:08:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:19,428 INFO L495 AbstractCegarLoop]: Abstraction has 5753 states and 8355 transitions. [2022-12-14 15:08:19,428 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 15:08:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 8355 transitions. [2022-12-14 15:08:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:08:19,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:19,435 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 15:08:19,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 15:08:19,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 15:08:19,636 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash 188293135, now seen corresponding path program 1 times [2022-12-14 15:08:19,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:19,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919411082] [2022-12-14 15:08:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:19,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:19,827 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 15:08:19,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919411082] [2022-12-14 15:08:19,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919411082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:19,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403128719] [2022-12-14 15:08:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:19,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:19,829 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:19,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:08:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:08:19,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:19,984 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 15:08:19,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:08:20,111 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 15:08:20,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403128719] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:20,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:08:20,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 15:08:20,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131205758] [2022-12-14 15:08:20,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:20,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:08:20,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:08:20,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:08:20,113 INFO L87 Difference]: Start difference. First operand 5753 states and 8355 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 15:08:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:21,473 INFO L93 Difference]: Finished difference Result 7077 states and 9903 transitions. [2022-12-14 15:08:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:08:21,473 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 15:08:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:21,485 INFO L225 Difference]: With dead ends: 7077 [2022-12-14 15:08:21,485 INFO L226 Difference]: Without dead ends: 6086 [2022-12-14 15:08:21,488 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 15:08:21,488 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 379 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:21,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 616 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:08:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2022-12-14 15:08:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5833. [2022-12-14 15:08:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5833 states, 4622 states have (on average 1.4337948939852878) internal successors, (6627), 4661 states have internal predecessors, (6627), 770 states have call successors, (770), 418 states have call predecessors, (770), 439 states have return successors, (1068), 755 states have call predecessors, (1068), 767 states have call successors, (1068) [2022-12-14 15:08:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5833 states to 5833 states and 8465 transitions. [2022-12-14 15:08:22,094 INFO L78 Accepts]: Start accepts. Automaton has 5833 states and 8465 transitions. Word has length 115 [2022-12-14 15:08:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:22,094 INFO L495 AbstractCegarLoop]: Abstraction has 5833 states and 8465 transitions. [2022-12-14 15:08:22,094 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 15:08:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5833 states and 8465 transitions. [2022-12-14 15:08:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 15:08:22,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:22,100 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 15:08:22,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 15:08:22,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 15:08:22,301 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash -414880786, now seen corresponding path program 1 times [2022-12-14 15:08:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:22,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444151668] [2022-12-14 15:08:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:22,812 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 15:08:22,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:22,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444151668] [2022-12-14 15:08:22,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444151668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:22,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461644207] [2022-12-14 15:08:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:22,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:22,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:22,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:08:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:22,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 15:08:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:23,482 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 15:08:23,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:08:24,478 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 15:08:24,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461644207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:08:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406264427] [2022-12-14 15:08:24,481 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 15:08:24,481 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:08:24,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:08:24,482 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:08:24,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:08:34,456 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-12-14 15:08:34,957 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 201 for LOIs [2022-12-14 15:08:35,005 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 100 for LOIs [2022-12-14 15:08:35,014 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-12-14 15:08:36,559 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-12-14 15:08:36,759 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 100 for LOIs [2022-12-14 15:08:36,941 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-12-14 15:08:37,345 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-12-14 15:08:37,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:09:07,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177963#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:09:07,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:09:07,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:09:07,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 15:09:07,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235262428] [2022-12-14 15:09:07,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:09:07,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 15:09:07,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 15:09:07,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=11482, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 15:09:07,906 INFO L87 Difference]: Start difference. First operand 5833 states and 8465 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 15:09:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:20,433 INFO L93 Difference]: Finished difference Result 8117 states and 11167 transitions. [2022-12-14 15:09:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 15:09:20,433 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 15:09:20,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:20,445 INFO L225 Difference]: With dead ends: 8117 [2022-12-14 15:09:20,445 INFO L226 Difference]: Without dead ends: 7046 [2022-12-14 15:09:20,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26800 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=6748, Invalid=62158, Unknown=0, NotChecked=0, Total=68906 [2022-12-14 15:09:20,451 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5059 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 8890 mSolverCounterSat, 3676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5059 SdHoareTripleChecker+Valid, 2983 SdHoareTripleChecker+Invalid, 12566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3676 IncrementalHoareTripleChecker+Valid, 8890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:20,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5059 Valid, 2983 Invalid, 12566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3676 Valid, 8890 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 15:09:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2022-12-14 15:09:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 5649. [2022-12-14 15:09:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5649 states, 4510 states have (on average 1.441019955654102) internal successors, (6499), 4548 states have internal predecessors, (6499), 730 states have call successors, (730), 386 states have call predecessors, (730), 407 states have return successors, (1018), 716 states have call predecessors, (1018), 727 states have call successors, (1018) [2022-12-14 15:09:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8247 transitions. [2022-12-14 15:09:21,079 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8247 transitions. Word has length 124 [2022-12-14 15:09:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:21,080 INFO L495 AbstractCegarLoop]: Abstraction has 5649 states and 8247 transitions. [2022-12-14 15:09:21,080 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 15:09:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8247 transitions. [2022-12-14 15:09:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 15:09:21,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:21,085 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 15:09:21,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:09:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:21,286 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1782039149, now seen corresponding path program 1 times [2022-12-14 15:09:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:21,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128851682] [2022-12-14 15:09:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:21,379 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 15:09:21,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:21,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128851682] [2022-12-14 15:09:21,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128851682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:21,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926542164] [2022-12-14 15:09:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:21,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:21,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:21,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:21,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:09:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:21,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:09:21,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:21,535 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 15:09:21,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:09:21,660 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 15:09:21,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926542164] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:21,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:09:21,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 15:09:21,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450380014] [2022-12-14 15:09:21,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:21,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:09:21,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:09:21,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:09:21,662 INFO L87 Difference]: Start difference. First operand 5649 states and 8247 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 15:09:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:22,820 INFO L93 Difference]: Finished difference Result 6304 states and 8988 transitions. [2022-12-14 15:09:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:09:22,820 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 15:09:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:22,829 INFO L225 Difference]: With dead ends: 6304 [2022-12-14 15:09:22,829 INFO L226 Difference]: Without dead ends: 5417 [2022-12-14 15:09:22,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 15:09:22,831 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 558 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:22,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 474 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:09:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2022-12-14 15:09:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 5380. [2022-12-14 15:09:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 4311 states have (on average 1.4507074924611458) internal successors, (6254), 4349 states have internal predecessors, (6254), 694 states have call successors, (694), 356 states have call predecessors, (694), 373 states have return successors, (977), 676 states have call predecessors, (977), 691 states have call successors, (977) [2022-12-14 15:09:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 7925 transitions. [2022-12-14 15:09:23,449 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 7925 transitions. Word has length 125 [2022-12-14 15:09:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:23,449 INFO L495 AbstractCegarLoop]: Abstraction has 5380 states and 7925 transitions. [2022-12-14 15:09:23,449 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 15:09:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 7925 transitions. [2022-12-14 15:09:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 15:09:23,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:23,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:09:23,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:09:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:23,656 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 272597198, now seen corresponding path program 1 times [2022-12-14 15:09:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:23,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679937722] [2022-12-14 15:09:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 15:09:23,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679937722] [2022-12-14 15:09:23,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679937722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:23,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:09:23,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:09:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296088405] [2022-12-14 15:09:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:23,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:09:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:23,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:09:23,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:09:23,696 INFO L87 Difference]: Start difference. First operand 5380 states and 7925 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:09:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:24,802 INFO L93 Difference]: Finished difference Result 14493 states and 22298 transitions. [2022-12-14 15:09:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:09:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-12-14 15:09:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:24,818 INFO L225 Difference]: With dead ends: 14493 [2022-12-14 15:09:24,818 INFO L226 Difference]: Without dead ends: 9848 [2022-12-14 15:09:24,827 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 15:09:24,827 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 238 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:24,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 385 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:09:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2022-12-14 15:09:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9788. [2022-12-14 15:09:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9788 states, 7931 states have (on average 1.4593367797251293) internal successors, (11574), 7993 states have internal predecessors, (11574), 1226 states have call successors, (1226), 612 states have call predecessors, (1226), 629 states have return successors, (1733), 1184 states have call predecessors, (1733), 1223 states have call successors, (1733) [2022-12-14 15:09:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9788 states to 9788 states and 14533 transitions. [2022-12-14 15:09:25,894 INFO L78 Accepts]: Start accepts. Automaton has 9788 states and 14533 transitions. Word has length 127 [2022-12-14 15:09:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:25,894 INFO L495 AbstractCegarLoop]: Abstraction has 9788 states and 14533 transitions. [2022-12-14 15:09:25,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:09:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 9788 states and 14533 transitions. [2022-12-14 15:09:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 15:09:25,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:25,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:09:25,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 15:09:25,906 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1420344722, now seen corresponding path program 1 times [2022-12-14 15:09:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:25,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914022675] [2022-12-14 15:09:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:25,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 15:09:25,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:25,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914022675] [2022-12-14 15:09:25,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914022675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:25,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:09:25,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:09:25,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775622445] [2022-12-14 15:09:25,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:25,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:09:25,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:09:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:09:25,942 INFO L87 Difference]: Start difference. First operand 9788 states and 14533 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:09:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:28,224 INFO L93 Difference]: Finished difference Result 27541 states and 42206 transitions. [2022-12-14 15:09:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:09:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-12-14 15:09:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:28,259 INFO L225 Difference]: With dead ends: 27541 [2022-12-14 15:09:28,259 INFO L226 Difference]: Without dead ends: 18488 [2022-12-14 15:09:28,280 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 15:09:28,281 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 241 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:28,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 385 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:09:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18488 states. [2022-12-14 15:09:30,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18488 to 18372. [2022-12-14 15:09:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18372 states, 14979 states have (on average 1.4573736564523667) internal successors, (21830), 15089 states have internal predecessors, (21830), 2250 states have call successors, (2250), 1124 states have call predecessors, (2250), 1141 states have return successors, (3173), 2160 states have call predecessors, (3173), 2247 states have call successors, (3173) [2022-12-14 15:09:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18372 states to 18372 states and 27253 transitions. [2022-12-14 15:09:30,918 INFO L78 Accepts]: Start accepts. Automaton has 18372 states and 27253 transitions. Word has length 127 [2022-12-14 15:09:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:30,919 INFO L495 AbstractCegarLoop]: Abstraction has 18372 states and 27253 transitions. [2022-12-14 15:09:30,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:09:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 18372 states and 27253 transitions. [2022-12-14 15:09:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:09:30,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:30,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:09:30,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 15:09:30,947 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash -358435372, now seen corresponding path program 1 times [2022-12-14 15:09:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:30,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517763568] [2022-12-14 15:09:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:30,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:09:31,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:31,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517763568] [2022-12-14 15:09:31,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517763568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:31,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344681455] [2022-12-14 15:09:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:31,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:31,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:09:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:09:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:09:31,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:09:31,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344681455] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:31,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:09:31,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:09:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625799071] [2022-12-14 15:09:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:09:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:09:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:09:31,251 INFO L87 Difference]: Start difference. First operand 18372 states and 27253 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:09:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:34,495 INFO L93 Difference]: Finished difference Result 33473 states and 49724 transitions. [2022-12-14 15:09:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:09:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-12-14 15:09:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:34,549 INFO L225 Difference]: With dead ends: 33473 [2022-12-14 15:09:34,549 INFO L226 Difference]: Without dead ends: 23053 [2022-12-14 15:09:34,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:09:34,581 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 247 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:34,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 287 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:09:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23053 states. [2022-12-14 15:09:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23053 to 23053. [2022-12-14 15:09:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23053 states, 19185 states have (on average 1.4121449048735992) internal successors, (27092), 19295 states have internal predecessors, (27092), 2407 states have call successors, (2407), 1441 states have call predecessors, (2407), 1459 states have return successors, (3456), 2318 states have call predecessors, (3456), 2404 states have call successors, (3456) [2022-12-14 15:09:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23053 states to 23053 states and 32955 transitions. [2022-12-14 15:09:37,318 INFO L78 Accepts]: Start accepts. Automaton has 23053 states and 32955 transitions. Word has length 146 [2022-12-14 15:09:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:37,318 INFO L495 AbstractCegarLoop]: Abstraction has 23053 states and 32955 transitions. [2022-12-14 15:09:37,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:09:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 23053 states and 32955 transitions. [2022-12-14 15:09:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:09:37,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:37,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:09:37,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:09:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 15:09:37,558 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:37,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2123251981, now seen corresponding path program 2 times [2022-12-14 15:09:37,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:37,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923536785] [2022-12-14 15:09:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 15:09:37,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923536785] [2022-12-14 15:09:37,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923536785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252823559] [2022-12-14 15:09:37,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:09:37,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:37,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:37,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:09:37,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:09:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:09:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:09:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:09:37,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:09:37,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252823559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:37,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:09:37,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:09:37,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662984785] [2022-12-14 15:09:37,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:37,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:09:37,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:37,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:09:37,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:09:37,829 INFO L87 Difference]: Start difference. First operand 23053 states and 32955 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:09:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:41,128 INFO L93 Difference]: Finished difference Result 45788 states and 67298 transitions. [2022-12-14 15:09:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:09:41,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-12-14 15:09:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:41,203 INFO L225 Difference]: With dead ends: 45788 [2022-12-14 15:09:41,203 INFO L226 Difference]: Without dead ends: 32537 [2022-12-14 15:09:41,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:09:41,234 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 141 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:41,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 578 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:09:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32537 states. [2022-12-14 15:09:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32537 to 32053. [2022-12-14 15:09:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32053 states, 26750 states have (on average 1.4098317757009347) internal successors, (37713), 26892 states have internal predecessors, (37713), 3301 states have call successors, (3301), 1983 states have call predecessors, (3301), 2000 states have return successors, (5273), 3179 states have call predecessors, (5273), 3298 states have call successors, (5273) [2022-12-14 15:09:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32053 states to 32053 states and 46287 transitions. [2022-12-14 15:09:44,841 INFO L78 Accepts]: Start accepts. Automaton has 32053 states and 46287 transitions. Word has length 146 [2022-12-14 15:09:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:44,842 INFO L495 AbstractCegarLoop]: Abstraction has 32053 states and 46287 transitions. [2022-12-14 15:09:44,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:09:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32053 states and 46287 transitions. [2022-12-14 15:09:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:09:44,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:44,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:09:44,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 15:09:45,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 15:09:45,074 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:45,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:45,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1704431435, now seen corresponding path program 1 times [2022-12-14 15:09:45,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:45,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681758748] [2022-12-14 15:09:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:09:45,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681758748] [2022-12-14 15:09:45,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681758748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766153240] [2022-12-14 15:09:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:45,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:45,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:45,232 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:45,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:09:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:09:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 15:09:45,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:09:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766153240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:45,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:09:45,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:09:45,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480070276] [2022-12-14 15:09:45,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:45,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:09:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:09:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:09:45,364 INFO L87 Difference]: Start difference. First operand 32053 states and 46287 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:09:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:50,651 INFO L93 Difference]: Finished difference Result 74501 states and 110139 transitions. [2022-12-14 15:09:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:09:50,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2022-12-14 15:09:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:50,763 INFO L225 Difference]: With dead ends: 74501 [2022-12-14 15:09:50,763 INFO L226 Difference]: Without dead ends: 43184 [2022-12-14 15:09:50,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:09:50,823 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 83 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:50,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 468 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:09:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43184 states. [2022-12-14 15:09:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43184 to 36125. [2022-12-14 15:09:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36125 states, 30562 states have (on average 1.4435246384398928) internal successors, (44117), 30705 states have internal predecessors, (44117), 3431 states have call successors, (3431), 2113 states have call predecessors, (3431), 2130 states have return successors, (5403), 3308 states have call predecessors, (5403), 3428 states have call successors, (5403) [2022-12-14 15:09:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36125 states to 36125 states and 52951 transitions. [2022-12-14 15:09:55,056 INFO L78 Accepts]: Start accepts. Automaton has 36125 states and 52951 transitions. Word has length 147 [2022-12-14 15:09:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:55,057 INFO L495 AbstractCegarLoop]: Abstraction has 36125 states and 52951 transitions. [2022-12-14 15:09:55,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:09:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 36125 states and 52951 transitions. [2022-12-14 15:09:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:09:55,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:55,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:09:55,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 15:09:55,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 15:09:55,290 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:55,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1408907761, now seen corresponding path program 1 times [2022-12-14 15:09:55,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:55,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428722568] [2022-12-14 15:09:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:55,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 15:09:55,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428722568] [2022-12-14 15:09:55,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428722568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017862812] [2022-12-14 15:09:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:55,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:55,385 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:55,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:09:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:55,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:09:55,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:09:55,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:09:55,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017862812] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:55,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:09:55,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 15:09:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325434931] [2022-12-14 15:09:55,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:55,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:09:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:09:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:09:55,524 INFO L87 Difference]: Start difference. First operand 36125 states and 52951 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:10:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:10:01,105 INFO L93 Difference]: Finished difference Result 68592 states and 102028 transitions. [2022-12-14 15:10:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:10:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 147 [2022-12-14 15:10:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:10:01,221 INFO L225 Difference]: With dead ends: 68592 [2022-12-14 15:10:01,221 INFO L226 Difference]: Without dead ends: 50556 [2022-12-14 15:10:01,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:10:01,258 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 119 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:10:01,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 578 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:10:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50556 states. [2022-12-14 15:10:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50556 to 42605. [2022-12-14 15:10:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42605 states, 36594 states have (on average 1.480597912226048) internal successors, (54181), 36737 states have internal predecessors, (54181), 3655 states have call successors, (3655), 2337 states have call predecessors, (3655), 2354 states have return successors, (5627), 3532 states have call predecessors, (5627), 3652 states have call successors, (5627) [2022-12-14 15:10:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42605 states to 42605 states and 63463 transitions. [2022-12-14 15:10:06,240 INFO L78 Accepts]: Start accepts. Automaton has 42605 states and 63463 transitions. Word has length 147 [2022-12-14 15:10:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:10:06,240 INFO L495 AbstractCegarLoop]: Abstraction has 42605 states and 63463 transitions. [2022-12-14 15:10:06,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:10:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 42605 states and 63463 transitions. [2022-12-14 15:10:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 15:10:06,274 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:10:06,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:10:06,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 15:10:06,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:06,475 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:10:06,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:10:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash -73418036, now seen corresponding path program 1 times [2022-12-14 15:10:06,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:10:06,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843484528] [2022-12-14 15:10:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:06,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:10:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:10:06,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:10:06,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843484528] [2022-12-14 15:10:06,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843484528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:10:06,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313435059] [2022-12-14 15:10:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:06,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:06,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:10:06,668 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:10:06,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 15:10:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:06,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:10:06,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:10:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:10:06,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:10:06,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313435059] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:10:06,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:10:06,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 15:10:06,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956947220] [2022-12-14 15:10:06,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:10:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:10:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:10:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:10:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:10:06,800 INFO L87 Difference]: Start difference. First operand 42605 states and 63463 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:10:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:10:15,515 INFO L93 Difference]: Finished difference Result 125761 states and 187754 transitions. [2022-12-14 15:10:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:10:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 148 [2022-12-14 15:10:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:10:15,721 INFO L225 Difference]: With dead ends: 125761 [2022-12-14 15:10:15,721 INFO L226 Difference]: Without dead ends: 83892 [2022-12-14 15:10:15,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:10:15,781 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 264 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:10:15,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 905 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:10:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83892 states. [2022-12-14 15:10:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83892 to 83820. [2022-12-14 15:10:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83820 states, 72045 states have (on average 1.46397390519814) internal successors, (105472), 72381 states have internal predecessors, (105472), 7121 states have call successors, (7121), 4571 states have call predecessors, (7121), 4652 states have return successors, (11773), 6869 states have call predecessors, (11773), 7118 states have call successors, (11773) [2022-12-14 15:10:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83820 states to 83820 states and 124366 transitions. [2022-12-14 15:10:25,020 INFO L78 Accepts]: Start accepts. Automaton has 83820 states and 124366 transitions. Word has length 148 [2022-12-14 15:10:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:10:25,020 INFO L495 AbstractCegarLoop]: Abstraction has 83820 states and 124366 transitions. [2022-12-14 15:10:25,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:10:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 83820 states and 124366 transitions. [2022-12-14 15:10:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 15:10:25,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:10:25,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:10:25,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 15:10:25,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:25,297 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:10:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:10:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2088527937, now seen corresponding path program 1 times [2022-12-14 15:10:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:10:25,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753731905] [2022-12-14 15:10:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:25,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:10:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:10:25,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:10:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753731905] [2022-12-14 15:10:25,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753731905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:10:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838685374] [2022-12-14 15:10:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:25,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:25,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:10:25,454 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:10:25,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 15:10:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:10:25,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:10:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 15:10:25,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:10:25,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838685374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:10:25,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:10:25,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:10:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744637587] [2022-12-14 15:10:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:10:25,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:10:25,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:10:25,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:10:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:10:25,624 INFO L87 Difference]: Start difference. First operand 83820 states and 124366 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:10:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:10:40,280 INFO L93 Difference]: Finished difference Result 206088 states and 305882 transitions. [2022-12-14 15:10:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:10:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2022-12-14 15:10:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:10:40,611 INFO L225 Difference]: With dead ends: 206088 [2022-12-14 15:10:40,612 INFO L226 Difference]: Without dead ends: 123004 [2022-12-14 15:10:40,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:10:40,747 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 557 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:10:40,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 557 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:10:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123004 states. [2022-12-14 15:10:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123004 to 123000. [2022-12-14 15:10:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123000 states, 105585 states have (on average 1.4505469526921437) internal successors, (153156), 106081 states have internal predecessors, (153156), 10501 states have call successors, (10501), 6799 states have call predecessors, (10501), 6912 states have return successors, (17330), 10121 states have call predecessors, (17330), 10498 states have call successors, (17330) [2022-12-14 15:10:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123000 states to 123000 states and 180987 transitions. [2022-12-14 15:10:55,721 INFO L78 Accepts]: Start accepts. Automaton has 123000 states and 180987 transitions. Word has length 148 [2022-12-14 15:10:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:10:55,722 INFO L495 AbstractCegarLoop]: Abstraction has 123000 states and 180987 transitions. [2022-12-14 15:10:55,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:10:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 123000 states and 180987 transitions. [2022-12-14 15:10:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:10:55,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:10:55,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:10:55,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 15:10:56,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:56,040 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:10:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:10:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1856851509, now seen corresponding path program 1 times [2022-12-14 15:10:56,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:10:56,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312251585] [2022-12-14 15:10:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:56,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:10:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:10:56,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:10:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312251585] [2022-12-14 15:10:56,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312251585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:10:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354528531] [2022-12-14 15:10:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:56,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:56,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:10:56,197 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:10:56,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 15:10:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:10:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:10:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 15:10:56,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:10:56,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354528531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:10:56,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:10:56,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:10:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429398340] [2022-12-14 15:10:56,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:10:56,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:10:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:10:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:10:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:10:56,375 INFO L87 Difference]: Start difference. First operand 123000 states and 180987 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:11:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:19,380 INFO L93 Difference]: Finished difference Result 303356 states and 446529 transitions. [2022-12-14 15:11:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:11:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 150 [2022-12-14 15:11:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:19,864 INFO L225 Difference]: With dead ends: 303356 [2022-12-14 15:11:19,865 INFO L226 Difference]: Without dead ends: 181092 [2022-12-14 15:11:20,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:11:20,067 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 567 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:20,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 556 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:11:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181092 states. [2022-12-14 15:11:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181092 to 181088. [2022-12-14 15:11:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181088 states, 155281 states have (on average 1.4380381373123563) internal successors, (223300), 156017 states have internal predecessors, (223300), 15509 states have call successors, (15509), 10135 states have call predecessors, (15509), 10296 states have return successors, (25532), 14937 states have call predecessors, (25532), 15506 states have call successors, (25532) [2022-12-14 15:11:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181088 states to 181088 states and 264341 transitions. [2022-12-14 15:11:42,109 INFO L78 Accepts]: Start accepts. Automaton has 181088 states and 264341 transitions. Word has length 150 [2022-12-14 15:11:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:42,110 INFO L495 AbstractCegarLoop]: Abstraction has 181088 states and 264341 transitions. [2022-12-14 15:11:42,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:11:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 181088 states and 264341 transitions. [2022-12-14 15:11:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 15:11:42,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:42,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:42,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 15:11:42,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 15:11:42,484 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash -633906258, now seen corresponding path program 1 times [2022-12-14 15:11:42,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:42,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714470141] [2022-12-14 15:11:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 15:11:42,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:42,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714470141] [2022-12-14 15:11:42,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714470141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:42,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471218106] [2022-12-14 15:11:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:42,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:42,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:42,551 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:42,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 15:11:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:11:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:11:42,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:11:42,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471218106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:11:42,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:11:42,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 15:11:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412849715] [2022-12-14 15:11:42,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:11:42,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:11:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:11:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:11:42,677 INFO L87 Difference]: Start difference. First operand 181088 states and 264341 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:12:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:12:10,122 INFO L93 Difference]: Finished difference Result 350280 states and 517063 transitions. [2022-12-14 15:12:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:12:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 149 [2022-12-14 15:12:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:12:10,799 INFO L225 Difference]: With dead ends: 350280 [2022-12-14 15:12:10,799 INFO L226 Difference]: Without dead ends: 229324 [2022-12-14 15:12:11,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:12:11,034 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 112 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:12:11,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 572 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:12:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229324 states. [2022-12-14 15:12:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229324 to 207176. [2022-12-14 15:12:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207176 states, 179353 states have (on average 1.459802735387755) internal successors, (261820), 180089 states have internal predecessors, (261820), 16517 states have call successors, (16517), 11143 states have call predecessors, (16517), 11304 states have return successors, (26540), 15945 states have call predecessors, (26540), 16514 states have call successors, (26540) [2022-12-14 15:12:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207176 states to 207176 states and 304877 transitions. [2022-12-14 15:12:37,312 INFO L78 Accepts]: Start accepts. Automaton has 207176 states and 304877 transitions. Word has length 149 [2022-12-14 15:12:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:12:37,313 INFO L495 AbstractCegarLoop]: Abstraction has 207176 states and 304877 transitions. [2022-12-14 15:12:37,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:12:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 207176 states and 304877 transitions. [2022-12-14 15:12:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:12:37,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:12:37,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:12:37,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 15:12:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 15:12:37,718 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:12:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:12:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1084399845, now seen corresponding path program 1 times [2022-12-14 15:12:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:12:37,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526497302] [2022-12-14 15:12:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:12:37,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:12:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:12:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:12:37,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:12:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526497302] [2022-12-14 15:12:37,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526497302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:12:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185453891] [2022-12-14 15:12:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:12:37,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:12:37,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:12:37,848 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:12:37,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 15:12:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:12:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:12:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:12:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:12:37,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:12:37,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185453891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:12:37,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:12:37,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:12:37,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884201847] [2022-12-14 15:12:37,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:12:37,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:12:37,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:12:37,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:12:37,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:12:37,992 INFO L87 Difference]: Start difference. First operand 207176 states and 304877 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:13:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:03,461 INFO L93 Difference]: Finished difference Result 354560 states and 535839 transitions. [2022-12-14 15:13:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:13:03,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 150 [2022-12-14 15:13:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:04,042 INFO L225 Difference]: With dead ends: 354560 [2022-12-14 15:13:04,043 INFO L226 Difference]: Without dead ends: 207516 [2022-12-14 15:13:04,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:13:04,308 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 143 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:04,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 564 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:13:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207516 states. [2022-12-14 15:13:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207516 to 205832. [2022-12-14 15:13:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205832 states, 178009 states have (on average 1.4438595801335887) internal successors, (257020), 178745 states have internal predecessors, (257020), 16517 states have call successors, (16517), 11143 states have call predecessors, (16517), 11304 states have return successors, (26540), 15945 states have call predecessors, (26540), 16514 states have call successors, (26540) [2022-12-14 15:13:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205832 states to 205832 states and 300077 transitions. [2022-12-14 15:13:29,828 INFO L78 Accepts]: Start accepts. Automaton has 205832 states and 300077 transitions. Word has length 150 [2022-12-14 15:13:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:29,828 INFO L495 AbstractCegarLoop]: Abstraction has 205832 states and 300077 transitions. [2022-12-14 15:13:29,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:13:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 205832 states and 300077 transitions. [2022-12-14 15:13:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:13:30,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:30,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:13:30,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 15:13:30,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 15:13:30,222 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:30,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1164290087, now seen corresponding path program 1 times [2022-12-14 15:13:30,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:30,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682179990] [2022-12-14 15:13:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:13:30,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:30,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682179990] [2022-12-14 15:13:30,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682179990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:30,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129605568] [2022-12-14 15:13:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:30,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:30,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:30,356 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:30,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 15:13:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:13:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 15:13:30,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:13:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129605568] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:30,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:13:30,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:13:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684168271] [2022-12-14 15:13:30,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:30,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:13:30,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:30,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:13:30,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:13:30,544 INFO L87 Difference]: Start difference. First operand 205832 states and 300077 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:13:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:48,565 INFO L93 Difference]: Finished difference Result 344400 states and 499894 transitions. [2022-12-14 15:13:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:13:48,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 150 [2022-12-14 15:13:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:48,926 INFO L225 Difference]: With dead ends: 344400 [2022-12-14 15:13:48,926 INFO L226 Difference]: Without dead ends: 139304 [2022-12-14 15:13:49,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:13:49,216 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 714 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:49,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 509 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:13:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139304 states. [2022-12-14 15:14:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139304 to 136191. [2022-12-14 15:14:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136191 states, 117955 states have (on average 1.4393285575007417) internal successors, (169776), 118474 states have internal predecessors, (169776), 10723 states have call successors, (10723), 7206 states have call predecessors, (10723), 7511 states have return successors, (15866), 10512 states have call predecessors, (15866), 10720 states have call successors, (15866) [2022-12-14 15:14:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136191 states to 136191 states and 196365 transitions. [2022-12-14 15:14:06,385 INFO L78 Accepts]: Start accepts. Automaton has 136191 states and 196365 transitions. Word has length 150 [2022-12-14 15:14:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:06,385 INFO L495 AbstractCegarLoop]: Abstraction has 136191 states and 196365 transitions. [2022-12-14 15:14:06,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:14:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 136191 states and 196365 transitions. [2022-12-14 15:14:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:14:06,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:06,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:14:06,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 15:14:06,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 15:14:06,719 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash 42797289, now seen corresponding path program 2 times [2022-12-14 15:14:06,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:06,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743558581] [2022-12-14 15:14:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:14:06,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:06,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743558581] [2022-12-14 15:14:06,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743558581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:06,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689200343] [2022-12-14 15:14:06,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:14:06,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:06,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:06,874 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:06,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 15:14:06,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:14:06,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:14:06,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:14:06,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:14:06,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:14:06,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689200343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:14:06,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:14:06,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:14:06,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390366877] [2022-12-14 15:14:06,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:14:06,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:14:06,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:14:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:14:06,987 INFO L87 Difference]: Start difference. First operand 136191 states and 196365 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:14:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:23,314 INFO L93 Difference]: Finished difference Result 193867 states and 280196 transitions. [2022-12-14 15:14:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:14:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 151 [2022-12-14 15:14:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:23,729 INFO L225 Difference]: With dead ends: 193867 [2022-12-14 15:14:23,729 INFO L226 Difference]: Without dead ends: 132615 [2022-12-14 15:14:23,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:14:23,865 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 40 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:23,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 470 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:14:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132615 states. [2022-12-14 15:14:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132615 to 132615. [2022-12-14 15:14:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132615 states, 114667 states have (on average 1.4431353397228497) internal successors, (165480), 115114 states have internal predecessors, (165480), 10723 states have call successors, (10723), 7206 states have call predecessors, (10723), 7223 states have return successors, (15434), 10296 states have call predecessors, (15434), 10720 states have call successors, (15434) [2022-12-14 15:14:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132615 states to 132615 states and 191637 transitions. [2022-12-14 15:14:40,841 INFO L78 Accepts]: Start accepts. Automaton has 132615 states and 191637 transitions. Word has length 151 [2022-12-14 15:14:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:40,841 INFO L495 AbstractCegarLoop]: Abstraction has 132615 states and 191637 transitions. [2022-12-14 15:14:40,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:14:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 132615 states and 191637 transitions. [2022-12-14 15:14:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:14:41,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:41,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:14:41,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 15:14:41,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:41,273 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1534736642, now seen corresponding path program 1 times [2022-12-14 15:14:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:41,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987661322] [2022-12-14 15:14:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:41,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:14:41,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:41,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987661322] [2022-12-14 15:14:41,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987661322] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:41,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805630256] [2022-12-14 15:14:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:41,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:41,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:41,428 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:41,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 15:14:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:41,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:14:41,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 15:14:41,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:14:41,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805630256] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:14:41,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:14:41,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:14:41,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754038603] [2022-12-14 15:14:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:14:41,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:14:41,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:14:41,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:14:41,573 INFO L87 Difference]: Start difference. First operand 132615 states and 191637 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:15:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:07,593 INFO L93 Difference]: Finished difference Result 326427 states and 471567 transitions. [2022-12-14 15:15:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:15:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 151 [2022-12-14 15:15:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:08,105 INFO L225 Difference]: With dead ends: 326427 [2022-12-14 15:15:08,106 INFO L226 Difference]: Without dead ends: 194599 [2022-12-14 15:15:08,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:15:08,318 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 579 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:08,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 556 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:15:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194599 states. [2022-12-14 15:15:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194599 to 194595. [2022-12-14 15:15:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194595 states, 167991 states have (on average 1.4265526129375978) internal successors, (239648), 168654 states have internal predecessors, (239648), 15843 states have call successors, (15843), 10742 states have call predecessors, (15843), 10759 states have return successors, (22718), 15200 states have call predecessors, (22718), 15840 states have call successors, (22718) [2022-12-14 15:15:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194595 states to 194595 states and 278209 transitions. [2022-12-14 15:15:33,852 INFO L78 Accepts]: Start accepts. Automaton has 194595 states and 278209 transitions. Word has length 151 [2022-12-14 15:15:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:33,852 INFO L495 AbstractCegarLoop]: Abstraction has 194595 states and 278209 transitions. [2022-12-14 15:15:33,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:15:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 194595 states and 278209 transitions. [2022-12-14 15:15:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 15:15:34,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:34,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:15:34,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-14 15:15:34,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 15:15:34,250 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2008507950, now seen corresponding path program 1 times [2022-12-14 15:15:34,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:15:34,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903773906] [2022-12-14 15:15:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:34,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:15:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:15:34,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:15:34,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903773906] [2022-12-14 15:15:34,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903773906] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:15:34,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933071546] [2022-12-14 15:15:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:34,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:15:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:15:34,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:15:34,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 15:15:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:15:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 15:15:34,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:15:34,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933071546] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:34,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:15:34,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:15:34,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98457802] [2022-12-14 15:15:34,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:34,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:15:34,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:15:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:15:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:15:34,580 INFO L87 Difference]: Start difference. First operand 194595 states and 278209 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:16:11,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:11,350 INFO L93 Difference]: Finished difference Result 464991 states and 663531 transitions. [2022-12-14 15:16:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:16:11,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 153 [2022-12-14 15:16:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:12,150 INFO L225 Difference]: With dead ends: 464991 [2022-12-14 15:16:12,150 INFO L226 Difference]: Without dead ends: 271183 [2022-12-14 15:16:12,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:16:12,454 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 533 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:12,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 558 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:16:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271183 states. [2022-12-14 15:16:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271183 to 271179. [2022-12-14 15:16:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271179 states, 232996 states have (on average 1.4078224518875861) internal successors, (328017), 233983 states have internal predecessors, (328017), 22780 states have call successors, (22780), 15384 states have call predecessors, (22780), 15401 states have return successors, (32804), 21813 states have call predecessors, (32804), 22777 states have call successors, (32804) [2022-12-14 15:16:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271179 states to 271179 states and 383601 transitions. [2022-12-14 15:16:49,850 INFO L78 Accepts]: Start accepts. Automaton has 271179 states and 383601 transitions. Word has length 153 [2022-12-14 15:16:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:49,851 INFO L495 AbstractCegarLoop]: Abstraction has 271179 states and 383601 transitions. [2022-12-14 15:16:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:16:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 271179 states and 383601 transitions. [2022-12-14 15:16:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 15:16:50,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:50,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:16:50,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 15:16:50,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 15:16:50,314 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:50,315 INFO L85 PathProgramCache]: Analyzing trace with hash 236178556, now seen corresponding path program 1 times [2022-12-14 15:16:50,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:50,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107900477] [2022-12-14 15:16:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:16:50,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:50,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107900477] [2022-12-14 15:16:50,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107900477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:50,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31648688] [2022-12-14 15:16:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:50,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:50,476 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:50,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e707566-d70e-4bfb-b9b7-8f880995bd21/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 15:16:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:16:50,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 15:16:50,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:16:50,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31648688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:50,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:16:50,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:16:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454607883] [2022-12-14 15:16:50,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:50,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:16:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:16:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:16:50,643 INFO L87 Difference]: Start difference. First operand 271179 states and 383601 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)