./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba --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 a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d --- 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-b5237d8 [2022-11-22 02:11:42,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:11:42,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:11:42,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:11:42,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:11:42,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:11:42,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:11:42,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:11:42,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:11:42,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:11:42,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:11:42,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:11:42,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:11:42,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:11:42,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:11:42,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:11:42,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:11:42,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:11:42,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:11:42,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:11:42,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:11:42,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:11:42,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:11:42,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:11:42,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:11:42,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:11:42,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:11:42,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:11:42,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:11:42,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:11:42,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:11:42,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:11:42,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:11:42,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:11:42,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:11:42,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:11:42,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:11:42,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:11:42,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:11:42,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:11:42,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:11:42,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:11:42,544 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:11:42,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:11:42,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:11:42,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:11:42,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:11:42,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:11:42,547 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:11:42,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:11:42,547 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:11:42,547 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:11:42,548 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:11:42,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:11:42,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:11:42,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:11:42,549 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:11:42,549 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:11:42,549 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:11:42,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:11:42,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:11:42,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:11:42,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:11:42,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:11:42,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:11:42,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:11:42,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:11:42,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:11:42,552 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:11:42,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:11:42,552 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:11:42,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:11:42,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:11:42,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:11:42,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:11:42,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:11:42,553 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:11:42,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:11:42,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:11:42,554 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:11:42,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:11:42,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:11:42,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:11:42,555 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_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d [2022-11-22 02:11:42,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:11:42,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:11:42,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:11:42,916 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:11:42,916 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:11:42,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-22 02:11:45,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:11:46,173 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:11:46,174 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-22 02:11:46,184 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/data/b477eb18b/225c0e4a1f5f47bb8b1574fa5b3544ad/FLAG77218cb9b [2022-11-22 02:11:46,203 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/data/b477eb18b/225c0e4a1f5f47bb8b1574fa5b3544ad [2022-11-22 02:11:46,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:11:46,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:11:46,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:11:46,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:11:46,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:11:46,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2ec25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46, skipping insertion in model container [2022-11-22 02:11:46,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:11:46,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:11:46,540 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_437a782e-68a2-4636-8296-16bd215a1aac/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-22 02:11:46,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:11:46,557 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:11:46,619 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_437a782e-68a2-4636-8296-16bd215a1aac/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-22 02:11:46,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:11:46,634 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:11:46,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46 WrapperNode [2022-11-22 02:11:46,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:11:46,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:11:46,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:11:46,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:11:46,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,695 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 477 [2022-11-22 02:11:46,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:11:46,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:11:46,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:11:46,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:11:46,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:11:46,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:11:46,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:11:46,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:11:46,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (1/1) ... [2022-11-22 02:11:46,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:11:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:46,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:11:46,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:11:46,849 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-22 02:11:46,849 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-22 02:11:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:11:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-22 02:11:46,850 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-22 02:11:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-22 02:11:46,851 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-22 02:11:46,851 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-11-22 02:11:46,851 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-11-22 02:11:46,851 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:11:46,851 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:11:46,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:11:46,852 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-22 02:11:46,852 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-22 02:11:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:11:46,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:11:46,853 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-22 02:11:46,853 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-22 02:11:46,985 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:11:46,995 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:11:47,708 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:11:47,910 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:11:47,910 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:11:47,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:11:47 BoogieIcfgContainer [2022-11-22 02:11:47,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:11:47,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:11:47,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:11:47,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:11:47,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:11:46" (1/3) ... [2022-11-22 02:11:47,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33118f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:11:47, skipping insertion in model container [2022-11-22 02:11:47,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:46" (2/3) ... [2022-11-22 02:11:47,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33118f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:11:47, skipping insertion in model container [2022-11-22 02:11:47,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:11:47" (3/3) ... [2022-11-22 02:11:47,926 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-22 02:11:47,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:11:47,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:11:48,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:11:48,099 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;@4dee9b70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:11:48,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:11:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 105 states have internal predecessors, (159), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 02:11:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:11:48,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:48,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:48,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash 331613024, now seen corresponding path program 1 times [2022-11-22 02:11:48,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:48,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891759306] [2022-11-22 02:11:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:11:48,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891759306] [2022-11-22 02:11:48,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891759306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:48,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:48,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:11:48,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031578918] [2022-11-22 02:11:48,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:48,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:11:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:48,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:11:48,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:11:48,837 INFO L87 Difference]: Start difference. First operand has 144 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 105 states have internal predecessors, (159), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:11:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:48,965 INFO L93 Difference]: Finished difference Result 289 states and 469 transitions. [2022-11-22 02:11:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:11:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-22 02:11:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:48,982 INFO L225 Difference]: With dead ends: 289 [2022-11-22 02:11:48,986 INFO L226 Difference]: Without dead ends: 147 [2022-11-22 02:11:48,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:11:48,999 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 5 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:49,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 611 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:11:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-22 02:11:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-22 02:11:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 107 states have internal predecessors, (160), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 02:11:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2022-11-22 02:11:49,095 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 19 [2022-11-22 02:11:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:49,097 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2022-11-22 02:11:49,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:11:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2022-11-22 02:11:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 02:11:49,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:49,101 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] [2022-11-22 02:11:49,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:11:49,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 455532572, now seen corresponding path program 1 times [2022-11-22 02:11:49,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:49,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408365523] [2022-11-22 02:11:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:49,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:11:49,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408365523] [2022-11-22 02:11:49,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408365523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:49,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:49,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:11:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410516612] [2022-11-22 02:11:49,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:49,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:11:49,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:49,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:11:49,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:11:49,436 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:11:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:49,537 INFO L93 Difference]: Finished difference Result 296 states and 447 transitions. [2022-11-22 02:11:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:11:49,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-22 02:11:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:49,540 INFO L225 Difference]: With dead ends: 296 [2022-11-22 02:11:49,540 INFO L226 Difference]: Without dead ends: 152 [2022-11-22 02:11:49,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:11:49,542 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 6 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:49,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 623 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:11:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-22 02:11:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-22 02:11:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 111 states have internal predecessors, (164), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 02:11:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 226 transitions. [2022-11-22 02:11:49,556 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 226 transitions. Word has length 28 [2022-11-22 02:11:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:49,557 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 226 transitions. [2022-11-22 02:11:49,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:11:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 226 transitions. [2022-11-22 02:11:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 02:11:49,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:49,559 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] [2022-11-22 02:11:49,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:11:49,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1914468921, now seen corresponding path program 1 times [2022-11-22 02:11:49,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:49,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152953397] [2022-11-22 02:11:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:11:49,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152953397] [2022-11-22 02:11:49,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152953397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:49,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:49,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:11:49,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088044879] [2022-11-22 02:11:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:49,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:11:49,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:11:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:11:49,780 INFO L87 Difference]: Start difference. First operand 152 states and 226 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:11:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:49,889 INFO L93 Difference]: Finished difference Result 306 states and 458 transitions. [2022-11-22 02:11:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:11:49,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-11-22 02:11:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:49,894 INFO L225 Difference]: With dead ends: 306 [2022-11-22 02:11:49,894 INFO L226 Difference]: Without dead ends: 157 [2022-11-22 02:11:49,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:11:49,904 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:49,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 609 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:11:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-22 02:11:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-22 02:11:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 115 states have (on average 1.4608695652173913) internal successors, (168), 115 states have internal predecessors, (168), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 02:11:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 230 transitions. [2022-11-22 02:11:49,922 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 230 transitions. Word has length 36 [2022-11-22 02:11:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:49,923 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 230 transitions. [2022-11-22 02:11:49,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:11:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 230 transitions. [2022-11-22 02:11:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:11:49,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:49,925 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] [2022-11-22 02:11:49,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:11:49,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1995142899, now seen corresponding path program 1 times [2022-11-22 02:11:49,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:49,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22831573] [2022-11-22 02:11:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:11:50,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:50,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22831573] [2022-11-22 02:11:50,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22831573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:50,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:50,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:11:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650734783] [2022-11-22 02:11:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:50,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:11:50,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:11:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:11:50,143 INFO L87 Difference]: Start difference. First operand 157 states and 230 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:11:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:50,208 INFO L93 Difference]: Finished difference Result 316 states and 466 transitions. [2022-11-22 02:11:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:11:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-22 02:11:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:50,211 INFO L225 Difference]: With dead ends: 316 [2022-11-22 02:11:50,211 INFO L226 Difference]: Without dead ends: 162 [2022-11-22 02:11:50,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:11:50,212 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:50,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 609 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:11:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-22 02:11:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-22 02:11:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 119 states have internal predecessors, (172), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 02:11:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-11-22 02:11:50,228 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 44 [2022-11-22 02:11:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:50,228 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-11-22 02:11:50,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:11:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-11-22 02:11:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:11:50,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:50,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:50,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:11:50,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:50,231 INFO L85 PathProgramCache]: Analyzing trace with hash -401316404, now seen corresponding path program 1 times [2022-11-22 02:11:50,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:50,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356777438] [2022-11-22 02:11:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:50,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:11:50,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:50,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356777438] [2022-11-22 02:11:50,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356777438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:50,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:50,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:11:50,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648637954] [2022-11-22 02:11:50,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:50,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:11:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:11:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:11:50,440 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:11:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:50,503 INFO L93 Difference]: Finished difference Result 325 states and 470 transitions. [2022-11-22 02:11:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:11:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-22 02:11:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:50,512 INFO L225 Difference]: With dead ends: 325 [2022-11-22 02:11:50,512 INFO L226 Difference]: Without dead ends: 166 [2022-11-22 02:11:50,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:11:50,514 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 5 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:50,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 618 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:11:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-22 02:11:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-22 02:11:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 122 states have (on average 1.4344262295081966) internal successors, (175), 122 states have internal predecessors, (175), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 02:11:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 237 transitions. [2022-11-22 02:11:50,524 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 237 transitions. Word has length 44 [2022-11-22 02:11:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:50,525 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 237 transitions. [2022-11-22 02:11:50,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:11:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 237 transitions. [2022-11-22 02:11:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:11:50,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:50,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:50,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:11:50,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1513077261, now seen corresponding path program 1 times [2022-11-22 02:11:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286113357] [2022-11-22 02:11:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:50,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:11:50,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286113357] [2022-11-22 02:11:50,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286113357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:50,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:50,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:11:50,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278878938] [2022-11-22 02:11:50,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:50,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:11:50,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:11:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:11:50,791 INFO L87 Difference]: Start difference. First operand 166 states and 237 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 02:11:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:50,856 INFO L93 Difference]: Finished difference Result 335 states and 479 transitions. [2022-11-22 02:11:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:11:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-11-22 02:11:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:50,859 INFO L225 Difference]: With dead ends: 335 [2022-11-22 02:11:50,860 INFO L226 Difference]: Without dead ends: 172 [2022-11-22 02:11:50,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:11:50,862 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 7 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:50,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 620 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:11:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-22 02:11:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-22 02:11:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 127 states have (on average 1.4173228346456692) internal successors, (180), 127 states have internal predecessors, (180), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 02:11:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 242 transitions. [2022-11-22 02:11:50,878 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 242 transitions. Word has length 52 [2022-11-22 02:11:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:50,879 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 242 transitions. [2022-11-22 02:11:50,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 02:11:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 242 transitions. [2022-11-22 02:11:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 02:11:50,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:50,893 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:11:50,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:11:50,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2060811264, now seen corresponding path program 1 times [2022-11-22 02:11:50,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:50,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781853605] [2022-11-22 02:11:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:11:51,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:51,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781853605] [2022-11-22 02:11:51,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781853605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179486624] [2022-11-22 02:11:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:51,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:51,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:51,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:11:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:11:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:11:51,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:11:51,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179486624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:51,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:11:51,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-22 02:11:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40438247] [2022-11-22 02:11:51,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:11:51,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:11:51,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:11:51,959 INFO L87 Difference]: Start difference. First operand 172 states and 242 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:11:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:52,339 INFO L93 Difference]: Finished difference Result 510 states and 710 transitions. [2022-11-22 02:11:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:11:52,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2022-11-22 02:11:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:52,342 INFO L225 Difference]: With dead ends: 510 [2022-11-22 02:11:52,342 INFO L226 Difference]: Without dead ends: 331 [2022-11-22 02:11:52,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:11:52,344 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 201 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:52,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1267 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:11:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-22 02:11:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2022-11-22 02:11:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 240 states have (on average 1.4083333333333334) internal successors, (338), 241 states have internal predecessors, (338), 60 states have call successors, (60), 26 states have call predecessors, (60), 26 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-22 02:11:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 458 transitions. [2022-11-22 02:11:52,364 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 458 transitions. Word has length 55 [2022-11-22 02:11:52,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:52,364 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 458 transitions. [2022-11-22 02:11:52,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:11:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 458 transitions. [2022-11-22 02:11:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 02:11:52,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:52,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:52,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:11:52,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:52,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash -133773083, now seen corresponding path program 1 times [2022-11-22 02:11:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514436836] [2022-11-22 02:11:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:52,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:11:53,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:53,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514436836] [2022-11-22 02:11:53,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514436836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:53,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319347863] [2022-11-22 02:11:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:53,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:53,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:53,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:53,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:11:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:11:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:11:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:11:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:11:53,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319347863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:11:53,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188146871] [2022-11-22 02:11:53,925 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-22 02:11:53,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:11:53,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:11:53,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:11:53,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:11:56,902 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 02:11:56,945 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:11:56,978 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-22 02:11:57,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:12:09,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [188146871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:09,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:12:09,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-22 02:12:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714314639] [2022-11-22 02:12:09,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:12:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:12:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:12:09,129 INFO L87 Difference]: Start difference. First operand 327 states and 458 transitions. Second operand has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:12:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:17,165 INFO L93 Difference]: Finished difference Result 740 states and 1044 transitions. [2022-11-22 02:12:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:12:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-11-22 02:12:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:17,170 INFO L225 Difference]: With dead ends: 740 [2022-11-22 02:12:17,170 INFO L226 Difference]: Without dead ends: 416 [2022-11-22 02:12:17,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:12:17,172 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 194 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:17,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 2942 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-22 02:12:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-22 02:12:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 393. [2022-11-22 02:12:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 287 states have (on average 1.386759581881533) internal successors, (398), 288 states have internal predecessors, (398), 75 states have call successors, (75), 30 states have call predecessors, (75), 30 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-22 02:12:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 548 transitions. [2022-11-22 02:12:17,236 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 548 transitions. Word has length 57 [2022-11-22 02:12:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:17,237 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 548 transitions. [2022-11-22 02:12:17,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:12:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 548 transitions. [2022-11-22 02:12:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 02:12:17,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:17,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:17,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:17,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash 827590853, now seen corresponding path program 1 times [2022-11-22 02:12:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436884658] [2022-11-22 02:12:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:12:17,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:17,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436884658] [2022-11-22 02:12:17,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436884658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:17,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589866763] [2022-11-22 02:12:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:17,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:17,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:17,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:17,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:12:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:12:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:12:18,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:12:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:12:18,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589866763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:12:18,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462108334] [2022-11-22 02:12:18,418 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-22 02:12:18,418 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:12:18,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:12:18,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:12:18,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:12:21,646 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 02:12:21,680 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 02:12:21,718 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 02:12:21,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:12:36,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1462108334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:36,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:12:36,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 9, 9] total 34 [2022-11-22 02:12:36,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17712166] [2022-11-22 02:12:36,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:36,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:12:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:12:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:12:36,704 INFO L87 Difference]: Start difference. First operand 393 states and 548 transitions. Second operand has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:12:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:41,334 INFO L93 Difference]: Finished difference Result 813 states and 1151 transitions. [2022-11-22 02:12:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:12:41,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2022-11-22 02:12:41,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:41,344 INFO L225 Difference]: With dead ends: 813 [2022-11-22 02:12:41,344 INFO L226 Difference]: Without dead ends: 489 [2022-11-22 02:12:41,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:12:41,348 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 156 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:41,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2422 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:12:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-22 02:12:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 457. [2022-11-22 02:12:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 333 states have (on average 1.3723723723723724) internal successors, (457), 334 states have internal predecessors, (457), 90 states have call successors, (90), 33 states have call predecessors, (90), 33 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-22 02:12:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 637 transitions. [2022-11-22 02:12:41,454 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 637 transitions. Word has length 57 [2022-11-22 02:12:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:41,455 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 637 transitions. [2022-11-22 02:12:41,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:12:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 637 transitions. [2022-11-22 02:12:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-22 02:12:41,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:41,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:41,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:12:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:12:41,663 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash 152385642, now seen corresponding path program 1 times [2022-11-22 02:12:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:41,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748653821] [2022-11-22 02:12:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:12:42,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:42,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748653821] [2022-11-22 02:12:42,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748653821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141696673] [2022-11-22 02:12:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:42,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:42,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:42,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:42,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:12:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:12:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:12:42,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:12:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:12:42,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141696673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:12:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555352919] [2022-11-22 02:12:42,623 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-22 02:12:42,623 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:12:42,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:12:42,624 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:12:42,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:12:44,292 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 02:12:44,322 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:12:44,340 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-22 02:12:44,366 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:12:58,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1555352919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:58,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:12:58,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-22 02:12:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436492199] [2022-11-22 02:12:58,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:58,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:12:58,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:12:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:12:58,208 INFO L87 Difference]: Start difference. First operand 457 states and 637 transitions. Second operand has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:13:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:07,174 INFO L93 Difference]: Finished difference Result 866 states and 1221 transitions. [2022-11-22 02:13:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 02:13:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-11-22 02:13:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:07,178 INFO L225 Difference]: With dead ends: 866 [2022-11-22 02:13:07,178 INFO L226 Difference]: Without dead ends: 542 [2022-11-22 02:13:07,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 02:13:07,180 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 143 mSDsluCounter, 3036 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:07,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 3344 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-22 02:13:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-22 02:13:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 493. [2022-11-22 02:13:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 359 states have (on average 1.3565459610027855) internal successors, (487), 360 states have internal predecessors, (487), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-22 02:13:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 681 transitions. [2022-11-22 02:13:07,288 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 681 transitions. Word has length 59 [2022-11-22 02:13:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:07,288 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 681 transitions. [2022-11-22 02:13:07,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:13:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 681 transitions. [2022-11-22 02:13:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 02:13:07,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:07,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:07,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:07,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:07,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:07,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1305511079, now seen corresponding path program 1 times [2022-11-22 02:13:07,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:07,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074778561] [2022-11-22 02:13:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:07,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:13:07,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:07,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074778561] [2022-11-22 02:13:07,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074778561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:07,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:07,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:13:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044996683] [2022-11-22 02:13:07,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:07,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:13:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:13:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:13:07,635 INFO L87 Difference]: Start difference. First operand 493 states and 681 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 02:13:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:07,772 INFO L93 Difference]: Finished difference Result 893 states and 1255 transitions. [2022-11-22 02:13:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:13:07,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 61 [2022-11-22 02:13:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:07,777 INFO L225 Difference]: With dead ends: 893 [2022-11-22 02:13:07,777 INFO L226 Difference]: Without dead ends: 501 [2022-11-22 02:13:07,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:07,778 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 5 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:07,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 618 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:13:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-22 02:13:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-22 02:13:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 365 states have (on average 1.3506849315068492) internal successors, (493), 366 states have internal predecessors, (493), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-22 02:13:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 687 transitions. [2022-11-22 02:13:07,882 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 687 transitions. Word has length 61 [2022-11-22 02:13:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:07,882 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 687 transitions. [2022-11-22 02:13:07,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 02:13:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 687 transitions. [2022-11-22 02:13:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 02:13:07,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:07,884 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, 1] [2022-11-22 02:13:07,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:13:07,885 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash 219036085, now seen corresponding path program 1 times [2022-11-22 02:13:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:07,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503617426] [2022-11-22 02:13:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:13:08,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503617426] [2022-11-22 02:13:08,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503617426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56470328] [2022-11-22 02:13:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:08,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:08,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:08,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:08,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:13:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:08,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:13:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:08,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:13:08,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56470328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:13:08,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104106874] [2022-11-22 02:13:08,816 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2022-11-22 02:13:08,816 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:13:08,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:13:08,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:13:08,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:13:12,486 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-22 02:13:12,732 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:13:12,749 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-11-22 02:13:12,901 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-22 02:13:12,939 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-22 02:13:13,005 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 02:13:13,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:13:55,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13533#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-22 02:13:55,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:13:55,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:13:55,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-22 02:13:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67759110] [2022-11-22 02:13:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:13:55,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:13:55,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:13:55,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2503, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 02:13:55,210 INFO L87 Difference]: Start difference. First operand 501 states and 687 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 02:13:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:55,910 INFO L93 Difference]: Finished difference Result 1221 states and 1699 transitions. [2022-11-22 02:13:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:13:55,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 65 [2022-11-22 02:13:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:55,916 INFO L225 Difference]: With dead ends: 1221 [2022-11-22 02:13:55,917 INFO L226 Difference]: Without dead ends: 837 [2022-11-22 02:13:55,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=277, Invalid=3029, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 02:13:55,920 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 299 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:55,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 3396 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:13:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-22 02:13:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 529. [2022-11-22 02:13:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 386 states have (on average 1.3160621761658031) internal successors, (508), 389 states have internal predecessors, (508), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-22 02:13:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 698 transitions. [2022-11-22 02:13:56,057 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 698 transitions. Word has length 65 [2022-11-22 02:13:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:56,059 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 698 transitions. [2022-11-22 02:13:56,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 02:13:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 698 transitions. [2022-11-22 02:13:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 02:13:56,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:56,064 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:56,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:56,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:13:56,270 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:56,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1688305221, now seen corresponding path program 1 times [2022-11-22 02:13:56,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:56,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292089403] [2022-11-22 02:13:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:56,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:13:56,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:56,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292089403] [2022-11-22 02:13:56,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292089403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:56,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:56,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:13:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88523300] [2022-11-22 02:13:56,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:13:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:13:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:13:56,625 INFO L87 Difference]: Start difference. First operand 529 states and 698 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:13:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:57,411 INFO L93 Difference]: Finished difference Result 1167 states and 1611 transitions. [2022-11-22 02:13:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:13:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-11-22 02:13:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:57,416 INFO L225 Difference]: With dead ends: 1167 [2022-11-22 02:13:57,417 INFO L226 Difference]: Without dead ends: 861 [2022-11-22 02:13:57,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:13:57,421 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 538 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:57,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1810 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:13:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-22 02:13:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 657. [2022-11-22 02:13:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 477 states have (on average 1.3123689727463312) internal successors, (626), 480 states have internal predecessors, (626), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-22 02:13:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 864 transitions. [2022-11-22 02:13:57,570 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 864 transitions. Word has length 66 [2022-11-22 02:13:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:57,570 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 864 transitions. [2022-11-22 02:13:57,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:13:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 864 transitions. [2022-11-22 02:13:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 02:13:57,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:57,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:57,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:13:57,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1045684058, now seen corresponding path program 1 times [2022-11-22 02:13:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:57,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793758964] [2022-11-22 02:13:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:57,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:13:57,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:57,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793758964] [2022-11-22 02:13:57,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793758964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:57,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:57,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:13:57,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490682337] [2022-11-22 02:13:57,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:57,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:13:57,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:13:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:13:57,853 INFO L87 Difference]: Start difference. First operand 657 states and 864 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 02:13:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:58,689 INFO L93 Difference]: Finished difference Result 1524 states and 2101 transitions. [2022-11-22 02:13:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:13:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-11-22 02:13:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:58,696 INFO L225 Difference]: With dead ends: 1524 [2022-11-22 02:13:58,696 INFO L226 Difference]: Without dead ends: 1194 [2022-11-22 02:13:58,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:13:58,698 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 580 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:58,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 2174 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:13:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-22 02:13:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 919. [2022-11-22 02:13:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 664 states have (on average 1.3207831325301205) internal successors, (877), 669 states have internal predecessors, (877), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-22 02:13:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1215 transitions. [2022-11-22 02:13:58,883 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1215 transitions. Word has length 68 [2022-11-22 02:13:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:58,884 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1215 transitions. [2022-11-22 02:13:58,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 02:13:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1215 transitions. [2022-11-22 02:13:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 02:13:58,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:58,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:58,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:13:58,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:58,886 INFO L85 PathProgramCache]: Analyzing trace with hash 508139515, now seen corresponding path program 1 times [2022-11-22 02:13:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:58,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217152762] [2022-11-22 02:13:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:58,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:13:59,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217152762] [2022-11-22 02:13:59,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217152762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721381826] [2022-11-22 02:13:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:59,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:59,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:59,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:13:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:13:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:13:59,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:13:59,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721381826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:13:59,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777942362] [2022-11-22 02:13:59,626 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-22 02:13:59,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:13:59,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:13:59,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:13:59,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:03,194 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 02:14:03,229 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 02:14:03,250 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-22 02:14:03,323 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 02:14:03,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:14:30,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [777942362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:30,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:14:30,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [8, 9, 9] total 45 [2022-11-22 02:14:30,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165992766] [2022-11-22 02:14:30,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 02:14:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 02:14:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:14:30,424 INFO L87 Difference]: Start difference. First operand 919 states and 1215 transitions. Second operand has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-22 02:14:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:37,426 INFO L93 Difference]: Finished difference Result 1488 states and 1984 transitions. [2022-11-22 02:14:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 02:14:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 72 [2022-11-22 02:14:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:37,437 INFO L225 Difference]: With dead ends: 1488 [2022-11-22 02:14:37,437 INFO L226 Difference]: Without dead ends: 905 [2022-11-22 02:14:37,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 02:14:37,440 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 93 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:37,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2718 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-22 02:14:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-22 02:14:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-11-22 02:14:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 654 states have (on average 1.319571865443425) internal successors, (863), 659 states have internal predecessors, (863), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-22 02:14:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1195 transitions. [2022-11-22 02:14:37,579 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1195 transitions. Word has length 72 [2022-11-22 02:14:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:37,580 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1195 transitions. [2022-11-22 02:14:37,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-22 02:14:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1195 transitions. [2022-11-22 02:14:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 02:14:37,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:37,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:37,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:14:37,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:14:37,793 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash -963077093, now seen corresponding path program 1 times [2022-11-22 02:14:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:37,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864220459] [2022-11-22 02:14:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:14:38,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864220459] [2022-11-22 02:14:38,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864220459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083108687] [2022-11-22 02:14:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:38,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:38,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:38,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:38,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:14:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:38,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:14:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:14:38,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:14:38,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083108687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:38,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:14:38,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-22 02:14:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242143668] [2022-11-22 02:14:38,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:38,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:14:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:14:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:14:38,426 INFO L87 Difference]: Start difference. First operand 905 states and 1195 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:14:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:39,056 INFO L93 Difference]: Finished difference Result 1770 states and 2402 transitions. [2022-11-22 02:14:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:14:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 72 [2022-11-22 02:14:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:39,061 INFO L225 Difference]: With dead ends: 1770 [2022-11-22 02:14:39,062 INFO L226 Difference]: Without dead ends: 1070 [2022-11-22 02:14:39,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:14:39,064 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 494 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1510 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:14:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-11-22 02:14:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 905. [2022-11-22 02:14:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 654 states have (on average 1.3134556574923548) internal successors, (859), 659 states have internal predecessors, (859), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-22 02:14:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1191 transitions. [2022-11-22 02:14:39,232 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1191 transitions. Word has length 72 [2022-11-22 02:14:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:39,233 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1191 transitions. [2022-11-22 02:14:39,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:14:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1191 transitions. [2022-11-22 02:14:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 02:14:39,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:39,235 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:39,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:39,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:39,441 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash 192208881, now seen corresponding path program 1 times [2022-11-22 02:14:39,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:39,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863163773] [2022-11-22 02:14:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:14:39,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:39,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863163773] [2022-11-22 02:14:39,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863163773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:39,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:39,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:14:39,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974511417] [2022-11-22 02:14:39,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:39,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:14:39,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:14:39,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:14:39,655 INFO L87 Difference]: Start difference. First operand 905 states and 1191 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 02:14:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:39,927 INFO L93 Difference]: Finished difference Result 1194 states and 1643 transitions. [2022-11-22 02:14:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:14:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 75 [2022-11-22 02:14:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:39,933 INFO L225 Difference]: With dead ends: 1194 [2022-11-22 02:14:39,934 INFO L226 Difference]: Without dead ends: 1192 [2022-11-22 02:14:39,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:14:39,935 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 153 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:39,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1489 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-11-22 02:14:40,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 913. [2022-11-22 02:14:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 658 states have (on average 1.3115501519756838) internal successors, (863), 665 states have internal predecessors, (863), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2022-11-22 02:14:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1199 transitions. [2022-11-22 02:14:40,114 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1199 transitions. Word has length 75 [2022-11-22 02:14:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:40,115 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1199 transitions. [2022-11-22 02:14:40,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 02:14:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1199 transitions. [2022-11-22 02:14:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 02:14:40,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:40,118 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:40,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:14:40,118 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash 94923755, now seen corresponding path program 1 times [2022-11-22 02:14:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:40,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912146499] [2022-11-22 02:14:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:40,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:14:40,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912146499] [2022-11-22 02:14:40,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912146499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:40,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:40,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:14:40,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318359139] [2022-11-22 02:14:40,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:14:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:14:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:14:40,362 INFO L87 Difference]: Start difference. First operand 913 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 02:14:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:40,567 INFO L93 Difference]: Finished difference Result 1579 states and 2085 transitions. [2022-11-22 02:14:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:14:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 78 [2022-11-22 02:14:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:40,571 INFO L225 Difference]: With dead ends: 1579 [2022-11-22 02:14:40,572 INFO L226 Difference]: Without dead ends: 901 [2022-11-22 02:14:40,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:14:40,574 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:40,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 610 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:14:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-11-22 02:14:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 901. [2022-11-22 02:14:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 652 states have (on average 1.2868098159509203) internal successors, (839), 659 states have internal predecessors, (839), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-22 02:14:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1163 transitions. [2022-11-22 02:14:40,753 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1163 transitions. Word has length 78 [2022-11-22 02:14:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:40,753 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1163 transitions. [2022-11-22 02:14:40,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 02:14:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1163 transitions. [2022-11-22 02:14:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 02:14:40,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:40,755 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 02:14:40,755 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash -662976287, now seen corresponding path program 1 times [2022-11-22 02:14:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:40,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913923891] [2022-11-22 02:14:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:40,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:14:41,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:41,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913923891] [2022-11-22 02:14:41,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913923891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:41,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355885083] [2022-11-22 02:14:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:41,161 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:41,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:14:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:14:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:14:41,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:14:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:14:41,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355885083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:14:41,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211038001] [2022-11-22 02:14:41,776 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-22 02:14:41,776 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:14:41,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:14:41,777 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:14:41,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:45,373 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 217 for LOIs [2022-11-22 02:14:45,559 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:14:45,575 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 121 for LOIs [2022-11-22 02:14:45,671 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-11-22 02:14:45,692 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 101 for LOIs [2022-11-22 02:14:45,723 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-22 02:14:45,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:22,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35484#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (<= 0 ~manual_selection_History_2~0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= ~manual_selection_History_2~0 0) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-22 02:15:22,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:15:22,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:22,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-22 02:15:22,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266772393] [2022-11-22 02:15:22,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:15:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:15:22,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:15:22,262 INFO L87 Difference]: Start difference. First operand 901 states and 1163 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-22 02:15:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:22,980 INFO L93 Difference]: Finished difference Result 1916 states and 2549 transitions. [2022-11-22 02:15:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:15:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 80 [2022-11-22 02:15:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:22,987 INFO L225 Difference]: With dead ends: 1916 [2022-11-22 02:15:22,987 INFO L226 Difference]: Without dead ends: 1175 [2022-11-22 02:15:22,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=363, Invalid=3797, Unknown=0, NotChecked=0, Total=4160 [2022-11-22 02:15:22,991 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 242 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:22,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 2361 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:15:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-11-22 02:15:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 880. [2022-11-22 02:15:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 637 states have (on average 1.2794348508634223) internal successors, (815), 644 states have internal predecessors, (815), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-22 02:15:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1127 transitions. [2022-11-22 02:15:23,195 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1127 transitions. Word has length 80 [2022-11-22 02:15:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:23,195 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1127 transitions. [2022-11-22 02:15:23,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-22 02:15:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1127 transitions. [2022-11-22 02:15:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 02:15:23,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:23,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:23,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 02:15:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:23,404 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:15:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash -394555029, now seen corresponding path program 1 times [2022-11-22 02:15:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:23,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418068112] [2022-11-22 02:15:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:23,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 02:15:23,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:23,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418068112] [2022-11-22 02:15:23,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418068112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:23,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886470151] [2022-11-22 02:15:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:23,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:23,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:23,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:15:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:15:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:15:24,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:15:24,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886470151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:24,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861523829] [2022-11-22 02:15:24,148 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-22 02:15:24,149 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:24,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:24,149 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:24,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:26,323 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 02:15:26,345 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 02:15:26,362 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 94 for LOIs [2022-11-22 02:15:26,439 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 100 for LOIs [2022-11-22 02:15:26,466 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-22 02:15:26,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:53,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1861523829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:53,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:53,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-22 02:15:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700461478] [2022-11-22 02:15:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:53,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 02:15:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 02:15:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 02:15:53,291 INFO L87 Difference]: Start difference. First operand 880 states and 1127 transitions. Second operand has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-22 02:16:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:19,353 INFO L93 Difference]: Finished difference Result 1489 states and 1937 transitions. [2022-11-22 02:16:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 02:16:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 80 [2022-11-22 02:16:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:19,358 INFO L225 Difference]: With dead ends: 1489 [2022-11-22 02:16:19,358 INFO L226 Difference]: Without dead ends: 915 [2022-11-22 02:16:19,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 02:16:19,361 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 355 mSDsluCounter, 3971 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:19,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 4234 Invalid, 3466 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [150 Valid, 3316 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-22 02:16:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-22 02:16:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 883. [2022-11-22 02:16:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 639 states have (on average 1.2785602503912363) internal successors, (817), 646 states have internal predecessors, (817), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-22 02:16:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1131 transitions. [2022-11-22 02:16:19,578 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1131 transitions. Word has length 80 [2022-11-22 02:16:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:19,579 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1131 transitions. [2022-11-22 02:16:19,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-22 02:16:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1131 transitions. [2022-11-22 02:16:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 02:16:19,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:19,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:19,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:19,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:19,786 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1646880730, now seen corresponding path program 1 times [2022-11-22 02:16:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:19,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386631660] [2022-11-22 02:16:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:19,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 02:16:20,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386631660] [2022-11-22 02:16:20,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386631660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589016041] [2022-11-22 02:16:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:20,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:20,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:20,116 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:16:20,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:16:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:16:20,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:16:20,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:16:20,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589016041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:16:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494554383] [2022-11-22 02:16:20,515 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-22 02:16:20,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:16:20,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:16:20,516 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:16:20,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:16:24,285 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 02:16:24,307 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:16:24,323 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-22 02:16:24,424 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-22 02:16:24,469 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-22 02:16:24,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:17:03,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [494554383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:03,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:17:03,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-22 02:17:03,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595915480] [2022-11-22 02:17:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 02:17:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 02:17:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2513, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 02:17:03,143 INFO L87 Difference]: Start difference. First operand 883 states and 1131 transitions. Second operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-22 02:17:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:13,634 INFO L93 Difference]: Finished difference Result 1492 states and 1941 transitions. [2022-11-22 02:17:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 02:17:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 82 [2022-11-22 02:17:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:13,638 INFO L225 Difference]: With dead ends: 1492 [2022-11-22 02:17:13,638 INFO L226 Difference]: Without dead ends: 918 [2022-11-22 02:17:13,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 193 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:17:13,641 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 124 mSDsluCounter, 4831 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 5129 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:13,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 5129 Invalid, 3780 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-11-22 02:17:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-22 02:17:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 886. [2022-11-22 02:17:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 648 states have internal predecessors, (819), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-22 02:17:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1135 transitions. [2022-11-22 02:17:13,860 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1135 transitions. Word has length 82 [2022-11-22 02:17:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:13,861 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1135 transitions. [2022-11-22 02:17:13,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-22 02:17:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1135 transitions. [2022-11-22 02:17:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 02:17:13,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:13,863 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:13,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 02:17:14,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:14,069 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:14,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1993333853, now seen corresponding path program 1 times [2022-11-22 02:17:14,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:14,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816873554] [2022-11-22 02:17:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:14,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:17:14,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816873554] [2022-11-22 02:17:14,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816873554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:14,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:14,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:17:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227459658] [2022-11-22 02:17:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:17:14,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:17:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:17:14,239 INFO L87 Difference]: Start difference. First operand 886 states and 1135 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-22 02:17:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:14,505 INFO L93 Difference]: Finished difference Result 1513 states and 1955 transitions. [2022-11-22 02:17:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:17:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2022-11-22 02:17:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:14,513 INFO L225 Difference]: With dead ends: 1513 [2022-11-22 02:17:14,514 INFO L226 Difference]: Without dead ends: 874 [2022-11-22 02:17:14,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:14,517 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:14,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 592 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-22 02:17:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 874. [2022-11-22 02:17:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 635 states have (on average 1.2519685039370079) internal successors, (795), 642 states have internal predecessors, (795), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-22 02:17:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1099 transitions. [2022-11-22 02:17:14,732 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1099 transitions. Word has length 87 [2022-11-22 02:17:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:14,732 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1099 transitions. [2022-11-22 02:17:14,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-22 02:17:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1099 transitions. [2022-11-22 02:17:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 02:17:14,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:14,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:14,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-22 02:17:14,735 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1959131448, now seen corresponding path program 1 times [2022-11-22 02:17:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003716304] [2022-11-22 02:17:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:17:15,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:15,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003716304] [2022-11-22 02:17:15,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003716304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:17:15,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625323448] [2022-11-22 02:17:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:15,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:15,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:15,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:17:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:17:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:17:15,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:17:15,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625323448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:15,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774653910] [2022-11-22 02:17:15,442 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-22 02:17:15,443 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:17:15,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:17:15,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:17:15,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:17:18,800 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 02:17:18,836 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:17:18,865 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-22 02:17:18,977 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-22 02:17:19,341 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 02:17:19,385 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:18:02,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [774653910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:02,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:18:02,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-22 02:18:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365057067] [2022-11-22 02:18:02,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:02,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 02:18:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 02:18:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2588, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:18:02,713 INFO L87 Difference]: Start difference. First operand 874 states and 1099 transitions. Second operand has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-22 02:18:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:14,122 INFO L93 Difference]: Finished difference Result 1462 states and 1864 transitions. [2022-11-22 02:18:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 02:18:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 87 [2022-11-22 02:18:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:14,126 INFO L225 Difference]: With dead ends: 1462 [2022-11-22 02:18:14,126 INFO L226 Difference]: Without dead ends: 896 [2022-11-22 02:18:14,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 02:18:14,129 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 232 mSDsluCounter, 4747 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 5010 SdHoareTripleChecker+Invalid, 4080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:14,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 5010 Invalid, 4080 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-22 02:18:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-22 02:18:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-11-22 02:18:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 626 states have (on average 1.2492012779552715) internal successors, (782), 633 states have internal predecessors, (782), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-22 02:18:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1078 transitions. [2022-11-22 02:18:14,329 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1078 transitions. Word has length 87 [2022-11-22 02:18:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:14,332 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1078 transitions. [2022-11-22 02:18:14,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-22 02:18:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1078 transitions. [2022-11-22 02:18:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-22 02:18:14,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:14,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:14,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:14,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:14,540 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1376257965, now seen corresponding path program 1 times [2022-11-22 02:18:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:14,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630932730] [2022-11-22 02:18:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:14,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:18:14,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:14,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630932730] [2022-11-22 02:18:14,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630932730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051842032] [2022-11-22 02:18:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:14,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:14,901 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:14,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:18:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:18:15,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:18:15,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:18:15,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051842032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:15,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477818748] [2022-11-22 02:18:15,356 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-22 02:18:15,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:18:15,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:18:15,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:18:15,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:18:18,390 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 02:18:18,423 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:18:18,439 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-22 02:18:18,782 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-22 02:18:19,141 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-22 02:18:19,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:03,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [477818748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:03,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:03,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-22 02:19:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263662769] [2022-11-22 02:19:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:03,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 02:19:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 02:19:03,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2618, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:19:03,291 INFO L87 Difference]: Start difference. First operand 861 states and 1078 transitions. Second operand has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-22 02:19:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:14,019 INFO L93 Difference]: Finished difference Result 1462 states and 1864 transitions. [2022-11-22 02:19:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 02:19:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 89 [2022-11-22 02:19:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:14,023 INFO L225 Difference]: With dead ends: 1462 [2022-11-22 02:19:14,024 INFO L226 Difference]: Without dead ends: 893 [2022-11-22 02:19:14,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 215 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=252, Invalid=2718, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 02:19:14,026 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 303 mSDsluCounter, 4726 mSDsCounter, 0 mSdLazyCounter, 3872 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 5006 SdHoareTripleChecker+Invalid, 3965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:14,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 5006 Invalid, 3965 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [93 Valid, 3872 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-22 02:19:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-22 02:19:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 861. [2022-11-22 02:19:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 626 states have (on average 1.2476038338658146) internal successors, (781), 633 states have internal predecessors, (781), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-22 02:19:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1077 transitions. [2022-11-22 02:19:14,240 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1077 transitions. Word has length 89 [2022-11-22 02:19:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:14,241 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1077 transitions. [2022-11-22 02:19:14,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-22 02:19:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1077 transitions. [2022-11-22 02:19:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 02:19:14,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:14,243 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:14,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-22 02:19:14,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 02:19:14,452 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash -2118828422, now seen corresponding path program 1 times [2022-11-22 02:19:14,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:14,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114663810] [2022-11-22 02:19:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:14,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:19:14,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114663810] [2022-11-22 02:19:14,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114663810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814586536] [2022-11-22 02:19:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:14,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:14,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:14,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:19:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:19:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:19:15,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:19:15,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814586536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:15,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982410869] [2022-11-22 02:19:15,225 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-22 02:19:15,225 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:15,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:15,226 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:15,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:17,997 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 02:19:18,019 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:19:18,037 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 93 for LOIs [2022-11-22 02:19:18,115 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 135 for LOIs [2022-11-22 02:19:18,384 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-22 02:19:18,407 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:54,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [982410869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:54,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:54,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 9, 9] total 59 [2022-11-22 02:19:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059698681] [2022-11-22 02:19:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-22 02:19:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-22 02:19:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3106, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 02:19:54,764 INFO L87 Difference]: Start difference. First operand 861 states and 1077 transitions. Second operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-22 02:20:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:26,271 INFO L93 Difference]: Finished difference Result 1449 states and 1842 transitions. [2022-11-22 02:20:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 02:20:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 93 [2022-11-22 02:20:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:26,275 INFO L225 Difference]: With dead ends: 1449 [2022-11-22 02:20:26,276 INFO L226 Difference]: Without dead ends: 883 [2022-11-22 02:20:26,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 217 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=568, Invalid=4982, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 02:20:26,279 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 284 mSDsluCounter, 4631 mSDsCounter, 0 mSdLazyCounter, 3690 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:26,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 4916 Invalid, 3828 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 3690 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-22 02:20:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-22 02:20:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 848. [2022-11-22 02:20:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 617 states have (on average 1.2447325769854134) internal successors, (768), 624 states have internal predecessors, (768), 144 states have call successors, (144), 86 states have call predecessors, (144), 86 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2022-11-22 02:20:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1056 transitions. [2022-11-22 02:20:26,428 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1056 transitions. Word has length 93 [2022-11-22 02:20:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:26,428 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1056 transitions. [2022-11-22 02:20:26,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-22 02:20:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1056 transitions. [2022-11-22 02:20:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 02:20:26,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:26,430 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:26,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:26,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 02:20:26,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash 980190837, now seen corresponding path program 1 times [2022-11-22 02:20:26,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241789268] [2022-11-22 02:20:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:26,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-22 02:20:26,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:26,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241789268] [2022-11-22 02:20:26,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241789268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:26,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:26,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:20:26,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858079064] [2022-11-22 02:20:26,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:26,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:20:26,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:20:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:20:26,832 INFO L87 Difference]: Start difference. First operand 848 states and 1056 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-22 02:20:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:27,081 INFO L93 Difference]: Finished difference Result 1415 states and 1789 transitions. [2022-11-22 02:20:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:20:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 103 [2022-11-22 02:20:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:27,085 INFO L225 Difference]: With dead ends: 1415 [2022-11-22 02:20:27,085 INFO L226 Difference]: Without dead ends: 836 [2022-11-22 02:20:27,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:20:27,087 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 7 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:27,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:20:27,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-22 02:20:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 786. [2022-11-22 02:20:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 575 states have (on average 1.2104347826086956) internal successors, (696), 582 states have internal predecessors, (696), 130 states have call successors, (130), 80 states have call predecessors, (130), 80 states have return successors, (130), 123 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-22 02:20:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 956 transitions. [2022-11-22 02:20:27,293 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 956 transitions. Word has length 103 [2022-11-22 02:20:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:27,293 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 956 transitions. [2022-11-22 02:20:27,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-22 02:20:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 956 transitions. [2022-11-22 02:20:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-22 02:20:27,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:27,295 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:27,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-22 02:20:27,296 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:27,296 INFO L85 PathProgramCache]: Analyzing trace with hash 652194887, now seen corresponding path program 1 times [2022-11-22 02:20:27,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:27,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425118852] [2022-11-22 02:20:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:27,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 02:20:27,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:27,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425118852] [2022-11-22 02:20:27,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425118852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:27,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:27,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:20:27,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872409956] [2022-11-22 02:20:27,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:27,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:20:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:20:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:20:27,470 INFO L87 Difference]: Start difference. First operand 786 states and 956 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-22 02:20:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:27,702 INFO L93 Difference]: Finished difference Result 1258 states and 1560 transitions. [2022-11-22 02:20:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:20:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 119 [2022-11-22 02:20:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:27,706 INFO L225 Difference]: With dead ends: 1258 [2022-11-22 02:20:27,706 INFO L226 Difference]: Without dead ends: 774 [2022-11-22 02:20:27,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:20:27,708 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 6 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:27,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 571 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:20:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-22 02:20:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 758. [2022-11-22 02:20:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 555 states have (on average 1.1891891891891893) internal successors, (660), 562 states have internal predecessors, (660), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-22 02:20:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 908 transitions. [2022-11-22 02:20:27,912 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 908 transitions. Word has length 119 [2022-11-22 02:20:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:27,913 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 908 transitions. [2022-11-22 02:20:27,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-22 02:20:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 908 transitions. [2022-11-22 02:20:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-22 02:20:27,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:27,915 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:27,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-22 02:20:27,916 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash 377183108, now seen corresponding path program 1 times [2022-11-22 02:20:27,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171900357] [2022-11-22 02:20:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:27,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-22 02:20:28,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171900357] [2022-11-22 02:20:28,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171900357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144257909] [2022-11-22 02:20:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:28,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:28,275 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:28,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:20:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:20:28,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-22 02:20:28,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-22 02:20:28,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144257909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:28,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484590903] [2022-11-22 02:20:28,679 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-11-22 02:20:28,679 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:20:28,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:20:28,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:20:28,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:20:36,469 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-11-22 02:20:36,578 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:20:36,594 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-22 02:20:36,711 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-11-22 02:20:36,759 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-11-22 02:20:37,188 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 184 for LOIs [2022-11-22 02:20:37,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:36,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66980#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-22 02:21:36,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:36,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:36,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-11-22 02:21:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337102138] [2022-11-22 02:21:36,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:21:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:21:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3709, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 02:21:36,567 INFO L87 Difference]: Start difference. First operand 758 states and 908 transitions. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-22 02:21:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:37,649 INFO L93 Difference]: Finished difference Result 2063 states and 2618 transitions. [2022-11-22 02:21:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:21:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 129 [2022-11-22 02:21:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:37,655 INFO L225 Difference]: With dead ends: 2063 [2022-11-22 02:21:37,655 INFO L226 Difference]: Without dead ends: 1457 [2022-11-22 02:21:37,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 313 SyntacticMatches, 21 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=359, Invalid=4333, Unknown=0, NotChecked=0, Total=4692 [2022-11-22 02:21:37,657 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 679 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:37,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1969 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:21:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-11-22 02:21:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1061. [2022-11-22 02:21:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 777 states have (on average 1.1814671814671815) internal successors, (918), 787 states have internal predecessors, (918), 172 states have call successors, (172), 111 states have call predecessors, (172), 111 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-22 02:21:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1262 transitions. [2022-11-22 02:21:37,914 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1262 transitions. Word has length 129 [2022-11-22 02:21:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:37,915 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1262 transitions. [2022-11-22 02:21:37,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-22 02:21:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1262 transitions. [2022-11-22 02:21:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 02:21:37,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:37,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:37,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:38,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:38,129 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash -766349292, now seen corresponding path program 1 times [2022-11-22 02:21:38,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:38,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942129562] [2022-11-22 02:21:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:38,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-22 02:21:40,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942129562] [2022-11-22 02:21:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942129562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321138958] [2022-11-22 02:21:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:40,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:40,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:40,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:21:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:41,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:21:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:21:41,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-22 02:21:42,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321138958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520842327] [2022-11-22 02:21:42,805 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2022-11-22 02:21:42,805 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:42,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:42,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:42,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:48,180 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 89 for LOIs [2022-11-22 02:21:48,301 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:21:48,317 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 120 for LOIs [2022-11-22 02:21:48,472 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 99 for LOIs [2022-11-22 02:21:48,490 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 121 for LOIs [2022-11-22 02:21:48,606 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 130 for LOIs [2022-11-22 02:21:48,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:22:45,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72015#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~manual_selection_History_2~0 0) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-22 02:22:45,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:22:45,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:45,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-11-22 02:22:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642741953] [2022-11-22 02:22:45,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:22:45,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-22 02:22:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-22 02:22:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1989, Invalid=10001, Unknown=0, NotChecked=0, Total=11990 [2022-11-22 02:22:45,133 INFO L87 Difference]: Start difference. First operand 1061 states and 1262 transitions. Second operand has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-22 02:22:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:52,551 INFO L93 Difference]: Finished difference Result 2756 states and 3613 transitions. [2022-11-22 02:22:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-22 02:22:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 137 [2022-11-22 02:22:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:52,560 INFO L225 Difference]: With dead ends: 2756 [2022-11-22 02:22:52,560 INFO L226 Difference]: Without dead ends: 1889 [2022-11-22 02:22:52,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 321 SyntacticMatches, 18 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 60.0s TimeCoverageRelationStatistics Valid=2461, Invalid=16171, Unknown=0, NotChecked=0, Total=18632 [2022-11-22 02:22:52,565 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 1604 mSDsluCounter, 12361 mSDsCounter, 0 mSdLazyCounter, 5588 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 12818 SdHoareTripleChecker+Invalid, 6065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 5588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:52,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 12818 Invalid, 6065 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [477 Valid, 5588 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-22 02:22:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-11-22 02:22:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1003. [2022-11-22 02:22:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 737 states have (on average 1.2048846675712348) internal successors, (888), 749 states have internal predecessors, (888), 160 states have call successors, (160), 105 states have call predecessors, (160), 105 states have return successors, (160), 148 states have call predecessors, (160), 160 states have call successors, (160) [2022-11-22 02:22:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1208 transitions. [2022-11-22 02:22:52,778 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1208 transitions. Word has length 137 [2022-11-22 02:22:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:52,779 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1208 transitions. [2022-11-22 02:22:52,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-22 02:22:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1208 transitions. [2022-11-22 02:22:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 02:22:52,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:52,780 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 02:22:52,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 02:22:52,981 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash 605221213, now seen corresponding path program 1 times [2022-11-22 02:22:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:52,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002705966] [2022-11-22 02:22:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:52,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 02:22:53,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:53,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002705966] [2022-11-22 02:22:53,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002705966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:53,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749705078] [2022-11-22 02:22:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:53,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:53,757 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:53,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:22:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:53,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:22:53,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 02:22:54,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 02:22:55,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749705078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:22:55,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093727719] [2022-11-22 02:22:55,184 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-11-22 02:22:55,185 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:22:55,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:22:55,185 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:22:55,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:11,825 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 207 for LOIs [2022-11-22 02:23:12,172 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 02:23:12,188 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 96 for LOIs [2022-11-22 02:23:12,274 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 156 for LOIs [2022-11-22 02:23:12,319 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-22 02:23:12,366 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 95 for LOIs [2022-11-22 02:23:12,389 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:24:07,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1093727719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:07,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:24:07,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [9, 10, 9] total 72 [2022-11-22 02:24:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695220700] [2022-11-22 02:24:07,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:07,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 02:24:07,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 02:24:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=4395, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:24:07,593 INFO L87 Difference]: Start difference. First operand 1003 states and 1208 transitions. Second operand has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-22 02:24:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:36,228 INFO L93 Difference]: Finished difference Result 1947 states and 2391 transitions. [2022-11-22 02:24:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-22 02:24:36,229 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 137 [2022-11-22 02:24:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:36,232 INFO L225 Difference]: With dead ends: 1947 [2022-11-22 02:24:36,232 INFO L226 Difference]: Without dead ends: 1211 [2022-11-22 02:24:36,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 328 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 75.4s TimeCoverageRelationStatistics Valid=1020, Invalid=6120, Unknown=0, NotChecked=0, Total=7140 [2022-11-22 02:24:36,235 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 142 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 3212 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 3179 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:36,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 3179 Invalid, 3263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3212 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-22 02:24:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-11-22 02:24:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1161. [2022-11-22 02:24:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 851 states have (on average 1.198589894242068) internal successors, (1020), 864 states have internal predecessors, (1020), 191 states have call successors, (191), 118 states have call predecessors, (191), 118 states have return successors, (191), 178 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-22 02:24:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1402 transitions. [2022-11-22 02:24:36,500 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1402 transitions. Word has length 137 [2022-11-22 02:24:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:36,500 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1402 transitions. [2022-11-22 02:24:36,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-22 02:24:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1402 transitions. [2022-11-22 02:24:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 02:24:36,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:36,502 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:36,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-22 02:24:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:36,708 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1566585149, now seen corresponding path program 1 times [2022-11-22 02:24:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:36,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336444683] [2022-11-22 02:24:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 02:24:37,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:37,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336444683] [2022-11-22 02:24:37,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336444683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:37,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903981784] [2022-11-22 02:24:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:37,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:37,477 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:37,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_437a782e-68a2-4636-8296-16bd215a1aac/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:24:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 02:24:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 02:24:38,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 02:24:38,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903981784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:24:38,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991442185] [2022-11-22 02:24:38,813 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-22 02:24:38,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:24:38,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:24:38,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:24:38,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs