./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 5e519f3a 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_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/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_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI --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-5e519f3 [2022-11-03 03:44:12,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:44:12,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:44:12,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:44:12,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:44:12,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:44:12,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:44:12,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:44:12,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:44:12,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:44:12,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:44:12,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:44:12,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:44:12,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:44:12,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:44:12,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:44:12,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:44:12,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:44:12,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:44:12,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:44:12,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:44:12,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:44:12,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:44:12,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:44:12,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:44:12,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:44:12,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:44:12,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:44:12,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:44:12,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:44:12,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:44:12,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:44:12,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:44:12,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:44:12,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:44:12,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:44:12,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:44:12,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:44:12,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:44:12,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:44:12,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:44:12,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:44:12,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:44:12,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:44:12,528 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:44:12,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:44:12,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:44:12,530 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:44:12,530 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:44:12,530 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:44:12,531 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:44:12,531 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:44:12,532 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:44:12,532 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:44:12,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:44:12,533 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:44:12,533 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:44:12,533 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:44:12,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:44:12,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:44:12,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:44:12,535 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:44:12,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:44:12,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:44:12,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:44:12,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:44:12,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:44:12,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:44:12,538 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:44:12,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:44:12,539 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:44:12,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:44:12,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:44:12,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:44:12,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:44:12,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:44:12,541 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:44:12,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:44:12,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:44:12,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:44:12,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:44:12,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:44:12,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:44:12,542 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_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d [2022-11-03 03:44:12,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:44:12,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:44:12,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:44:12,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:44:12,886 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:44:12,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-03 03:44:12,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/data/af95e98da/16a96a6a744f49d0b37bf7a3690801ae/FLAG65630964e [2022-11-03 03:44:13,558 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:44:13,561 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-03 03:44:13,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/data/af95e98da/16a96a6a744f49d0b37bf7a3690801ae/FLAG65630964e [2022-11-03 03:44:13,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/data/af95e98da/16a96a6a744f49d0b37bf7a3690801ae [2022-11-03 03:44:13,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:44:13,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:44:13,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:44:13,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:44:13,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:44:13,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:13" (1/1) ... [2022-11-03 03:44:13,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f805e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:13, skipping insertion in model container [2022-11-03 03:44:13,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:13" (1/1) ... [2022-11-03 03:44:13,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:44:13,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:44:14,161 WARN L230 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_323bdfbb-16fe-4226-b8bf-40f13c29192e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-03 03:44:14,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:44:14,174 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:44:14,235 WARN L230 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_323bdfbb-16fe-4226-b8bf-40f13c29192e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-03 03:44:14,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:44:14,250 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:44:14,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14 WrapperNode [2022-11-03 03:44:14,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:44:14,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:44:14,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:44:14,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:44:14,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,340 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 533 [2022-11-03 03:44:14,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:44:14,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:44:14,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:44:14,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:44:14,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:44:14,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:44:14,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:44:14,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:44:14,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (1/1) ... [2022-11-03 03:44:14,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:44:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:14,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:44:14,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:44:14,470 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-03 03:44:14,470 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-03 03:44:14,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:44:14,470 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-03 03:44:14,471 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-03 03:44:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-03 03:44:14,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-03 03:44:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-11-03 03:44:14,471 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-11-03 03:44:14,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:44:14,472 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:44:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:44:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-03 03:44:14,472 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-03 03:44:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:44:14,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:44:14,473 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-03 03:44:14,473 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-03 03:44:14,587 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:44:14,589 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:44:15,398 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:44:15,706 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:44:15,707 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:44:15,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:15 BoogieIcfgContainer [2022-11-03 03:44:15,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:44:15,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:44:15,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:44:15,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:44:15,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:44:13" (1/3) ... [2022-11-03 03:44:15,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a690dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:15, skipping insertion in model container [2022-11-03 03:44:15,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:14" (2/3) ... [2022-11-03 03:44:15,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a690dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:15, skipping insertion in model container [2022-11-03 03:44:15,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:15" (3/3) ... [2022-11-03 03:44:15,720 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-03 03:44:15,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:44:15,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:44:15,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:44:15,803 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;@f7e6eab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:44:15,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:44:15,809 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) [2022-11-03 03:44:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:44:15,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:15,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:15,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash -301559937, now seen corresponding path program 1 times [2022-11-03 03:44:15,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:15,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005126983] [2022-11-03 03:44:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:15,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:16,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005126983] [2022-11-03 03:44:16,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005126983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:16,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:16,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:16,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923777718] [2022-11-03 03:44:16,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:16,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:16,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:16,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:16,533 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) [2022-11-03 03:44:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:16,740 INFO L93 Difference]: Finished difference Result 289 states and 469 transitions. [2022-11-03 03:44:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:16,744 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 [2022-11-03 03:44:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:16,757 INFO L225 Difference]: With dead ends: 289 [2022-11-03 03:44:16,757 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 03:44:16,768 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 [2022-11-03 03:44:16,773 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 5 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:16,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 599 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 03:44:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-03 03:44:16,869 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) [2022-11-03 03:44:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2022-11-03 03:44:16,878 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 19 [2022-11-03 03:44:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:16,879 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2022-11-03 03:44:16,881 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) [2022-11-03 03:44:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2022-11-03 03:44:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:44:16,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:16,884 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] [2022-11-03 03:44:16,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:44:16,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash 292308684, now seen corresponding path program 1 times [2022-11-03 03:44:16,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:16,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332868493] [2022-11-03 03:44:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:44:17,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:17,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332868493] [2022-11-03 03:44:17,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332868493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:17,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:17,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:17,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050646823] [2022-11-03 03:44:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:17,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:17,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:17,240 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) [2022-11-03 03:44:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:17,351 INFO L93 Difference]: Finished difference Result 296 states and 447 transitions. [2022-11-03 03:44:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:17,352 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 [2022-11-03 03:44:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:17,357 INFO L225 Difference]: With dead ends: 296 [2022-11-03 03:44:17,357 INFO L226 Difference]: Without dead ends: 152 [2022-11-03 03:44:17,363 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 [2022-11-03 03:44:17,365 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 6 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:17,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 611 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-03 03:44:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-03 03:44:17,388 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) [2022-11-03 03:44:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 226 transitions. [2022-11-03 03:44:17,391 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 226 transitions. Word has length 28 [2022-11-03 03:44:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:17,392 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 226 transitions. [2022-11-03 03:44:17,392 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) [2022-11-03 03:44:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 226 transitions. [2022-11-03 03:44:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:44:17,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:17,395 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] [2022-11-03 03:44:17,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:44:17,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1382943625, now seen corresponding path program 1 times [2022-11-03 03:44:17,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:17,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540429563] [2022-11-03 03:44:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:44:17,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:17,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540429563] [2022-11-03 03:44:17,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540429563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:17,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:17,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:17,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196058346] [2022-11-03 03:44:17,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:17,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:17,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:17,637 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) [2022-11-03 03:44:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:17,735 INFO L93 Difference]: Finished difference Result 306 states and 458 transitions. [2022-11-03 03:44:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:17,736 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 [2022-11-03 03:44:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:17,738 INFO L225 Difference]: With dead ends: 306 [2022-11-03 03:44:17,738 INFO L226 Difference]: Without dead ends: 157 [2022-11-03 03:44:17,741 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 [2022-11-03 03:44:17,747 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 6 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:17,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 597 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-03 03:44:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-03 03:44:17,769 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) [2022-11-03 03:44:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 230 transitions. [2022-11-03 03:44:17,785 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 230 transitions. Word has length 36 [2022-11-03 03:44:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:17,786 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 230 transitions. [2022-11-03 03:44:17,786 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) [2022-11-03 03:44:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 230 transitions. [2022-11-03 03:44:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:44:17,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:17,793 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] [2022-11-03 03:44:17,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:44:17,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:17,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1786441123, now seen corresponding path program 1 times [2022-11-03 03:44:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001084171] [2022-11-03 03:44:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:17,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:44:18,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001084171] [2022-11-03 03:44:18,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001084171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:18,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:18,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032788645] [2022-11-03 03:44:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:18,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:18,066 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) [2022-11-03 03:44:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,156 INFO L93 Difference]: Finished difference Result 316 states and 466 transitions. [2022-11-03 03:44:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:18,157 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 [2022-11-03 03:44:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,166 INFO L225 Difference]: With dead ends: 316 [2022-11-03 03:44:18,166 INFO L226 Difference]: Without dead ends: 162 [2022-11-03 03:44:18,166 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 [2022-11-03 03:44:18,167 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 6 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 597 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-03 03:44:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-03 03:44:18,182 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) [2022-11-03 03:44:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-11-03 03:44:18,183 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 44 [2022-11-03 03:44:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,184 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-11-03 03:44:18,184 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) [2022-11-03 03:44:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-11-03 03:44:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:44:18,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,191 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] [2022-11-03 03:44:18,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:44:18,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash -610018180, now seen corresponding path program 1 times [2022-11-03 03:44:18,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:18,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816988604] [2022-11-03 03:44:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:44:18,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816988604] [2022-11-03 03:44:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816988604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:18,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:18,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143904030] [2022-11-03 03:44:18,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:18,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:18,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:18,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:18,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:18,417 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) [2022-11-03 03:44:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,520 INFO L93 Difference]: Finished difference Result 325 states and 470 transitions. [2022-11-03 03:44:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:18,521 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 [2022-11-03 03:44:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,527 INFO L225 Difference]: With dead ends: 325 [2022-11-03 03:44:18,527 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 03:44:18,528 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 [2022-11-03 03:44:18,529 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 5 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 606 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 03:44:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-03 03:44:18,562 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) [2022-11-03 03:44:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 237 transitions. [2022-11-03 03:44:18,565 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 237 transitions. Word has length 44 [2022-11-03 03:44:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,570 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 237 transitions. [2022-11-03 03:44:18,570 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) [2022-11-03 03:44:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 237 transitions. [2022-11-03 03:44:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 03:44:18,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,576 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] [2022-11-03 03:44:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:44:18,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1818633053, now seen corresponding path program 1 times [2022-11-03 03:44:18,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:18,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820327936] [2022-11-03 03:44:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:44:18,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820327936] [2022-11-03 03:44:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820327936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:18,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:18,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758705987] [2022-11-03 03:44:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:18,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:18,869 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) [2022-11-03 03:44:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,948 INFO L93 Difference]: Finished difference Result 335 states and 479 transitions. [2022-11-03 03:44:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:18,949 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 [2022-11-03 03:44:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,950 INFO L225 Difference]: With dead ends: 335 [2022-11-03 03:44:18,951 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 03:44:18,951 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 [2022-11-03 03:44:18,953 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 608 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 03:44:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-03 03:44:18,969 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) [2022-11-03 03:44:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 242 transitions. [2022-11-03 03:44:18,972 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 242 transitions. Word has length 52 [2022-11-03 03:44:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,973 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 242 transitions. [2022-11-03 03:44:18,973 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) [2022-11-03 03:44:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 242 transitions. [2022-11-03 03:44:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:44:18,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,976 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] [2022-11-03 03:44:18,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:44:18,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1171138832, now seen corresponding path program 1 times [2022-11-03 03:44:18,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:18,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032829766] [2022-11-03 03:44:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:44:19,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:19,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032829766] [2022-11-03 03:44:19,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032829766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:44:19,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019697668] [2022-11-03 03:44:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:19,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:19,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:19,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:19,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:44:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:44:19,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:44:19,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:19,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019697668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:19,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:44:19,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-03 03:44:19,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611227437] [2022-11-03 03:44:19,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:19,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:44:19,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:44:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:44:19,952 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) [2022-11-03 03:44:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:20,341 INFO L93 Difference]: Finished difference Result 510 states and 710 transitions. [2022-11-03 03:44:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:44:20,342 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 [2022-11-03 03:44:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:20,344 INFO L225 Difference]: With dead ends: 510 [2022-11-03 03:44:20,344 INFO L226 Difference]: Without dead ends: 331 [2022-11-03 03:44:20,344 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 [2022-11-03 03:44:20,345 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 201 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:20,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1255 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-03 03:44:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2022-11-03 03:44:20,367 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) [2022-11-03 03:44:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 458 transitions. [2022-11-03 03:44:20,371 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 458 transitions. Word has length 55 [2022-11-03 03:44:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:20,373 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 458 transitions. [2022-11-03 03:44:20,373 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) [2022-11-03 03:44:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 458 transitions. [2022-11-03 03:44:20,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:44:20,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:20,375 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] [2022-11-03 03:44:20,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:20,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:20,603 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:20,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1285468697, now seen corresponding path program 1 times [2022-11-03 03:44:20,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:20,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844725112] [2022-11-03 03:44:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:20,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:44:21,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:21,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844725112] [2022-11-03 03:44:21,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844725112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:44:21,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205326049] [2022-11-03 03:44:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:21,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:21,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:21,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:21,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:44:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:21,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:44:21,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:21,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:44:21,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205326049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:21,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404501981] [2022-11-03 03:44:21,922 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 03:44:21,922 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:44:21,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:44:21,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:44:21,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:44:28,944 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 03:44:29,349 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:44:29,359 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 03:44:29,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:44:48,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [404501981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:48,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:44:48,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-03 03:44:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290110395] [2022-11-03 03:44:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:48,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:44:48,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:44:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:44:48,123 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) [2022-11-03 03:44:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:53,026 INFO L93 Difference]: Finished difference Result 760 states and 1082 transitions. [2022-11-03 03:44:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:44:53,027 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 [2022-11-03 03:44:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:53,031 INFO L225 Difference]: With dead ends: 760 [2022-11-03 03:44:53,031 INFO L226 Difference]: Without dead ends: 436 [2022-11-03 03:44:53,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:44:53,033 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 161 mSDsluCounter, 3098 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 3384 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:53,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 3384 Invalid, 1921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 1547 Invalid, 0 Unknown, 341 Unchecked, 3.6s Time] [2022-11-03 03:44:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-03 03:44:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 393. [2022-11-03 03:44:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 288 states have (on average 1.3888888888888888) internal successors, (400), 289 states have internal predecessors, (400), 75 states have call successors, (75), 29 states have call predecessors, (75), 29 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-03 03:44:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 550 transitions. [2022-11-03 03:44:53,083 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 550 transitions. Word has length 57 [2022-11-03 03:44:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:53,084 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 550 transitions. [2022-11-03 03:44:53,084 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) [2022-11-03 03:44:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 550 transitions. [2022-11-03 03:44:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:44:53,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:53,086 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] [2022-11-03 03:44:53,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 03:44:53,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:44:53,306 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:53,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1181010267, now seen corresponding path program 1 times [2022-11-03 03:44:53,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:53,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708697829] [2022-11-03 03:44:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:53,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:44:53,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708697829] [2022-11-03 03:44:53,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708697829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:44:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398617704] [2022-11-03 03:44:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:53,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:53,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:53,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:44:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:44:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:54,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:44:54,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398617704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254402156] [2022-11-03 03:44:54,321 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 03:44:54,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:44:54,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:44:54,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:44:54,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:44:57,015 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2022-11-03 03:44:57,130 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:44:57,144 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 03:44:57,195 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:45:11,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [254402156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:11,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:45:11,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-03 03:45:11,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076662420] [2022-11-03 03:45:11,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:11,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:45:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:45:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:45:11,483 INFO L87 Difference]: Start difference. First operand 393 states and 550 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) [2022-11-03 03:45:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:18,802 INFO L93 Difference]: Finished difference Result 804 states and 1133 transitions. [2022-11-03 03:45:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:45:18,803 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 [2022-11-03 03:45:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:18,806 INFO L225 Difference]: With dead ends: 804 [2022-11-03 03:45:18,806 INFO L226 Difference]: Without dead ends: 480 [2022-11-03 03:45:18,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:45:18,808 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 135 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 2769 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:18,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 2769 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 03:45:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-03 03:45:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 457. [2022-11-03 03:45:18,888 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) [2022-11-03 03:45:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 637 transitions. [2022-11-03 03:45:18,892 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 637 transitions. Word has length 57 [2022-11-03 03:45:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:18,892 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 637 transitions. [2022-11-03 03:45:18,893 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) [2022-11-03 03:45:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 637 transitions. [2022-11-03 03:45:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 03:45:18,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:18,894 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] [2022-11-03 03:45:18,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:19,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 03:45:19,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:19,111 INFO L85 PathProgramCache]: Analyzing trace with hash -251167164, now seen corresponding path program 1 times [2022-11-03 03:45:19,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:19,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29214303] [2022-11-03 03:45:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:19,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:45:19,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:19,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29214303] [2022-11-03 03:45:19,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29214303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:19,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204553131] [2022-11-03 03:45:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:19,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:19,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:19,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:45:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:45:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:19,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:45:20,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204553131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:20,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978351679] [2022-11-03 03:45:20,068 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 03:45:20,068 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:45:20,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:45:20,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:45:20,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:45:38,678 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 185 for LOIs [2022-11-03 03:45:41,817 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:45:41,831 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 03:45:41,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:46:01,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1978351679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:01,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:46:01,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-03 03:46:01,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984254422] [2022-11-03 03:46:01,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:01,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:46:01,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:46:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:46:01,309 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) [2022-11-03 03:46:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:11,056 INFO L93 Difference]: Finished difference Result 866 states and 1221 transitions. [2022-11-03 03:46:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:46:11,057 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 [2022-11-03 03:46:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:11,060 INFO L225 Difference]: With dead ends: 866 [2022-11-03 03:46:11,060 INFO L226 Difference]: Without dead ends: 542 [2022-11-03 03:46:11,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 03:46:11,062 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 142 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 3856 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:11,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 3856 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 03:46:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-03 03:46:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 493. [2022-11-03 03:46:11,163 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) [2022-11-03 03:46:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 681 transitions. [2022-11-03 03:46:11,166 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 681 transitions. Word has length 59 [2022-11-03 03:46:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:11,167 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 681 transitions. [2022-11-03 03:46:11,167 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) [2022-11-03 03:46:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 681 transitions. [2022-11-03 03:46:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:46:11,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:11,169 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] [2022-11-03 03:46:11,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:11,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:11,386 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash -800403589, now seen corresponding path program 1 times [2022-11-03 03:46:11,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:11,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918608788] [2022-11-03 03:46:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:46:11,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:11,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918608788] [2022-11-03 03:46:11,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918608788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:11,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:11,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988116150] [2022-11-03 03:46:11,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:11,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:11,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:11,575 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) [2022-11-03 03:46:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:11,730 INFO L93 Difference]: Finished difference Result 893 states and 1255 transitions. [2022-11-03 03:46:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:11,731 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 [2022-11-03 03:46:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:11,734 INFO L225 Difference]: With dead ends: 893 [2022-11-03 03:46:11,734 INFO L226 Difference]: Without dead ends: 501 [2022-11-03 03:46:11,736 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 [2022-11-03 03:46:11,737 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 5 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:11,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 606 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:46:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-03 03:46:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-03 03:46:11,842 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) [2022-11-03 03:46:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 687 transitions. [2022-11-03 03:46:11,845 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 687 transitions. Word has length 61 [2022-11-03 03:46:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:11,845 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 687 transitions. [2022-11-03 03:46:11,846 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) [2022-11-03 03:46:11,846 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 687 transitions. [2022-11-03 03:46:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:46:11,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:11,847 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] [2022-11-03 03:46:11,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:46:11,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash 328701673, now seen corresponding path program 1 times [2022-11-03 03:46:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:11,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429523202] [2022-11-03 03:46:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:46:12,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429523202] [2022-11-03 03:46:12,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429523202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:46:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899487651] [2022-11-03 03:46:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:12,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:12,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:12,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:12,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:46:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:12,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:46:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:12,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:46:12,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899487651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:12,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921041497] [2022-11-03 03:46:12,826 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2022-11-03 03:46:12,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:46:12,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:46:12,827 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:46:12,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:46:19,532 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 73 for LOIs [2022-11-03 03:46:19,555 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:46:19,569 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 03:46:19,618 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 111 for LOIs [2022-11-03 03:46:19,658 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 115 for LOIs [2022-11-03 03:46:19,700 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 03:46:19,741 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:46:59,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13549#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= ~s1p~0 0) (<= ~cs2~0 0) (<= 0 |#NULL.base|) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= 0 (+ ~s2s2_new~0 1)) (<= ~s2s1~0 0) (<= ~s2s2~0 0) (<= 0 (+ ~s2s1_new~0 1)) (<= (+ ~s1p_new~0 1) 0) (<= 0 ~s1s1~0) (<= 0 ~cs2~0) (<= 1 ~side1_written~0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~s1s2~0 0) (<= 0 ~s2p~0) (<= ~s2p~0 0) (<= 0 ~cs1~0) (<= 0 ~s1p~0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= (+ ~side2_written~0 1) 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (not (= (mod ~side1Failed_History_1~0 256) 0)) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~cs1~0 0) (<= 0 ~s2s2~0) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (<= |#NULL.base| 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= ~manual_selection_History_2~0 0) (<= 0 ~s1s2~0) (<= ~s1s1~0 0) (<= 0 ~s2s1~0) (<= 0 |#NULL.offset|) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0))' at error location [2022-11-03 03:46:59,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:46:59,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:46:59,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-03 03:46:59,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691227930] [2022-11-03 03:46:59,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:46:59,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:46:59,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:46:59,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2602, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 03:46:59,649 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) [2022-11-03 03:47:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:00,377 INFO L93 Difference]: Finished difference Result 1221 states and 1699 transitions. [2022-11-03 03:47:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:47:00,377 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 [2022-11-03 03:47:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:00,382 INFO L225 Difference]: With dead ends: 1221 [2022-11-03 03:47:00,383 INFO L226 Difference]: Without dead ends: 837 [2022-11-03 03:47:00,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 141 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=286, Invalid=3136, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 03:47:00,386 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 297 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 3042 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-03 03:47:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 529. [2022-11-03 03:47:00,514 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) [2022-11-03 03:47:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 698 transitions. [2022-11-03 03:47:00,517 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 698 transitions. Word has length 65 [2022-11-03 03:47:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:00,518 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 698 transitions. [2022-11-03 03:47:00,518 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) [2022-11-03 03:47:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 698 transitions. [2022-11-03 03:47:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:47:00,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:00,519 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] [2022-11-03 03:47:00,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:00,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:47:00,733 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:00,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1467150895, now seen corresponding path program 1 times [2022-11-03 03:47:00,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:00,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87154510] [2022-11-03 03:47:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:00,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:47:01,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:01,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87154510] [2022-11-03 03:47:01,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87154510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:01,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:01,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:47:01,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750483924] [2022-11-03 03:47:01,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:01,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:47:01,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:01,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:47:01,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:01,071 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) [2022-11-03 03:47:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:01,934 INFO L93 Difference]: Finished difference Result 1167 states and 1611 transitions. [2022-11-03 03:47:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:01,934 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 [2022-11-03 03:47:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:01,939 INFO L225 Difference]: With dead ends: 1167 [2022-11-03 03:47:01,939 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 03:47:01,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:47:01,941 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 531 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:01,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 2198 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:47:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 03:47:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 657. [2022-11-03 03:47:02,064 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) [2022-11-03 03:47:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 864 transitions. [2022-11-03 03:47:02,067 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 864 transitions. Word has length 66 [2022-11-03 03:47:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:02,067 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 864 transitions. [2022-11-03 03:47:02,068 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) [2022-11-03 03:47:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 864 transitions. [2022-11-03 03:47:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 03:47:02,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:02,070 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] [2022-11-03 03:47:02,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:47:02,070 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:02,071 INFO L85 PathProgramCache]: Analyzing trace with hash 808727846, now seen corresponding path program 1 times [2022-11-03 03:47:02,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:02,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246528561] [2022-11-03 03:47:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:02,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:47:02,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:02,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246528561] [2022-11-03 03:47:02,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246528561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:02,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:02,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:47:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340304477] [2022-11-03 03:47:02,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:02,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:47:02,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:47:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:02,350 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) [2022-11-03 03:47:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:03,253 INFO L93 Difference]: Finished difference Result 1524 states and 2101 transitions. [2022-11-03 03:47:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:03,253 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 [2022-11-03 03:47:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:03,259 INFO L225 Difference]: With dead ends: 1524 [2022-11-03 03:47:03,259 INFO L226 Difference]: Without dead ends: 1194 [2022-11-03 03:47:03,260 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 [2022-11-03 03:47:03,261 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 834 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:03,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1440 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:47:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-03 03:47:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 919. [2022-11-03 03:47:03,436 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) [2022-11-03 03:47:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1215 transitions. [2022-11-03 03:47:03,441 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1215 transitions. Word has length 68 [2022-11-03 03:47:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:03,441 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1215 transitions. [2022-11-03 03:47:03,441 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) [2022-11-03 03:47:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1215 transitions. [2022-11-03 03:47:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:47:03,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:03,443 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] [2022-11-03 03:47:03,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:47:03,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1785323591, now seen corresponding path program 1 times [2022-11-03 03:47:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417094271] [2022-11-03 03:47:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:03,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:47:03,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417094271] [2022-11-03 03:47:03,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417094271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:03,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952470129] [2022-11-03 03:47:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:03,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:03,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:03,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:03,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:47:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:03,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:47:03,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:04,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:47:04,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952470129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488974391] [2022-11-03 03:47:04,196 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-03 03:47:04,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:47:04,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:47:04,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:47:04,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:47:09,179 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 03:47:09,566 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:47:09,576 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 03:47:09,670 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 03:47:09,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:47:38,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [488974391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:38,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:47:38,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-11-03 03:47:38,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854892021] [2022-11-03 03:47:38,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:38,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:47:38,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:38,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:47:38,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 03:47:38,491 INFO L87 Difference]: Start difference. First operand 919 states and 1215 transitions. Second operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 03:47:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:45,980 INFO L93 Difference]: Finished difference Result 1541 states and 2065 transitions. [2022-11-03 03:47:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 03:47:45,987 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 72 [2022-11-03 03:47:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:45,994 INFO L225 Difference]: With dead ends: 1541 [2022-11-03 03:47:45,994 INFO L226 Difference]: Without dead ends: 958 [2022-11-03 03:47:46,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 170 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 03:47:46,001 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 270 mSDsluCounter, 2628 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2852 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:46,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 2852 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2160 Invalid, 0 Unknown, 236 Unchecked, 5.3s Time] [2022-11-03 03:47:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-03 03:47:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 922. [2022-11-03 03:47:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 666 states have (on average 1.3198198198198199) internal successors, (879), 671 states have internal predecessors, (879), 170 states have call successors, (170), 85 states have call predecessors, (170), 85 states have return successors, (170), 165 states have call predecessors, (170), 170 states have call successors, (170) [2022-11-03 03:47:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1219 transitions. [2022-11-03 03:47:46,169 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1219 transitions. Word has length 72 [2022-11-03 03:47:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:46,170 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1219 transitions. [2022-11-03 03:47:46,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 03:47:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1219 transitions. [2022-11-03 03:47:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:47:46,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:46,172 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] [2022-11-03 03:47:46,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:46,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:47:46,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 778968261, now seen corresponding path program 1 times [2022-11-03 03:47:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988419001] [2022-11-03 03:47:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:47:46,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988419001] [2022-11-03 03:47:46,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988419001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804057135] [2022-11-03 03:47:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:46,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:46,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:46,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:47:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:47:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:47,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:47:47,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804057135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:47,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666637933] [2022-11-03 03:47:47,194 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-03 03:47:47,194 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:47:47,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:47:47,195 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:47:47,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:47:50,064 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2022-11-03 03:47:50,149 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:47:50,158 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 03:47:50,251 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 03:47:50,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:48:16,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [666637933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:16,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:48:16,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-11-03 03:48:16,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125528014] [2022-11-03 03:48:16,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:48:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:48:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 03:48:16,042 INFO L87 Difference]: Start difference. First operand 922 states and 1219 transitions. Second operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 03:48:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:35,490 INFO L93 Difference]: Finished difference Result 1491 states and 1988 transitions. [2022-11-03 03:48:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 03:48:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 72 [2022-11-03 03:48:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:35,496 INFO L225 Difference]: With dead ends: 1491 [2022-11-03 03:48:35,497 INFO L226 Difference]: Without dead ends: 908 [2022-11-03 03:48:35,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 170 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 03:48:35,500 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 92 mSDsluCounter, 4075 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 4307 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:35,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 4307 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2750 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-03 03:48:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-03 03:48:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-11-03 03:48:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 656 states have (on average 1.3185975609756098) internal successors, (865), 661 states have internal predecessors, (865), 167 states have call successors, (167), 84 states have call predecessors, (167), 84 states have return successors, (167), 162 states have call predecessors, (167), 167 states have call successors, (167) [2022-11-03 03:48:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1199 transitions. [2022-11-03 03:48:35,696 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1199 transitions. Word has length 72 [2022-11-03 03:48:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:35,697 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1199 transitions. [2022-11-03 03:48:35,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 03:48:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1199 transitions. [2022-11-03 03:48:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 03:48:35,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:35,699 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, 1, 1] [2022-11-03 03:48:35,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:35,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:35,928 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1991255876, now seen corresponding path program 1 times [2022-11-03 03:48:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920273505] [2022-11-03 03:48:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:35,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:48:36,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:36,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920273505] [2022-11-03 03:48:36,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920273505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:36,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289275394] [2022-11-03 03:48:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:36,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:36,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:36,407 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:36,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:48:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:48:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:48:36,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:48:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289275394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785813507] [2022-11-03 03:48:36,883 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-03 03:48:36,883 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:48:36,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:48:36,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:48:36,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:48:56,237 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 204 for LOIs [2022-11-03 03:48:59,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:48:59,804 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 113 for LOIs [2022-11-03 03:49:00,103 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 03:49:00,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:37,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [785813507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:37,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:49:37,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [8, 9, 9] total 49 [2022-11-03 03:49:37,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381595165] [2022-11-03 03:49:37,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:37,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:49:37,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:37,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:49:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 03:49:37,089 INFO L87 Difference]: Start difference. First operand 908 states and 1199 transitions. Second operand has 38 states, 32 states have (on average 1.40625) internal successors, (45), 26 states have internal predecessors, (45), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 03:50:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:00,154 INFO L93 Difference]: Finished difference Result 1530 states and 2049 transitions. [2022-11-03 03:50:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 03:50:00,159 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.40625) internal successors, (45), 26 states have internal predecessors, (45), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 74 [2022-11-03 03:50:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:00,163 INFO L225 Difference]: With dead ends: 1530 [2022-11-03 03:50:00,163 INFO L226 Difference]: Without dead ends: 947 [2022-11-03 03:50:00,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=343, Invalid=3317, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 03:50:00,166 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 282 mSDsluCounter, 5097 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 5394 SdHoareTripleChecker+Invalid, 3860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:00,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 5394 Invalid, 3860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [119 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-03 03:50:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-11-03 03:50:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 911. [2022-11-03 03:50:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 658 states have (on average 1.317629179331307) internal successors, (867), 663 states have internal predecessors, (867), 168 states have call successors, (168), 84 states have call predecessors, (168), 84 states have return successors, (168), 163 states have call predecessors, (168), 168 states have call successors, (168) [2022-11-03 03:50:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1203 transitions. [2022-11-03 03:50:00,374 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1203 transitions. Word has length 74 [2022-11-03 03:50:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:00,374 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1203 transitions. [2022-11-03 03:50:00,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.40625) internal successors, (45), 26 states have internal predecessors, (45), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 03:50:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1203 transitions. [2022-11-03 03:50:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 03:50:00,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:00,378 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] [2022-11-03 03:50:00,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 03:50:00,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:50:00,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1787309115, now seen corresponding path program 1 times [2022-11-03 03:50:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:00,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293205404] [2022-11-03 03:50:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:50:00,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293205404] [2022-11-03 03:50:00,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293205404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:00,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:00,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:50:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296695451] [2022-11-03 03:50:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:00,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:50:00,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:50:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:50:00,792 INFO L87 Difference]: Start difference. First operand 911 states and 1203 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) [2022-11-03 03:50:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:01,165 INFO L93 Difference]: Finished difference Result 1200 states and 1657 transitions. [2022-11-03 03:50:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:01,165 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 [2022-11-03 03:50:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:01,170 INFO L225 Difference]: With dead ends: 1200 [2022-11-03 03:50:01,170 INFO L226 Difference]: Without dead ends: 1198 [2022-11-03 03:50:01,171 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 [2022-11-03 03:50:01,172 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 153 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:01,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1457 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-11-03 03:50:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 919. [2022-11-03 03:50:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 662 states have (on average 1.3157099697885197) internal successors, (871), 669 states have internal predecessors, (871), 170 states have call successors, (170), 86 states have call predecessors, (170), 86 states have return successors, (170), 163 states have call predecessors, (170), 170 states have call successors, (170) [2022-11-03 03:50:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1211 transitions. [2022-11-03 03:50:01,396 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1211 transitions. Word has length 75 [2022-11-03 03:50:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:01,397 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1211 transitions. [2022-11-03 03:50:01,397 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) [2022-11-03 03:50:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1211 transitions. [2022-11-03 03:50:01,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 03:50:01,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:01,399 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] [2022-11-03 03:50:01,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 03:50:01,399 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -928936137, now seen corresponding path program 1 times [2022-11-03 03:50:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741436291] [2022-11-03 03:50:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:50:01,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:01,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741436291] [2022-11-03 03:50:01,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741436291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:01,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:01,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337483236] [2022-11-03 03:50:01,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:01,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:01,629 INFO L87 Difference]: Start difference. First operand 919 states and 1211 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) [2022-11-03 03:50:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:01,867 INFO L93 Difference]: Finished difference Result 1585 states and 2099 transitions. [2022-11-03 03:50:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:50:01,867 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 [2022-11-03 03:50:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:01,871 INFO L225 Difference]: With dead ends: 1585 [2022-11-03 03:50:01,872 INFO L226 Difference]: Without dead ends: 907 [2022-11-03 03:50:01,874 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 [2022-11-03 03:50:01,874 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:01,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 598 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-11-03 03:50:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-11-03 03:50:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 656 states have (on average 1.291158536585366) internal successors, (847), 663 states have internal predecessors, (847), 164 states have call successors, (164), 86 states have call predecessors, (164), 86 states have return successors, (164), 157 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-03 03:50:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1175 transitions. [2022-11-03 03:50:02,081 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1175 transitions. Word has length 78 [2022-11-03 03:50:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:02,082 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1175 transitions. [2022-11-03 03:50:02,082 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) [2022-11-03 03:50:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1175 transitions. [2022-11-03 03:50:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:02,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:02,084 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] [2022-11-03 03:50:02,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 03:50:02,084 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1500524137, now seen corresponding path program 1 times [2022-11-03 03:50:02,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:02,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078150801] [2022-11-03 03:50:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:50:02,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:02,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078150801] [2022-11-03 03:50:02,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078150801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:02,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:02,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:50:02,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577506496] [2022-11-03 03:50:02,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:02,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:50:02,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:02,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:50:02,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:02,441 INFO L87 Difference]: Start difference. First operand 907 states and 1175 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:50:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:03,503 INFO L93 Difference]: Finished difference Result 2773 states and 3849 transitions. [2022-11-03 03:50:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:50:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 80 [2022-11-03 03:50:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:03,513 INFO L225 Difference]: With dead ends: 2773 [2022-11-03 03:50:03,513 INFO L226 Difference]: Without dead ends: 2086 [2022-11-03 03:50:03,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:50:03,517 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 504 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:03,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1939 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:50:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2022-11-03 03:50:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1107. [2022-11-03 03:50:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 800 states have (on average 1.29) internal successors, (1032), 809 states have internal predecessors, (1032), 200 states have call successors, (200), 106 states have call predecessors, (200), 106 states have return successors, (200), 191 states have call predecessors, (200), 200 states have call successors, (200) [2022-11-03 03:50:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1432 transitions. [2022-11-03 03:50:03,804 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1432 transitions. Word has length 80 [2022-11-03 03:50:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:03,804 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 1432 transitions. [2022-11-03 03:50:03,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:50:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1432 transitions. [2022-11-03 03:50:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:03,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:03,807 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] [2022-11-03 03:50:03,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 03:50:03,807 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash 438889773, now seen corresponding path program 1 times [2022-11-03 03:50:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:03,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386870151] [2022-11-03 03:50:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:50:04,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386870151] [2022-11-03 03:50:04,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386870151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:50:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230457343] [2022-11-03 03:50:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:04,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:04,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:04,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:50:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:50:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:50:04,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:04,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230457343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:04,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:50:04,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2022-11-03 03:50:04,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246650355] [2022-11-03 03:50:04,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:04,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:50:04,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:50:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:50:04,287 INFO L87 Difference]: Start difference. First operand 1107 states and 1432 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:50:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:05,134 INFO L93 Difference]: Finished difference Result 2052 states and 2716 transitions. [2022-11-03 03:50:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:50:05,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 80 [2022-11-03 03:50:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:05,141 INFO L225 Difference]: With dead ends: 2052 [2022-11-03 03:50:05,141 INFO L226 Difference]: Without dead ends: 1281 [2022-11-03 03:50:05,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:05,144 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 617 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:05,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1089 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:50:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-11-03 03:50:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1101. [2022-11-03 03:50:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 796 states have (on average 1.2864321608040201) internal successors, (1024), 805 states have internal predecessors, (1024), 198 states have call successors, (198), 106 states have call predecessors, (198), 106 states have return successors, (198), 189 states have call predecessors, (198), 198 states have call successors, (198) [2022-11-03 03:50:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1420 transitions. [2022-11-03 03:50:05,455 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1420 transitions. Word has length 80 [2022-11-03 03:50:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:05,455 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1420 transitions. [2022-11-03 03:50:05,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:50:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1420 transitions. [2022-11-03 03:50:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:05,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:05,456 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] [2022-11-03 03:50:05,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:05,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:05,657 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1646277717, now seen corresponding path program 1 times [2022-11-03 03:50:05,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:05,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18836738] [2022-11-03 03:50:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:05,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:50:06,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:06,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18836738] [2022-11-03 03:50:06,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18836738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:50:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142884419] [2022-11-03 03:50:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:06,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:06,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:06,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:50:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:50:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:50:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:50:06,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142884419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:06,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539345563] [2022-11-03 03:50:06,975 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-03 03:50:06,976 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:50:06,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:50:06,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:50:06,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:50:10,630 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 73 for LOIs [2022-11-03 03:50:10,652 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:50:10,665 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 03:50:10,770 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 115 for LOIs [2022-11-03 03:50:10,798 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 111 for LOIs [2022-11-03 03:50:10,833 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 03:50:10,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:50:54,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48805#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= ~s1p~0 0) (<= ~cs2~0 0) (<= 0 |#NULL.base|) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= 0 (+ ~s2s2_new~0 1)) (<= ~s2s1~0 0) (<= ~s2s2~0 0) (<= 0 (+ ~s2s1_new~0 1)) (<= (+ ~s1p_new~0 1) 0) (<= 0 ~s1s1~0) (<= 0 ~cs2~0) (<= ~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) (<= ~s1s2~0 0) (<= 0 ~s2p~0) (<= ~s2p~0 0) (<= 0 ~cs1~0) (<= 0 ~s1p~0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 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) (<= ~cs1~0 0) (<= 0 ~s2s2~0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (<= (+ ~nomsg~0 1) 0) (<= |#NULL.base| 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 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 ~s1s2~0) (<= ~s1s1~0 0) (<= 0 ~s2s1~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~cs2_new~0 1)) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (<= (+ ~s2s2_new~0 1) 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0))' at error location [2022-11-03 03:50:54,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:50:54,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:50:54,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-11-03 03:50:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762847955] [2022-11-03 03:50:54,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:54,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:50:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:50:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 03:50:54,022 INFO L87 Difference]: Start difference. First operand 1101 states and 1420 transitions. Second operand has 20 states, 15 states have (on average 5.733333333333333) internal successors, (86), 18 states have internal predecessors, (86), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-11-03 03:50:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:55,695 INFO L93 Difference]: Finished difference Result 2639 states and 3608 transitions. [2022-11-03 03:50:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:50:55,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 5.733333333333333) internal successors, (86), 18 states have internal predecessors, (86), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 80 [2022-11-03 03:50:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:55,707 INFO L225 Difference]: With dead ends: 2639 [2022-11-03 03:50:55,707 INFO L226 Difference]: Without dead ends: 1710 [2022-11-03 03:50:55,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 174 SyntacticMatches, 13 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=462, Invalid=4940, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 03:50:55,711 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 567 mSDsluCounter, 5096 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 5234 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:55,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 5234 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:50:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-11-03 03:50:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1069. [2022-11-03 03:50:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 773 states have (on average 1.279430789133247) internal successors, (989), 782 states have internal predecessors, (989), 190 states have call successors, (190), 105 states have call predecessors, (190), 105 states have return successors, (190), 181 states have call predecessors, (190), 190 states have call successors, (190) [2022-11-03 03:50:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1369 transitions. [2022-11-03 03:50:56,024 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1369 transitions. Word has length 80 [2022-11-03 03:50:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:56,024 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1369 transitions. [2022-11-03 03:50:56,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 5.733333333333333) internal successors, (86), 18 states have internal predecessors, (86), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-11-03 03:50:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1369 transitions. [2022-11-03 03:50:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 03:50:56,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:56,026 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] [2022-11-03 03:50:56,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:56,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:56,246 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:56,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash -598694628, now seen corresponding path program 1 times [2022-11-03 03:50:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:56,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092623984] [2022-11-03 03:50:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:50:56,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092623984] [2022-11-03 03:50:56,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092623984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:50:56,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018038173] [2022-11-03 03:50:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:56,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:56,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:56,599 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:56,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:50:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:50:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:50:56,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:50:57,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018038173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:57,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422496229] [2022-11-03 03:50:57,023 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-03 03:50:57,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:50:57,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:50:57,024 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:50:57,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:51:02,281 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 03:51:02,705 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:51:02,716 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 03:51:02,805 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 126 for LOIs [2022-11-03 03:51:03,106 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 03:51:03,137 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:51:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1422496229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:47,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:51:47,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [8, 9, 9] total 57 [2022-11-03 03:51:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543048545] [2022-11-03 03:51:47,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:47,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 03:51:47,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 03:51:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2879, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 03:51:47,965 INFO L87 Difference]: Start difference. First operand 1069 states and 1369 transitions. Second operand has 46 states, 38 states have (on average 1.263157894736842) internal successors, (48), 31 states have internal predecessors, (48), 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) [2022-11-03 03:51:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:56,349 INFO L93 Difference]: Finished difference Result 1781 states and 2304 transitions. [2022-11-03 03:51:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 03:51:56,349 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 1.263157894736842) internal successors, (48), 31 states have internal predecessors, (48), 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 87 [2022-11-03 03:51:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:56,353 INFO L225 Difference]: With dead ends: 1781 [2022-11-03 03:51:56,353 INFO L226 Difference]: Without dead ends: 1107 [2022-11-03 03:51:56,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 205 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=330, Invalid=3092, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 03:51:56,356 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 176 mSDsluCounter, 3568 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 3774 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:56,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 3774 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2601 Invalid, 0 Unknown, 374 Unchecked, 6.1s Time] [2022-11-03 03:51:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-11-03 03:51:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1059. [2022-11-03 03:51:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 766 states have (on average 1.276762402088773) internal successors, (978), 775 states have internal predecessors, (978), 187 states have call successors, (187), 105 states have call predecessors, (187), 105 states have return successors, (187), 178 states have call predecessors, (187), 187 states have call successors, (187) [2022-11-03 03:51:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1352 transitions. [2022-11-03 03:51:56,602 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1352 transitions. Word has length 87 [2022-11-03 03:51:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:56,602 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1352 transitions. [2022-11-03 03:51:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 1.263157894736842) internal successors, (48), 31 states have internal predecessors, (48), 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) [2022-11-03 03:51:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1352 transitions. [2022-11-03 03:51:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 03:51:56,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:56,604 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] [2022-11-03 03:51:56,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:56,818 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2071873319, now seen corresponding path program 1 times [2022-11-03 03:51:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:56,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955942503] [2022-11-03 03:51:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:51:56,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955942503] [2022-11-03 03:51:56,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955942503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:56,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:56,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335958466] [2022-11-03 03:51:56,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:56,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:56,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:56,992 INFO L87 Difference]: Start difference. First operand 1059 states and 1352 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) [2022-11-03 03:51:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:57,320 INFO L93 Difference]: Finished difference Result 1836 states and 2363 transitions. [2022-11-03 03:51:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:51:57,321 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 [2022-11-03 03:51:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:57,325 INFO L225 Difference]: With dead ends: 1836 [2022-11-03 03:51:57,325 INFO L226 Difference]: Without dead ends: 1043 [2022-11-03 03:51:57,327 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 [2022-11-03 03:51:57,328 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 7 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:57,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 580 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-11-03 03:51:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2022-11-03 03:51:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 758 states have (on average 1.2480211081794195) internal successors, (946), 767 states have internal predecessors, (946), 179 states have call successors, (179), 105 states have call predecessors, (179), 105 states have return successors, (179), 170 states have call predecessors, (179), 179 states have call successors, (179) [2022-11-03 03:51:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1304 transitions. [2022-11-03 03:51:57,622 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1304 transitions. Word has length 87 [2022-11-03 03:51:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:57,622 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1304 transitions. [2022-11-03 03:51:57,622 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) [2022-11-03 03:51:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1304 transitions. [2022-11-03 03:51:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 03:51:57,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:57,624 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] [2022-11-03 03:51:57,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 03:51:57,625 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash -580512761, now seen corresponding path program 1 times [2022-11-03 03:51:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:57,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383748903] [2022-11-03 03:51:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:57,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:51:57,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:57,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383748903] [2022-11-03 03:51:57,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383748903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:51:57,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44825379] [2022-11-03 03:51:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:57,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:57,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:57,944 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:57,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:51:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:58,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:51:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:51:58,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:51:58,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44825379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201953505] [2022-11-03 03:51:58,377 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-03 03:51:58,377 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:51:58,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:51:58,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:51:58,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:52:20,350 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 204 for LOIs [2022-11-03 03:52:24,856 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:52:24,866 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 113 for LOIs [2022-11-03 03:52:25,263 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 129 for LOIs [2022-11-03 03:52:25,672 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 03:52:25,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:53:23,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1201953505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:23,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:53:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 9, 9] total 59 [2022-11-03 03:53:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178439443] [2022-11-03 03:53:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:23,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:53:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:53:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3106, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 03:53:23,403 INFO L87 Difference]: Start difference. First operand 1043 states and 1304 transitions. Second operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 33 states have internal predecessors, (50), 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) [2022-11-03 03:54:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:02,745 INFO L93 Difference]: Finished difference Result 1788 states and 2276 transitions. [2022-11-03 03:54:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 03:54:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 40 states have (on average 1.25) internal successors, (50), 33 states have internal predecessors, (50), 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 89 [2022-11-03 03:54:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:02,752 INFO L225 Difference]: With dead ends: 1788 [2022-11-03 03:54:02,752 INFO L226 Difference]: Without dead ends: 1124 [2022-11-03 03:54:02,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 212 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 83.0s TimeCoverageRelationStatistics Valid=614, Invalid=5238, Unknown=0, NotChecked=0, Total=5852 [2022-11-03 03:54:02,756 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 296 mSDsluCounter, 5366 mSDsCounter, 0 mSdLazyCounter, 4586 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 5651 SdHoareTripleChecker+Invalid, 4745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 4586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:02,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 5651 Invalid, 4745 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [159 Valid, 4586 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-11-03 03:54:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-03 03:54:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1046. [2022-11-03 03:54:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 760 states have (on average 1.2473684210526317) internal successors, (948), 769 states have internal predecessors, (948), 180 states have call successors, (180), 105 states have call predecessors, (180), 105 states have return successors, (180), 171 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-03 03:54:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1308 transitions. [2022-11-03 03:54:03,159 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1308 transitions. Word has length 89 [2022-11-03 03:54:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:03,160 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 1308 transitions. [2022-11-03 03:54:03,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 40 states have (on average 1.25) internal successors, (50), 33 states have internal predecessors, (50), 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) [2022-11-03 03:54:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1308 transitions. [2022-11-03 03:54:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 03:54:03,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:03,164 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] [2022-11-03 03:54:03,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:03,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 03:54:03,382 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash 727021012, now seen corresponding path program 1 times [2022-11-03 03:54:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:03,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349921421] [2022-11-03 03:54:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:03,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:54:03,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349921421] [2022-11-03 03:54:03,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349921421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519689199] [2022-11-03 03:54:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:03,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:03,872 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:03,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:54:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:54:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:54:04,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:54:04,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519689199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:04,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166696366] [2022-11-03 03:54:04,447 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-03 03:54:04,447 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:54:04,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:54:04,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:54:04,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:54:30,268 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 185 for LOIs [2022-11-03 03:54:35,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:54:35,150 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 03:54:35,310 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 129 for LOIs [2022-11-03 03:54:35,977 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 03:54:36,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:55:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [166696366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:55:36,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:55:36,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 9, 9] total 59 [2022-11-03 03:55:36,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753560979] [2022-11-03 03:55:36,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:55:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:55:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:55:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:55:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3107, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 03:55:36,378 INFO L87 Difference]: Start difference. First operand 1046 states and 1308 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) [2022-11-03 03:56:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:13,970 INFO L93 Difference]: Finished difference Result 1778 states and 2259 transitions. [2022-11-03 03:56:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-03 03:56:13,972 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 [2022-11-03 03:56:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:13,977 INFO L225 Difference]: With dead ends: 1778 [2022-11-03 03:56:13,978 INFO L226 Difference]: Without dead ends: 1114 [2022-11-03 03:56:13,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 217 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 86.0s TimeCoverageRelationStatistics Valid=622, Invalid=5384, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 03:56:13,982 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 331 mSDsluCounter, 4822 mSDsCounter, 0 mSdLazyCounter, 4183 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 5087 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 4183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:13,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 5087 Invalid, 4357 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [174 Valid, 4183 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-11-03 03:56:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-11-03 03:56:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1033. [2022-11-03 03:56:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 751 states have (on average 1.245006657789614) internal successors, (935), 760 states have internal predecessors, (935), 176 states have call successors, (176), 105 states have call predecessors, (176), 105 states have return successors, (176), 167 states have call predecessors, (176), 176 states have call successors, (176) [2022-11-03 03:56:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1287 transitions. [2022-11-03 03:56:14,301 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1287 transitions. Word has length 93 [2022-11-03 03:56:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:14,301 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 1287 transitions. [2022-11-03 03:56:14,302 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) [2022-11-03 03:56:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1287 transitions. [2022-11-03 03:56:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 03:56:14,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:14,304 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] [2022-11-03 03:56:14,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:14,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 03:56:14,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2099641355, now seen corresponding path program 1 times [2022-11-03 03:56:14,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:14,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537696355] [2022-11-03 03:56:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:14,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:56:14,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:14,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537696355] [2022-11-03 03:56:14,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537696355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:14,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:14,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:14,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555306470] [2022-11-03 03:56:14,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:14,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:14,736 INFO L87 Difference]: Start difference. First operand 1033 states and 1287 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) [2022-11-03 03:56:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:15,140 INFO L93 Difference]: Finished difference Result 1730 states and 2182 transitions. [2022-11-03 03:56:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:15,141 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 [2022-11-03 03:56:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:15,144 INFO L225 Difference]: With dead ends: 1730 [2022-11-03 03:56:15,144 INFO L226 Difference]: Without dead ends: 1017 [2022-11-03 03:56:15,146 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 [2022-11-03 03:56:15,148 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 7 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:15,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 568 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-11-03 03:56:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 942. [2022-11-03 03:56:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 689 states have (on average 1.2060957910014514) internal successors, (831), 698 states have internal predecessors, (831), 156 states have call successors, (156), 96 states have call predecessors, (156), 96 states have return successors, (156), 147 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-03 03:56:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1143 transitions. [2022-11-03 03:56:15,398 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1143 transitions. Word has length 103 [2022-11-03 03:56:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:15,399 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 1143 transitions. [2022-11-03 03:56:15,399 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) [2022-11-03 03:56:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1143 transitions. [2022-11-03 03:56:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 03:56:15,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:15,402 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] [2022-11-03 03:56:15,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 03:56:15,403 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1490379325, now seen corresponding path program 1 times [2022-11-03 03:56:15,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:15,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362955577] [2022-11-03 03:56:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:15,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 03:56:15,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362955577] [2022-11-03 03:56:15,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362955577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:15,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:15,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:15,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708851614] [2022-11-03 03:56:15,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:15,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:15,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:15,644 INFO L87 Difference]: Start difference. First operand 942 states and 1143 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) [2022-11-03 03:56:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:15,999 INFO L93 Difference]: Finished difference Result 1507 states and 1860 transitions. [2022-11-03 03:56:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:16,000 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 [2022-11-03 03:56:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:16,008 INFO L225 Difference]: With dead ends: 1507 [2022-11-03 03:56:16,008 INFO L226 Difference]: Without dead ends: 927 [2022-11-03 03:56:16,010 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 [2022-11-03 03:56:16,011 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 6 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:16,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 559 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-03 03:56:16,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 903. [2022-11-03 03:56:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 661 states have (on average 1.1830559757942511) internal successors, (782), 670 states have internal predecessors, (782), 148 states have call successors, (148), 93 states have call predecessors, (148), 93 states have return successors, (148), 139 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-03 03:56:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1078 transitions. [2022-11-03 03:56:16,311 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1078 transitions. Word has length 119 [2022-11-03 03:56:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:16,313 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1078 transitions. [2022-11-03 03:56:16,314 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) [2022-11-03 03:56:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1078 transitions. [2022-11-03 03:56:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:56:16,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:16,317 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] [2022-11-03 03:56:16,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 03:56:16,317 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1920675334, now seen corresponding path program 1 times [2022-11-03 03:56:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785389525] [2022-11-03 03:56:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:16,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 03:56:16,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785389525] [2022-11-03 03:56:16,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785389525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267753648] [2022-11-03 03:56:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:16,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:16,703 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:16,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_323bdfbb-16fe-4226-b8bf-40f13c29192e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:56:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:56:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:56:17,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-03 03:56:17,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267753648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:17,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857549276] [2022-11-03 03:56:17,253 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-11-03 03:56:17,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:56:17,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:56:17,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:56:17,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:56:23,457 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 74 for LOIs [2022-11-03 03:56:23,556 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 03:56:23,564 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 03:56:23,699 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 108 for LOIs [2022-11-03 03:56:23,723 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 117 for LOIs [2022-11-03 03:56:24,084 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 116 for LOIs [2022-11-03 03:56:24,466 INFO L180 IcfgInterpreter]: Interpretation finished