./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:47:48,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:47:48,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:47:48,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:47:48,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:47:48,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:47:48,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:47:48,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:47:48,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:47:48,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:47:48,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:47:48,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:47:48,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:47:48,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:47:48,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:47:48,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:47:48,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:47:48,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:47:48,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:47:48,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:47:48,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:47:48,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:47:48,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:47:48,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:47:48,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:47:48,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:47:48,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:47:48,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:47:48,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:47:48,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:47:48,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:47:48,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:47:48,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:47:48,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:47:48,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:47:48,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:47:48,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:47:48,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:47:48,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:47:48,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:47:48,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:47:48,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:47:48,429 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:47:48,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:47:48,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:47:48,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:47:48,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:47:48,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:47:48,435 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:47:48,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:47:48,435 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:47:48,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:47:48,436 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:47:48,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:47:48,436 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:47:48,436 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:47:48,436 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:47:48,437 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:47:48,437 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:47:48,437 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:47:48,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:47:48,438 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:47:48,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:47:48,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:47:48,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:47:48,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:47:48,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:47:48,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:47:48,439 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:47:48,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:47:48,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:47:48,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:47:48,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:47:48,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:47:48,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:47:48,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:47:48,440 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:47:48,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:47:48,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:47:48,440 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:47:48,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:47:48,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:47:48,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:47:48,441 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_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb [2022-12-14 12:47:48,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:47:48,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:47:48,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:47:48,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:47:48,649 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:47:48,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c [2022-12-14 12:47:51,315 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:47:51,515 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:47:51,516 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c [2022-12-14 12:47:51,528 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/data/5bc8a71a0/c37e2c440b2d47e09ca80354be91fb32/FLAG4407ad2b1 [2022-12-14 12:47:51,541 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/data/5bc8a71a0/c37e2c440b2d47e09ca80354be91fb32 [2022-12-14 12:47:51,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:47:51,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:47:51,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:47:51,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:47:51,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:47:51,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdc7676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51, skipping insertion in model container [2022-12-14 12:47:51,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:47:51,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:47:51,701 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924] [2022-12-14 12:47:51,748 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429] [2022-12-14 12:47:51,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:47:51,816 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:47:51,824 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924] [2022-12-14 12:47:51,846 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429] [2022-12-14 12:47:51,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:47:51,910 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:47:51,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51 WrapperNode [2022-12-14 12:47:51,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:47:51,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:47:51,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:47:51,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:47:51,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,956 INFO L138 Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 846 [2022-12-14 12:47:51,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:47:51,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:47:51,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:47:51,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:47:51,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,993 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:51,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:52,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:47:52,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:47:52,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:47:52,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:47:52,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (1/1) ... [2022-12-14 12:47:52,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:47:52,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:52,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:47:52,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:47:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:47:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:47:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:47:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 12:47:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 12:47:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 12:47:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 12:47:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 12:47:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 12:47:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 12:47:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 12:47:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 12:47:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 12:47:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 12:47:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 12:47:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 12:47:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 12:47:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 12:47:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 12:47:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 12:47:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 12:47:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 12:47:52,062 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 12:47:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:47:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 12:47:52,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 12:47:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 12:47:52,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 12:47:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:47:52,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:47:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 12:47:52,063 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 12:47:52,161 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:47:52,163 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:47:52,684 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-12-14 12:47:52,684 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-12-14 12:47:52,735 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:47:52,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:47:52,983 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 12:47:52,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:47:52 BoogieIcfgContainer [2022-12-14 12:47:52,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:47:52,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:47:52,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:47:52,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:47:52,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:47:51" (1/3) ... [2022-12-14 12:47:52,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1395f529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:47:52, skipping insertion in model container [2022-12-14 12:47:52,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:47:51" (2/3) ... [2022-12-14 12:47:52,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1395f529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:47:52, skipping insertion in model container [2022-12-14 12:47:52,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:47:52" (3/3) ... [2022-12-14 12:47:52,991 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-1.c [2022-12-14 12:47:53,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:47:53,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 12:47:53,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:47:53,048 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;@5d40f716, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:47:53,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 12:47:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 168 states have (on average 1.5297619047619047) internal successors, (257), 174 states have internal predecessors, (257), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 12:47:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 12:47:53,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:53,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:53,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash -398373846, now seen corresponding path program 1 times [2022-12-14 12:47:53,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:53,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400317500] [2022-12-14 12:47:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:47:53,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:53,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400317500] [2022-12-14 12:47:53,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400317500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:53,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:53,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:47:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403891807] [2022-12-14 12:47:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:53,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:47:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:47:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:47:53,352 INFO L87 Difference]: Start difference. First operand has 223 states, 168 states have (on average 1.5297619047619047) internal successors, (257), 174 states have internal predecessors, (257), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:47:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:53,693 INFO L93 Difference]: Finished difference Result 569 states and 844 transitions. [2022-12-14 12:47:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:47:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-12-14 12:47:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:53,708 INFO L225 Difference]: With dead ends: 569 [2022-12-14 12:47:53,708 INFO L226 Difference]: Without dead ends: 347 [2022-12-14 12:47:53,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:47:53,715 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 385 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:53,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 594 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:47:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-12-14 12:47:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 336. [2022-12-14 12:47:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 249 states have (on average 1.4337349397590362) internal successors, (357), 253 states have internal predecessors, (357), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (59), 56 states have call predecessors, (59), 56 states have call successors, (59) [2022-12-14 12:47:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 474 transitions. [2022-12-14 12:47:53,770 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 474 transitions. Word has length 44 [2022-12-14 12:47:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:53,770 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 474 transitions. [2022-12-14 12:47:53,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:47:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 474 transitions. [2022-12-14 12:47:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:47:53,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:53,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:53,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:47:53,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash -468778196, now seen corresponding path program 1 times [2022-12-14 12:47:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:53,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839797267] [2022-12-14 12:47:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:53,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:47:53,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:53,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839797267] [2022-12-14 12:47:53,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839797267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:53,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:53,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:47:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845367084] [2022-12-14 12:47:53,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:53,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:47:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:47:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:53,873 INFO L87 Difference]: Start difference. First operand 336 states and 474 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:47:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:54,499 INFO L93 Difference]: Finished difference Result 873 states and 1197 transitions. [2022-12-14 12:47:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:47:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 12:47:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:54,504 INFO L225 Difference]: With dead ends: 873 [2022-12-14 12:47:54,504 INFO L226 Difference]: Without dead ends: 407 [2022-12-14 12:47:54,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:47:54,509 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 846 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:54,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1041 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:47:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-14 12:47:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 322. [2022-12-14 12:47:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 235 states have (on average 1.3787234042553191) internal successors, (324), 239 states have internal predecessors, (324), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-12-14 12:47:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 438 transitions. [2022-12-14 12:47:54,548 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 438 transitions. Word has length 45 [2022-12-14 12:47:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:54,548 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 438 transitions. [2022-12-14 12:47:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:47:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 438 transitions. [2022-12-14 12:47:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:47:54,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:54,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:54,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:47:54,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1117894855, now seen corresponding path program 1 times [2022-12-14 12:47:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:54,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742072327] [2022-12-14 12:47:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:47:54,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:54,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742072327] [2022-12-14 12:47:54,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742072327] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:54,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:54,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:47:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874629874] [2022-12-14 12:47:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:54,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:47:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:47:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:54,667 INFO L87 Difference]: Start difference. First operand 322 states and 438 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:47:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:55,172 INFO L93 Difference]: Finished difference Result 788 states and 1046 transitions. [2022-12-14 12:47:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:47:55,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-12-14 12:47:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:55,177 INFO L225 Difference]: With dead ends: 788 [2022-12-14 12:47:55,177 INFO L226 Difference]: Without dead ends: 611 [2022-12-14 12:47:55,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:47:55,179 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 760 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:55,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 983 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:47:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-12-14 12:47:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 586. [2022-12-14 12:47:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 416 states have (on average 1.3052884615384615) internal successors, (543), 420 states have internal predecessors, (543), 107 states have call successors, (107), 62 states have call predecessors, (107), 61 states have return successors, (122), 105 states have call predecessors, (122), 105 states have call successors, (122) [2022-12-14 12:47:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 772 transitions. [2022-12-14 12:47:55,214 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 772 transitions. Word has length 46 [2022-12-14 12:47:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:55,215 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 772 transitions. [2022-12-14 12:47:55,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:47:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 772 transitions. [2022-12-14 12:47:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 12:47:55,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:55,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:55,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:47:55,216 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:55,217 INFO L85 PathProgramCache]: Analyzing trace with hash -191973163, now seen corresponding path program 1 times [2022-12-14 12:47:55,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:55,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645457779] [2022-12-14 12:47:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:47:55,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645457779] [2022-12-14 12:47:55,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645457779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:55,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:55,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:47:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874544169] [2022-12-14 12:47:55,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:55,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:55,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:55,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:55,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:47:55,256 INFO L87 Difference]: Start difference. First operand 586 states and 772 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:55,344 INFO L93 Difference]: Finished difference Result 587 states and 773 transitions. [2022-12-14 12:47:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2022-12-14 12:47:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:55,346 INFO L225 Difference]: With dead ends: 587 [2022-12-14 12:47:55,346 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 12:47:55,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:47:55,348 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 282 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:55,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 248 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 12:47:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-12-14 12:47:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 114 states have (on average 1.5) internal successors, (171), 115 states have internal predecessors, (171), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:47:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 215 transitions. [2022-12-14 12:47:55,360 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 215 transitions. Word has length 50 [2022-12-14 12:47:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:55,360 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 215 transitions. [2022-12-14 12:47:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 215 transitions. [2022-12-14 12:47:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 12:47:55,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:55,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:55,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:47:55,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1275960142, now seen corresponding path program 1 times [2022-12-14 12:47:55,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:55,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924871658] [2022-12-14 12:47:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:55,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:47:55,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:55,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924871658] [2022-12-14 12:47:55,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924871658] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:55,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:55,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:47:55,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74542181] [2022-12-14 12:47:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:47:55,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:47:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:47:55,493 INFO L87 Difference]: Start difference. First operand 143 states and 215 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:47:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:56,013 INFO L93 Difference]: Finished difference Result 801 states and 1286 transitions. [2022-12-14 12:47:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:47:56,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-12-14 12:47:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:56,018 INFO L225 Difference]: With dead ends: 801 [2022-12-14 12:47:56,018 INFO L226 Difference]: Without dead ends: 664 [2022-12-14 12:47:56,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:47:56,019 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 953 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:56,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 961 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:47:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-12-14 12:47:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 653. [2022-12-14 12:47:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 531 states have (on average 1.5009416195856873) internal successors, (797), 535 states have internal predecessors, (797), 91 states have call successors, (91), 30 states have call predecessors, (91), 30 states have return successors, (137), 88 states have call predecessors, (137), 91 states have call successors, (137) [2022-12-14 12:47:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1025 transitions. [2022-12-14 12:47:56,060 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1025 transitions. Word has length 55 [2022-12-14 12:47:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:56,060 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 1025 transitions. [2022-12-14 12:47:56,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:47:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1025 transitions. [2022-12-14 12:47:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 12:47:56,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:56,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:56,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:47:56,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash -621028999, now seen corresponding path program 1 times [2022-12-14 12:47:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:56,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119164354] [2022-12-14 12:47:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:56,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:47:56,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119164354] [2022-12-14 12:47:56,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119164354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:56,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455322995] [2022-12-14 12:47:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:56,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:56,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:47:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:47:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:47:56,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:56,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455322995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:56,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:56,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:47:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372771916] [2022-12-14 12:47:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:56,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:56,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:56,388 INFO L87 Difference]: Start difference. First operand 653 states and 1025 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:56,562 INFO L93 Difference]: Finished difference Result 1931 states and 3121 transitions. [2022-12-14 12:47:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 12:47:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:56,567 INFO L225 Difference]: With dead ends: 1931 [2022-12-14 12:47:56,567 INFO L226 Difference]: Without dead ends: 1284 [2022-12-14 12:47:56,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:56,571 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 184 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:56,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 361 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-12-14 12:47:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1277. [2022-12-14 12:47:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1043 states have (on average 1.49568552253116) internal successors, (1560), 1050 states have internal predecessors, (1560), 173 states have call successors, (173), 60 states have call predecessors, (173), 60 states have return successors, (261), 167 states have call predecessors, (261), 173 states have call successors, (261) [2022-12-14 12:47:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1994 transitions. [2022-12-14 12:47:56,644 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1994 transitions. Word has length 108 [2022-12-14 12:47:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:56,644 INFO L495 AbstractCegarLoop]: Abstraction has 1277 states and 1994 transitions. [2022-12-14 12:47:56,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1994 transitions. [2022-12-14 12:47:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 12:47:56,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:56,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:56,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:47:56,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:56,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1438224423, now seen corresponding path program 1 times [2022-12-14 12:47:56,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:56,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136187755] [2022-12-14 12:47:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:56,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:47:56,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:56,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136187755] [2022-12-14 12:47:56,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136187755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025916221] [2022-12-14 12:47:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:56,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:56,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:56,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:47:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:47:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:47:57,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:57,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025916221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:57,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:57,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:47:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391265796] [2022-12-14 12:47:57,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:57,186 INFO L87 Difference]: Start difference. First operand 1277 states and 1994 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:57,405 INFO L93 Difference]: Finished difference Result 3788 states and 6084 transitions. [2022-12-14 12:47:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 12:47:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:57,416 INFO L225 Difference]: With dead ends: 3788 [2022-12-14 12:47:57,416 INFO L226 Difference]: Without dead ends: 2517 [2022-12-14 12:47:57,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:57,421 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 178 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:57,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 361 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2022-12-14 12:47:57,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2505. [2022-12-14 12:47:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2052 states have (on average 1.489278752436647) internal successors, (3056), 2065 states have internal predecessors, (3056), 332 states have call successors, (332), 120 states have call predecessors, (332), 120 states have return successors, (500), 320 states have call predecessors, (500), 332 states have call successors, (500) [2022-12-14 12:47:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3888 transitions. [2022-12-14 12:47:57,625 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3888 transitions. Word has length 108 [2022-12-14 12:47:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:57,625 INFO L495 AbstractCegarLoop]: Abstraction has 2505 states and 3888 transitions. [2022-12-14 12:47:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3888 transitions. [2022-12-14 12:47:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 12:47:57,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:57,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:57,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:47:57,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:57,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash 291065401, now seen corresponding path program 1 times [2022-12-14 12:47:57,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:57,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040479536] [2022-12-14 12:47:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:47:57,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:57,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040479536] [2022-12-14 12:47:57,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040479536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:57,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423211247] [2022-12-14 12:47:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:57,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:57,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:57,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:47:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:47:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:47:58,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423211247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:58,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:58,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:47:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067610354] [2022-12-14 12:47:58,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:58,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:58,084 INFO L87 Difference]: Start difference. First operand 2505 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:58,408 INFO L93 Difference]: Finished difference Result 7442 states and 11869 transitions. [2022-12-14 12:47:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 12:47:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:58,428 INFO L225 Difference]: With dead ends: 7442 [2022-12-14 12:47:58,428 INFO L226 Difference]: Without dead ends: 4943 [2022-12-14 12:47:58,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:58,439 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 187 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:58,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 361 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-12-14 12:47:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 4921. [2022-12-14 12:47:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4921 states, 4040 states have (on average 1.4821782178217822) internal successors, (5988), 4065 states have internal predecessors, (5988), 640 states have call successors, (640), 240 states have call predecessors, (640), 240 states have return successors, (960), 616 states have call predecessors, (960), 640 states have call successors, (960) [2022-12-14 12:47:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4921 states to 4921 states and 7588 transitions. [2022-12-14 12:47:58,683 INFO L78 Accepts]: Start accepts. Automaton has 4921 states and 7588 transitions. Word has length 108 [2022-12-14 12:47:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:58,684 INFO L495 AbstractCegarLoop]: Abstraction has 4921 states and 7588 transitions. [2022-12-14 12:47:58,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4921 states and 7588 transitions. [2022-12-14 12:47:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 12:47:58,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:58,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:58,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:47:58,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:58,890 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash -903177255, now seen corresponding path program 1 times [2022-12-14 12:47:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:58,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325503754] [2022-12-14 12:47:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:47:58,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325503754] [2022-12-14 12:47:58,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325503754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558808147] [2022-12-14 12:47:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:58,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:58,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:58,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:58,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:47:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:59,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:47:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:47:59,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:59,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558808147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:59,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:59,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:47:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386081209] [2022-12-14 12:47:59,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:59,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:59,162 INFO L87 Difference]: Start difference. First operand 4921 states and 7588 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:47:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:59,777 INFO L93 Difference]: Finished difference Result 14630 states and 23157 transitions. [2022-12-14 12:47:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 12:47:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:59,813 INFO L225 Difference]: With dead ends: 14630 [2022-12-14 12:47:59,814 INFO L226 Difference]: Without dead ends: 9715 [2022-12-14 12:47:59,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:59,828 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 172 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:59,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 358 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9715 states. [2022-12-14 12:48:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9715 to 9673. [2022-12-14 12:48:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9673 states, 7956 states have (on average 1.4746103569632982) internal successors, (11732), 8005 states have internal predecessors, (11732), 1236 states have call successors, (1236), 480 states have call predecessors, (1236), 480 states have return successors, (1844), 1188 states have call predecessors, (1844), 1236 states have call successors, (1844) [2022-12-14 12:48:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9673 states to 9673 states and 14812 transitions. [2022-12-14 12:48:00,304 INFO L78 Accepts]: Start accepts. Automaton has 9673 states and 14812 transitions. Word has length 108 [2022-12-14 12:48:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:00,304 INFO L495 AbstractCegarLoop]: Abstraction has 9673 states and 14812 transitions. [2022-12-14 12:48:00,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9673 states and 14812 transitions. [2022-12-14 12:48:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 12:48:00,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:00,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:00,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:48:00,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 12:48:00,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:00,515 INFO L85 PathProgramCache]: Analyzing trace with hash 920371769, now seen corresponding path program 1 times [2022-12-14 12:48:00,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:00,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974314551] [2022-12-14 12:48:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:00,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 12:48:00,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:00,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974314551] [2022-12-14 12:48:00,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974314551] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:00,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:00,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:00,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551145494] [2022-12-14 12:48:00,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:00,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:00,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:00,579 INFO L87 Difference]: Start difference. First operand 9673 states and 14812 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:48:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:01,259 INFO L93 Difference]: Finished difference Result 19627 states and 30781 transitions. [2022-12-14 12:48:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-12-14 12:48:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:01,311 INFO L225 Difference]: With dead ends: 19627 [2022-12-14 12:48:01,311 INFO L226 Difference]: Without dead ends: 11881 [2022-12-14 12:48:01,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:01,330 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 92 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:01,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 455 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:48:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2022-12-14 12:48:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 11097. [2022-12-14 12:48:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 9316 states have (on average 1.5118076427651352) internal successors, (14084), 9365 states have internal predecessors, (14084), 1268 states have call successors, (1268), 512 states have call predecessors, (1268), 512 states have return successors, (1876), 1220 states have call predecessors, (1876), 1268 states have call successors, (1876) [2022-12-14 12:48:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 17228 transitions. [2022-12-14 12:48:01,982 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 17228 transitions. Word has length 108 [2022-12-14 12:48:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:01,982 INFO L495 AbstractCegarLoop]: Abstraction has 11097 states and 17228 transitions. [2022-12-14 12:48:01,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:48:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 17228 transitions. [2022-12-14 12:48:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 12:48:02,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:02,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:02,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:48:02,009 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash -203382492, now seen corresponding path program 1 times [2022-12-14 12:48:02,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:02,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461109265] [2022-12-14 12:48:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:02,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 12:48:02,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:02,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461109265] [2022-12-14 12:48:02,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461109265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:02,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:02,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:02,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572698829] [2022-12-14 12:48:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:02,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:02,089 INFO L87 Difference]: Start difference. First operand 11097 states and 17228 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:03,094 INFO L93 Difference]: Finished difference Result 32926 states and 52193 transitions. [2022-12-14 12:48:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:03,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 12:48:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:03,151 INFO L225 Difference]: With dead ends: 32926 [2022-12-14 12:48:03,151 INFO L226 Difference]: Without dead ends: 21835 [2022-12-14 12:48:03,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:03,177 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 178 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:03,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 360 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:48:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21835 states. [2022-12-14 12:48:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21835 to 21721. [2022-12-14 12:48:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21721 states, 18244 states have (on average 1.5016443762332823) internal successors, (27396), 18341 states have internal predecessors, (27396), 2452 states have call successors, (2452), 1024 states have call predecessors, (2452), 1024 states have return successors, (3604), 2356 states have call predecessors, (3604), 2452 states have call successors, (3604) [2022-12-14 12:48:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21721 states to 21721 states and 33452 transitions. [2022-12-14 12:48:04,448 INFO L78 Accepts]: Start accepts. Automaton has 21721 states and 33452 transitions. Word has length 146 [2022-12-14 12:48:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:04,448 INFO L495 AbstractCegarLoop]: Abstraction has 21721 states and 33452 transitions. [2022-12-14 12:48:04,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21721 states and 33452 transitions. [2022-12-14 12:48:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 12:48:04,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:04,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:48:04,508 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:04,509 INFO L85 PathProgramCache]: Analyzing trace with hash 429667465, now seen corresponding path program 1 times [2022-12-14 12:48:04,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695621036] [2022-12-14 12:48:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 12:48:04,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695621036] [2022-12-14 12:48:04,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695621036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:04,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:04,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487527698] [2022-12-14 12:48:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:04,617 INFO L87 Difference]: Start difference. First operand 21721 states and 33452 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:06,457 INFO L93 Difference]: Finished difference Result 64446 states and 101249 transitions. [2022-12-14 12:48:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:06,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 12:48:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:06,576 INFO L225 Difference]: With dead ends: 64446 [2022-12-14 12:48:06,576 INFO L226 Difference]: Without dead ends: 42731 [2022-12-14 12:48:06,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:06,620 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 180 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:06,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 360 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:48:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42731 states. [2022-12-14 12:48:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42731 to 42505. [2022-12-14 12:48:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42505 states, 35716 states have (on average 1.4909844327472281) internal successors, (53252), 35909 states have internal predecessors, (53252), 4740 states have call successors, (4740), 2048 states have call predecessors, (4740), 2048 states have return successors, (6916), 4548 states have call predecessors, (6916), 4740 states have call successors, (6916) [2022-12-14 12:48:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42505 states to 42505 states and 64908 transitions. [2022-12-14 12:48:09,041 INFO L78 Accepts]: Start accepts. Automaton has 42505 states and 64908 transitions. Word has length 146 [2022-12-14 12:48:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:09,041 INFO L495 AbstractCegarLoop]: Abstraction has 42505 states and 64908 transitions. [2022-12-14 12:48:09,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 42505 states and 64908 transitions. [2022-12-14 12:48:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 12:48:09,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:09,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:09,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:48:09,093 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2074936289, now seen corresponding path program 1 times [2022-12-14 12:48:09,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:09,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257327741] [2022-12-14 12:48:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 12:48:09,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:09,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257327741] [2022-12-14 12:48:09,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257327741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:09,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:09,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482438908] [2022-12-14 12:48:09,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:09,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:09,148 INFO L87 Difference]: Start difference. First operand 42505 states and 64908 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:12,507 INFO L93 Difference]: Finished difference Result 126094 states and 196241 transitions. [2022-12-14 12:48:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:12,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 12:48:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:12,868 INFO L225 Difference]: With dead ends: 126094 [2022-12-14 12:48:12,868 INFO L226 Difference]: Without dead ends: 83595 [2022-12-14 12:48:12,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:12,990 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 183 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:12,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 368 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:48:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83595 states. [2022-12-14 12:48:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83595 to 83145. [2022-12-14 12:48:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83145 states, 69892 states have (on average 1.4798260172838094) internal successors, (103428), 70277 states have internal predecessors, (103428), 9156 states have call successors, (9156), 4096 states have call predecessors, (9156), 4096 states have return successors, (13252), 8772 states have call predecessors, (13252), 9156 states have call successors, (13252) [2022-12-14 12:48:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83145 states to 83145 states and 125836 transitions. [2022-12-14 12:48:17,440 INFO L78 Accepts]: Start accepts. Automaton has 83145 states and 125836 transitions. Word has length 146 [2022-12-14 12:48:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:17,440 INFO L495 AbstractCegarLoop]: Abstraction has 83145 states and 125836 transitions. [2022-12-14 12:48:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 83145 states and 125836 transitions. [2022-12-14 12:48:17,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 12:48:17,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:17,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:17,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 12:48:17,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash -622297175, now seen corresponding path program 1 times [2022-12-14 12:48:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:17,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747678084] [2022-12-14 12:48:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:17,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 12:48:17,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747678084] [2022-12-14 12:48:17,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747678084] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:17,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:17,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:17,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142602406] [2022-12-14 12:48:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:17,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:17,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:17,652 INFO L87 Difference]: Start difference. First operand 83145 states and 125836 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:48:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:23,923 INFO L93 Difference]: Finished difference Result 217677 states and 336654 transitions. [2022-12-14 12:48:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 12:48:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:24,326 INFO L225 Difference]: With dead ends: 217677 [2022-12-14 12:48:24,326 INFO L226 Difference]: Without dead ends: 134539 [2022-12-14 12:48:24,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:24,493 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 102 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:24,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 400 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:48:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134539 states. [2022-12-14 12:48:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134539 to 117841. [2022-12-14 12:48:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117841 states, 102792 states have (on average 1.5479025605105456) internal successors, (159112), 103178 states have internal predecessors, (159112), 10054 states have call successors, (10054), 4994 states have call predecessors, (10054), 4994 states have return successors, (14150), 9669 states have call predecessors, (14150), 10054 states have call successors, (14150) [2022-12-14 12:48:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117841 states to 117841 states and 183316 transitions. [2022-12-14 12:48:30,618 INFO L78 Accepts]: Start accepts. Automaton has 117841 states and 183316 transitions. Word has length 167 [2022-12-14 12:48:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:30,618 INFO L495 AbstractCegarLoop]: Abstraction has 117841 states and 183316 transitions. [2022-12-14 12:48:30,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:48:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 117841 states and 183316 transitions. [2022-12-14 12:48:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 12:48:30,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:30,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:30,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 12:48:30,791 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:30,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1547108847, now seen corresponding path program 2 times [2022-12-14 12:48:30,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:30,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025850954] [2022-12-14 12:48:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:30,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 12:48:31,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025850954] [2022-12-14 12:48:31,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025850954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723273273] [2022-12-14 12:48:31,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:48:31,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:31,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:31,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:31,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:48:31,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:48:31,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:48:31,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:31,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:48:31,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:31,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723273273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:31,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:31,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:48:31,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788078506] [2022-12-14 12:48:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:31,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:31,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:48:31,316 INFO L87 Difference]: Start difference. First operand 117841 states and 183316 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:48:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:37,558 INFO L93 Difference]: Finished difference Result 209996 states and 324425 transitions. [2022-12-14 12:48:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:37,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 12:48:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:37,925 INFO L225 Difference]: With dead ends: 209996 [2022-12-14 12:48:37,925 INFO L226 Difference]: Without dead ends: 141066 [2022-12-14 12:48:38,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:48:38,074 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 174 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:38,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 253 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:48:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141066 states. [2022-12-14 12:48:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141066 to 141066. [2022-12-14 12:48:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141066 states, 124102 states have (on average 1.49817085945432) internal successors, (185926), 124488 states have internal predecessors, (185926), 10691 states have call successors, (10691), 6271 states have call predecessors, (10691), 6272 states have return successors, (15297), 10307 states have call predecessors, (15297), 10691 states have call successors, (15297) [2022-12-14 12:48:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141066 states to 141066 states and 211914 transitions. [2022-12-14 12:48:44,354 INFO L78 Accepts]: Start accepts. Automaton has 141066 states and 211914 transitions. Word has length 167 [2022-12-14 12:48:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:44,355 INFO L495 AbstractCegarLoop]: Abstraction has 141066 states and 211914 transitions. [2022-12-14 12:48:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:48:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 141066 states and 211914 transitions. [2022-12-14 12:48:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 12:48:44,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:44,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:44,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:48:44,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:48:44,753 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2032283566, now seen corresponding path program 1 times [2022-12-14 12:48:44,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:44,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382006347] [2022-12-14 12:48:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 17 proven. 57 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 12:48:45,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:45,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382006347] [2022-12-14 12:48:45,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382006347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:45,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526134626] [2022-12-14 12:48:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:45,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:45,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:45,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:45,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:48:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:45,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 12:48:45,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:45,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526134626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:45,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:45,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:48:45,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532521943] [2022-12-14 12:48:45,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:45,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:45,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:45,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:45,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:48:45,269 INFO L87 Difference]: Start difference. First operand 141066 states and 211914 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:48:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:53,184 INFO L93 Difference]: Finished difference Result 272651 states and 413572 transitions. [2022-12-14 12:48:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 12:48:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:53,760 INFO L225 Difference]: With dead ends: 272651 [2022-12-14 12:48:53,760 INFO L226 Difference]: Without dead ends: 201033 [2022-12-14 12:48:53,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:48:53,915 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 141 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:53,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 497 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:48:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201033 states. [2022-12-14 12:49:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201033 to 174026. [2022-12-14 12:49:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174026 states, 155270 states have (on average 1.535016423005088) internal successors, (238342), 155656 states have internal predecessors, (238342), 11587 states have call successors, (11587), 7167 states have call predecessors, (11587), 7168 states have return successors, (16193), 11203 states have call predecessors, (16193), 11587 states have call successors, (16193) [2022-12-14 12:49:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174026 states to 174026 states and 266122 transitions. [2022-12-14 12:49:02,160 INFO L78 Accepts]: Start accepts. Automaton has 174026 states and 266122 transitions. Word has length 167 [2022-12-14 12:49:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:02,161 INFO L495 AbstractCegarLoop]: Abstraction has 174026 states and 266122 transitions. [2022-12-14 12:49:02,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:49:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 174026 states and 266122 transitions. [2022-12-14 12:49:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 12:49:02,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:02,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:49:02,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 12:49:02,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:49:02,593 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1218021609, now seen corresponding path program 2 times [2022-12-14 12:49:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:02,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468289648] [2022-12-14 12:49:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 12:49:02,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468289648] [2022-12-14 12:49:02,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468289648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656944961] [2022-12-14 12:49:02,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:49:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:02,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:02,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:49:02,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:49:02,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:49:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:49:03,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656944961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:03,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:03,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:49:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204182515] [2022-12-14 12:49:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:03,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:03,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:03,002 INFO L87 Difference]: Start difference. First operand 174026 states and 266122 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:13,221 INFO L93 Difference]: Finished difference Result 349701 states and 541885 transitions. [2022-12-14 12:49:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 12:49:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:14,016 INFO L225 Difference]: With dead ends: 349701 [2022-12-14 12:49:14,016 INFO L226 Difference]: Without dead ends: 247876 [2022-12-14 12:49:14,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:14,205 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 194 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:14,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 519 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247876 states. [2022-12-14 12:49:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247876 to 245570. [2022-12-14 12:49:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245570 states, 219267 states have (on average 1.5332676599761934) internal successors, (336195), 219781 states have internal predecessors, (336195), 16193 states have call successors, (16193), 10109 states have call predecessors, (16193), 10109 states have return successors, (25018), 15680 states have call predecessors, (25018), 16193 states have call successors, (25018) [2022-12-14 12:49:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245570 states to 245570 states and 377406 transitions. [2022-12-14 12:49:26,415 INFO L78 Accepts]: Start accepts. Automaton has 245570 states and 377406 transitions. Word has length 167 [2022-12-14 12:49:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:26,415 INFO L495 AbstractCegarLoop]: Abstraction has 245570 states and 377406 transitions. [2022-12-14 12:49:26,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 245570 states and 377406 transitions. [2022-12-14 12:49:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 12:49:26,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:26,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:49:26,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:49:26,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:49:26,849 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1415156224, now seen corresponding path program 1 times [2022-12-14 12:49:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:26,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213663807] [2022-12-14 12:49:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 12:49:27,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:27,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213663807] [2022-12-14 12:49:27,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213663807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:27,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016525999] [2022-12-14 12:49:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:27,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:27,094 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:27,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:49:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:27,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:49:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:49:27,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:27,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016525999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:27,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:27,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:49:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784705870] [2022-12-14 12:49:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:27,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:27,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:27,305 INFO L87 Difference]: Start difference. First operand 245570 states and 377406 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:49:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:37,605 INFO L93 Difference]: Finished difference Result 371622 states and 581504 transitions. [2022-12-14 12:49:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:37,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 12:49:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:38,473 INFO L225 Difference]: With dead ends: 371622 [2022-12-14 12:49:38,473 INFO L226 Difference]: Without dead ends: 246020 [2022-12-14 12:49:38,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:38,712 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 172 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:38,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 498 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246020 states. [2022-12-14 12:49:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246020 to 242626. [2022-12-14 12:49:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242626 states, 216323 states have (on average 1.5186318606898017) internal successors, (328515), 216837 states have internal predecessors, (328515), 16193 states have call successors, (16193), 10109 states have call predecessors, (16193), 10109 states have return successors, (25018), 15680 states have call predecessors, (25018), 16193 states have call successors, (25018) [2022-12-14 12:49:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242626 states to 242626 states and 369726 transitions. [2022-12-14 12:49:50,080 INFO L78 Accepts]: Start accepts. Automaton has 242626 states and 369726 transitions. Word has length 167 [2022-12-14 12:49:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:50,081 INFO L495 AbstractCegarLoop]: Abstraction has 242626 states and 369726 transitions. [2022-12-14 12:49:50,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:49:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 242626 states and 369726 transitions. [2022-12-14 12:49:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 12:49:50,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:50,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:49:50,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:49:50,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:50,510 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1483570814, now seen corresponding path program 1 times [2022-12-14 12:49:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:50,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602225326] [2022-12-14 12:49:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 12:49:50,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602225326] [2022-12-14 12:49:50,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602225326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003594907] [2022-12-14 12:49:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:50,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:50,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:50,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:49:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:49:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:49:50,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:50,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003594907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:50,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:50,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 12:49:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731814836] [2022-12-14 12:49:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:50,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:49:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:49:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:49:50,918 INFO L87 Difference]: Start difference. First operand 242626 states and 369726 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:50:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:14,524 INFO L93 Difference]: Finished difference Result 740787 states and 1134407 transitions. [2022-12-14 12:50:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:50:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 167 [2022-12-14 12:50:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:16,171 INFO L225 Difference]: With dead ends: 740787 [2022-12-14 12:50:16,171 INFO L226 Difference]: Without dead ends: 498168 [2022-12-14 12:50:16,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:50:16,600 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 217 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:16,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 874 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:50:16,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498168 states. [2022-12-14 12:50:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498168 to 496360. [2022-12-14 12:50:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496360 states, 443323 states have (on average 1.500944006965576) internal successors, (665403), 445246 states have internal predecessors, (665403), 31928 states have call successors, (31928), 20212 states have call predecessors, (31928), 21108 states have return successors, (61712), 30902 states have call predecessors, (61712), 31928 states have call successors, (61712) [2022-12-14 12:50:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496360 states to 496360 states and 759043 transitions. [2022-12-14 12:50:42,072 INFO L78 Accepts]: Start accepts. Automaton has 496360 states and 759043 transitions. Word has length 167 [2022-12-14 12:50:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:42,072 INFO L495 AbstractCegarLoop]: Abstraction has 496360 states and 759043 transitions. [2022-12-14 12:50:42,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:50:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 496360 states and 759043 transitions. [2022-12-14 12:50:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 12:50:42,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:42,651 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:50:42,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:50:42,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:42,853 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:42,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1859445411, now seen corresponding path program 2 times [2022-12-14 12:50:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:42,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936331986] [2022-12-14 12:50:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:42,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:50:43,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:43,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936331986] [2022-12-14 12:50:43,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936331986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:43,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234744792] [2022-12-14 12:50:43,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:50:43,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:43,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:43,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5189adba-63a1-49c6-b403-940a8ae2cdeb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:50:43,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:50:43,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:50:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:50:43,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 82 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 12:50:43,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:50:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 23 proven. 56 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:50:43,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234744792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:50:43,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754538491] [2022-12-14 12:50:43,903 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-12-14 12:50:43,903 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:50:43,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:50:43,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:50:43,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:51:17,689 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 206 for LOIs [2022-12-14 12:51:17,756 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2022-12-14 12:51:23,004 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjuctions. This might take some time...