./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW --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 ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 --- 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-4e7fbc6 [2022-11-23 16:02:21,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:02:21,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:02:21,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:02:21,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:02:21,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:02:21,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:02:21,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:02:21,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:02:21,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:02:21,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:02:21,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:02:21,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:02:21,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:02:21,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:02:21,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:02:21,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:02:21,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:02:21,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:02:21,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:02:21,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:02:21,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:02:21,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:02:21,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:02:21,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:02:21,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:02:21,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:02:21,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:02:21,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:02:21,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:02:21,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:02:21,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:02:21,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:02:21,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:02:21,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:02:21,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:02:21,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:02:21,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:02:21,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:02:21,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:02:21,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:02:21,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:02:21,713 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:02:21,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:02:21,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:02:21,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:02:21,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:02:21,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:02:21,715 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:02:21,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:02:21,716 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:02:21,716 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:02:21,716 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:02:21,716 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:02:21,717 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:02:21,717 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:02:21,717 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:02:21,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:02:21,718 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:02:21,718 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:02:21,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:02:21,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:02:21,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:02:21,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:02:21,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:02:21,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:02:21,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:02:21,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:02:21,729 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:02:21,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:02:21,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:02:21,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:02:21,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:02:21,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:02:21,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:02:21,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:02:21,732 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:02:21,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:02:21,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:02:21,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:02:21,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:02:21,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:02:21,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:02:21,735 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_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 [2022-11-23 16:02:22,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:02:22,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:02:22,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:02:22,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:02:22,042 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:02:22,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2022-11-23 16:02:25,056 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:02:25,371 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:02:25,372 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2022-11-23 16:02:25,387 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/data/8c425640f/71b5de95fde546c8a72823f24c1f0e10/FLAG9ccbf9153 [2022-11-23 16:02:25,405 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/data/8c425640f/71b5de95fde546c8a72823f24c1f0e10 [2022-11-23 16:02:25,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:02:25,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:02:25,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:02:25,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:02:25,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:02:25,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:25,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab90db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25, skipping insertion in model container [2022-11-23 16:02:25,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:25,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:02:25,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:02:25,701 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_ec5047ac-b43b-403d-87a9-1b3c1b303560/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2022-11-23 16:02:25,747 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_ec5047ac-b43b-403d-87a9-1b3c1b303560/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2022-11-23 16:02:25,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:02:25,885 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:02:25,897 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_ec5047ac-b43b-403d-87a9-1b3c1b303560/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2022-11-23 16:02:25,912 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_ec5047ac-b43b-403d-87a9-1b3c1b303560/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2022-11-23 16:02:25,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:02:25,998 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:02:25,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25 WrapperNode [2022-11-23 16:02:25,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:02:26,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:02:26,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:02:26,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:02:26,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,085 INFO L138 Inliner]: procedures = 70, calls = 82, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1002 [2022-11-23 16:02:26,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:02:26,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:02:26,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:02:26,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:02:26,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,153 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:02:26,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:02:26,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:02:26,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:02:26,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (1/1) ... [2022-11-23 16:02:26,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:02:26,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:02:26,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:02:26,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:02:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:02:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 16:02:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 16:02:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-23 16:02:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-23 16:02:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 16:02:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 16:02:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 16:02:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 16:02:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 16:02:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 16:02:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 16:02:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 16:02:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 16:02:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 16:02:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:02:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 16:02:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 16:02:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:02:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:02:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 16:02:26,287 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 16:02:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 16:02:26,288 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 16:02:26,432 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:02:26,434 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:02:27,593 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:02:28,181 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:02:28,183 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-11-23 16:02:28,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:02:28 BoogieIcfgContainer [2022-11-23 16:02:28,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:02:28,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:02:28,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:02:28,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:02:28,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:02:25" (1/3) ... [2022-11-23 16:02:28,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405eaca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:02:28, skipping insertion in model container [2022-11-23 16:02:28,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:25" (2/3) ... [2022-11-23 16:02:28,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405eaca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:02:28, skipping insertion in model container [2022-11-23 16:02:28,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:02:28" (3/3) ... [2022-11-23 16:02:28,199 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2022-11-23 16:02:28,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:02:28,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 16:02:28,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:02:28,304 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;@696796bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:02:28,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 16:02:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 234 states, 188 states have (on average 1.5691489361702127) internal successors, (295), 195 states have internal predecessors, (295), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-23 16:02:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 16:02:28,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:28,322 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] [2022-11-23 16:02:28,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1249459229, now seen corresponding path program 1 times [2022-11-23 16:02:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:28,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221778708] [2022-11-23 16:02:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:28,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:02:28,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221778708] [2022-11-23 16:02:28,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221778708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:28,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:28,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007738533] [2022-11-23 16:02:28,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:28,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:28,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:28,735 INFO L87 Difference]: Start difference. First operand has 234 states, 188 states have (on average 1.5691489361702127) internal successors, (295), 195 states have internal predecessors, (295), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:02:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:29,009 INFO L93 Difference]: Finished difference Result 500 states and 770 transitions. [2022-11-23 16:02:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-23 16:02:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:29,033 INFO L225 Difference]: With dead ends: 500 [2022-11-23 16:02:29,034 INFO L226 Difference]: Without dead ends: 266 [2022-11-23 16:02:29,044 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 [2022-11-23 16:02:29,049 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 326 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:29,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 360 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:02:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-23 16:02:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2022-11-23 16:02:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 214 states have (on average 1.5046728971962617) internal successors, (322), 218 states have internal predecessors, (322), 36 states have call successors, (36), 12 states have call predecessors, (36), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-23 16:02:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 390 transitions. [2022-11-23 16:02:29,157 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 390 transitions. Word has length 28 [2022-11-23 16:02:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:29,157 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 390 transitions. [2022-11-23 16:02:29,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:02:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 390 transitions. [2022-11-23 16:02:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 16:02:29,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:29,160 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] [2022-11-23 16:02:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:02:29,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1537191659, now seen corresponding path program 1 times [2022-11-23 16:02:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:29,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167314438] [2022-11-23 16:02:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:29,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:02:29,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:29,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167314438] [2022-11-23 16:02:29,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167314438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:29,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:29,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:29,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184541078] [2022-11-23 16:02:29,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:29,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:29,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:29,304 INFO L87 Difference]: Start difference. First operand 262 states and 390 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:02:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:29,478 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2022-11-23 16:02:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-23 16:02:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:29,481 INFO L225 Difference]: With dead ends: 418 [2022-11-23 16:02:29,482 INFO L226 Difference]: Without dead ends: 337 [2022-11-23 16:02:29,482 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 [2022-11-23 16:02:29,484 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 324 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:29,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 345 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:02:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-23 16:02:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 333. [2022-11-23 16:02:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 274 states have (on average 1.4708029197080292) internal successors, (403), 278 states have internal predecessors, (403), 43 states have call successors, (43), 16 states have call predecessors, (43), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-23 16:02:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 485 transitions. [2022-11-23 16:02:29,510 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 485 transitions. Word has length 29 [2022-11-23 16:02:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:29,510 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 485 transitions. [2022-11-23 16:02:29,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:02:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 485 transitions. [2022-11-23 16:02:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 16:02:29,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:29,513 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] [2022-11-23 16:02:29,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:02:29,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1311017195, now seen corresponding path program 1 times [2022-11-23 16:02:29,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:29,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338126240] [2022-11-23 16:02:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:29,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:02:29,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338126240] [2022-11-23 16:02:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338126240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:29,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:29,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813560254] [2022-11-23 16:02:29,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:29,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:29,574 INFO L87 Difference]: Start difference. First operand 333 states and 485 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:02:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:29,792 INFO L93 Difference]: Finished difference Result 573 states and 813 transitions. [2022-11-23 16:02:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:29,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-23 16:02:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:29,796 INFO L225 Difference]: With dead ends: 573 [2022-11-23 16:02:29,797 INFO L226 Difference]: Without dead ends: 421 [2022-11-23 16:02:29,801 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 [2022-11-23 16:02:29,805 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 46 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:29,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 575 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:02:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-23 16:02:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 407. [2022-11-23 16:02:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 337 states have (on average 1.4480712166172107) internal successors, (488), 343 states have internal predecessors, (488), 49 states have call successors, (49), 21 states have call predecessors, (49), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-23 16:02:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 582 transitions. [2022-11-23 16:02:29,846 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 582 transitions. Word has length 30 [2022-11-23 16:02:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:29,847 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 582 transitions. [2022-11-23 16:02:29,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:02:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 582 transitions. [2022-11-23 16:02:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 16:02:29,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:29,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:29,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:02:29,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:29,863 INFO L85 PathProgramCache]: Analyzing trace with hash -955320964, now seen corresponding path program 1 times [2022-11-23 16:02:29,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:29,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838171297] [2022-11-23 16:02:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:29,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:02:29,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:29,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838171297] [2022-11-23 16:02:29,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838171297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:29,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:29,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111740742] [2022-11-23 16:02:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:29,995 INFO L87 Difference]: Start difference. First operand 407 states and 582 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 16:02:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:30,144 INFO L93 Difference]: Finished difference Result 570 states and 800 transitions. [2022-11-23 16:02:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:30,145 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-23 16:02:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:30,151 INFO L225 Difference]: With dead ends: 570 [2022-11-23 16:02:30,151 INFO L226 Difference]: Without dead ends: 412 [2022-11-23 16:02:30,152 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 [2022-11-23 16:02:30,153 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 32 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:30,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 607 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:02:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-23 16:02:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 401. [2022-11-23 16:02:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 331 states have (on average 1.43202416918429) internal successors, (474), 337 states have internal predecessors, (474), 49 states have call successors, (49), 21 states have call predecessors, (49), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-23 16:02:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 568 transitions. [2022-11-23 16:02:30,206 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 568 transitions. Word has length 43 [2022-11-23 16:02:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:30,207 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 568 transitions. [2022-11-23 16:02:30,207 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 16:02:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 568 transitions. [2022-11-23 16:02:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 16:02:30,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:30,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:30,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:02:30,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash -641038338, now seen corresponding path program 1 times [2022-11-23 16:02:30,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:30,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630574506] [2022-11-23 16:02:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 16:02:30,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:30,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630574506] [2022-11-23 16:02:30,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630574506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:30,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:30,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:30,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762532014] [2022-11-23 16:02:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:30,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:30,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:30,297 INFO L87 Difference]: Start difference. First operand 401 states and 568 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:02:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:30,454 INFO L93 Difference]: Finished difference Result 650 states and 892 transitions. [2022-11-23 16:02:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-23 16:02:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:30,461 INFO L225 Difference]: With dead ends: 650 [2022-11-23 16:02:30,462 INFO L226 Difference]: Without dead ends: 447 [2022-11-23 16:02:30,463 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 [2022-11-23 16:02:30,465 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 310 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:30,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 343 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:02:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-23 16:02:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2022-11-23 16:02:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 370 states have (on average 1.3972972972972972) internal successors, (517), 376 states have internal predecessors, (517), 53 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-23 16:02:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 619 transitions. [2022-11-23 16:02:30,512 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 619 transitions. Word has length 46 [2022-11-23 16:02:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:30,513 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 619 transitions. [2022-11-23 16:02:30,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:02:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 619 transitions. [2022-11-23 16:02:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 16:02:30,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:30,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:30,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:02:30,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash -431697521, now seen corresponding path program 1 times [2022-11-23 16:02:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:30,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619582798] [2022-11-23 16:02:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:02:30,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:30,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619582798] [2022-11-23 16:02:30,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619582798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:30,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:30,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:02:30,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571907461] [2022-11-23 16:02:30,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:30,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:02:30,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:02:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:02:30,618 INFO L87 Difference]: Start difference. First operand 447 states and 619 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:02:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:30,913 INFO L93 Difference]: Finished difference Result 674 states and 919 transitions. [2022-11-23 16:02:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:02:30,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-11-23 16:02:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:30,919 INFO L225 Difference]: With dead ends: 674 [2022-11-23 16:02:30,919 INFO L226 Difference]: Without dead ends: 445 [2022-11-23 16:02:30,920 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 [2022-11-23 16:02:30,925 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 365 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:30,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 568 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:02:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-23 16:02:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2022-11-23 16:02:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 366 states have (on average 1.3688524590163935) internal successors, (501), 372 states have internal predecessors, (501), 53 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-23 16:02:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 603 transitions. [2022-11-23 16:02:30,966 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 603 transitions. Word has length 47 [2022-11-23 16:02:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:30,967 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 603 transitions. [2022-11-23 16:02:30,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:02:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 603 transitions. [2022-11-23 16:02:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 16:02:30,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:30,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:30,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:02:30,970 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:30,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:30,971 INFO L85 PathProgramCache]: Analyzing trace with hash 441141134, now seen corresponding path program 1 times [2022-11-23 16:02:30,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:30,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599794879] [2022-11-23 16:02:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:30,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:02:31,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:31,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599794879] [2022-11-23 16:02:31,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599794879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:31,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:31,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:02:31,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354538564] [2022-11-23 16:02:31,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:31,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:02:31,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:02:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:02:31,112 INFO L87 Difference]: Start difference. First operand 443 states and 603 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 16:02:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:31,378 INFO L93 Difference]: Finished difference Result 479 states and 644 transitions. [2022-11-23 16:02:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:02:31,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-11-23 16:02:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:31,382 INFO L225 Difference]: With dead ends: 479 [2022-11-23 16:02:31,382 INFO L226 Difference]: Without dead ends: 476 [2022-11-23 16:02:31,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:02:31,383 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 560 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:31,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 336 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:02:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-23 16:02:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 442. [2022-11-23 16:02:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 366 states have (on average 1.3633879781420766) internal successors, (499), 371 states have internal predecessors, (499), 52 states have call successors, (52), 24 states have call predecessors, (52), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-23 16:02:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 600 transitions. [2022-11-23 16:02:31,444 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 600 transitions. Word has length 47 [2022-11-23 16:02:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:31,444 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 600 transitions. [2022-11-23 16:02:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 16:02:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 600 transitions. [2022-11-23 16:02:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 16:02:31,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:31,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:31,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:02:31,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash 789125729, now seen corresponding path program 1 times [2022-11-23 16:02:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238411440] [2022-11-23 16:02:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:31,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:02:31,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238411440] [2022-11-23 16:02:31,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238411440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:02:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961481242] [2022-11-23 16:02:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:31,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:02:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:02:31,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:02:31,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:02:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:31,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:02:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:02:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:02:32,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:02:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:02:32,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961481242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:02:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463434337] [2022-11-23 16:02:32,212 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-23 16:02:32,212 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:02:32,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:02:32,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:02:32,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:02:38,276 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 175 for LOIs [2022-11-23 16:02:38,303 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 190 for LOIs [2022-11-23 16:02:38,336 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 396 for LOIs [2022-11-23 16:02:41,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:03:06,115 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 403 DAG size of output: 311 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:20,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9994#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~t11_i~0 0) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 16:03:20,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:03:20,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:03:20,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 16:03:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163553143] [2022-11-23 16:03:20,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:03:20,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:03:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:03:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 16:03:20,293 INFO L87 Difference]: Start difference. First operand 442 states and 600 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:03:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:20,798 INFO L93 Difference]: Finished difference Result 843 states and 1098 transitions. [2022-11-23 16:03:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:03:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-23 16:03:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:20,804 INFO L225 Difference]: With dead ends: 843 [2022-11-23 16:03:20,804 INFO L226 Difference]: Without dead ends: 840 [2022-11-23 16:03:20,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 16:03:20,806 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 690 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:20,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1180 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:03:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-23 16:03:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 641. [2022-11-23 16:03:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 533 states have (on average 1.3320825515947468) internal successors, (710), 540 states have internal predecessors, (710), 71 states have call successors, (71), 37 states have call predecessors, (71), 35 states have return successors, (68), 64 states have call predecessors, (68), 68 states have call successors, (68) [2022-11-23 16:03:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 849 transitions. [2022-11-23 16:03:20,870 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 849 transitions. Word has length 48 [2022-11-23 16:03:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:20,870 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 849 transitions. [2022-11-23 16:03:20,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:03:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 849 transitions. [2022-11-23 16:03:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 16:03:20,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:20,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:20,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:21,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:21,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 230886834, now seen corresponding path program 2 times [2022-11-23 16:03:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:21,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401188556] [2022-11-23 16:03:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:21,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 16:03:21,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:21,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401188556] [2022-11-23 16:03:21,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401188556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:21,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:21,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:03:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598153778] [2022-11-23 16:03:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:03:21,178 INFO L87 Difference]: Start difference. First operand 641 states and 849 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 16:03:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:21,328 INFO L93 Difference]: Finished difference Result 947 states and 1234 transitions. [2022-11-23 16:03:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-11-23 16:03:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:21,334 INFO L225 Difference]: With dead ends: 947 [2022-11-23 16:03:21,334 INFO L226 Difference]: Without dead ends: 585 [2022-11-23 16:03:21,335 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 [2022-11-23 16:03:21,338 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 321 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:21,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 352 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-23 16:03:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 582. [2022-11-23 16:03:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 484 states have (on average 1.322314049586777) internal successors, (640), 492 states have internal predecessors, (640), 65 states have call successors, (65), 33 states have call predecessors, (65), 31 states have return successors, (62), 57 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-23 16:03:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 767 transitions. [2022-11-23 16:03:21,386 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 767 transitions. Word has length 61 [2022-11-23 16:03:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:21,386 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 767 transitions. [2022-11-23 16:03:21,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 16:03:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 767 transitions. [2022-11-23 16:03:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 16:03:21,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:21,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:21,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:03:21,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash 472381172, now seen corresponding path program 1 times [2022-11-23 16:03:21,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:21,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21280727] [2022-11-23 16:03:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:21,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:03:21,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21280727] [2022-11-23 16:03:21,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21280727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:21,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:21,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:03:21,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575400541] [2022-11-23 16:03:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:21,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:03:21,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:03:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:03:21,509 INFO L87 Difference]: Start difference. First operand 582 states and 767 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 16:03:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:21,966 INFO L93 Difference]: Finished difference Result 920 states and 1316 transitions. [2022-11-23 16:03:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:03:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-11-23 16:03:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:21,970 INFO L225 Difference]: With dead ends: 920 [2022-11-23 16:03:21,970 INFO L226 Difference]: Without dead ends: 745 [2022-11-23 16:03:21,971 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 [2022-11-23 16:03:21,971 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 542 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:21,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 865 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:03:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-23 16:03:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 744. [2022-11-23 16:03:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 619 states have (on average 1.3602584814216478) internal successors, (842), 628 states have internal predecessors, (842), 86 states have call successors, (86), 39 states have call predecessors, (86), 37 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-23 16:03:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1011 transitions. [2022-11-23 16:03:22,064 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1011 transitions. Word has length 65 [2022-11-23 16:03:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:22,065 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1011 transitions. [2022-11-23 16:03:22,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 16:03:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1011 transitions. [2022-11-23 16:03:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 16:03:22,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:22,067 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:22,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:03:22,068 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash -418493560, now seen corresponding path program 1 times [2022-11-23 16:03:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:22,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550915742] [2022-11-23 16:03:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:22,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:03:22,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550915742] [2022-11-23 16:03:22,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550915742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484722875] [2022-11-23 16:03:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:22,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:22,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:03:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:22,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:22,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:03:22,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:22,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484722875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:22,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:22,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 16:03:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244057821] [2022-11-23 16:03:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:22,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:22,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:22,404 INFO L87 Difference]: Start difference. First operand 744 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 16:03:22,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:22,546 INFO L93 Difference]: Finished difference Result 838 states and 1125 transitions. [2022-11-23 16:03:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:22,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-23 16:03:22,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:22,548 INFO L225 Difference]: With dead ends: 838 [2022-11-23 16:03:22,549 INFO L226 Difference]: Without dead ends: 343 [2022-11-23 16:03:22,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:22,551 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 24 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:22,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 573 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-23 16:03:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2022-11-23 16:03:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 282 states have (on average 1.5141843971631206) internal successors, (427), 285 states have internal predecessors, (427), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 16:03:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 521 transitions. [2022-11-23 16:03:22,580 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 521 transitions. Word has length 73 [2022-11-23 16:03:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:22,581 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 521 transitions. [2022-11-23 16:03:22,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 16:03:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 521 transitions. [2022-11-23 16:03:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:03:22,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:22,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:22,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:22,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:22,797 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash 744239700, now seen corresponding path program 1 times [2022-11-23 16:03:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:22,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035303723] [2022-11-23 16:03:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:03:22,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:22,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035303723] [2022-11-23 16:03:22,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035303723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903358498] [2022-11-23 16:03:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:22,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:22,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:22,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:22,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:03:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:23,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 16:03:23,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:23,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903358498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:23,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:23,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:03:23,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768161594] [2022-11-23 16:03:23,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:23,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:23,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:23,300 INFO L87 Difference]: Start difference. First operand 343 states and 521 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:23,485 INFO L93 Difference]: Finished difference Result 1010 states and 1562 transitions. [2022-11-23 16:03:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:23,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:03:23,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:23,489 INFO L225 Difference]: With dead ends: 1010 [2022-11-23 16:03:23,489 INFO L226 Difference]: Without dead ends: 673 [2022-11-23 16:03:23,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:23,492 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 242 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:23,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 502 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-23 16:03:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 667. [2022-11-23 16:03:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 554 states have (on average 1.5126353790613718) internal successors, (838), 558 states have internal predecessors, (838), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-23 16:03:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1012 transitions. [2022-11-23 16:03:23,553 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1012 transitions. Word has length 130 [2022-11-23 16:03:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:23,553 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1012 transitions. [2022-11-23 16:03:23,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1012 transitions. [2022-11-23 16:03:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:03:23,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:23,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:23,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:23,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 16:03:23,764 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2071216850, now seen corresponding path program 1 times [2022-11-23 16:03:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690666762] [2022-11-23 16:03:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:23,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:03:23,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:23,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690666762] [2022-11-23 16:03:23,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690666762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:23,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870672150] [2022-11-23 16:03:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:23,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:23,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:23,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:03:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 16:03:24,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:24,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870672150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:24,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:24,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:03:24,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368360097] [2022-11-23 16:03:24,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:24,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:24,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:24,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:24,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:24,244 INFO L87 Difference]: Start difference. First operand 667 states and 1012 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:24,472 INFO L93 Difference]: Finished difference Result 1976 states and 3051 transitions. [2022-11-23 16:03:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:24,473 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:03:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:24,480 INFO L225 Difference]: With dead ends: 1976 [2022-11-23 16:03:24,480 INFO L226 Difference]: Without dead ends: 1315 [2022-11-23 16:03:24,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:24,484 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 251 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:24,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 490 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-23 16:03:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1307. [2022-11-23 16:03:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1092 states have (on average 1.5091575091575091) internal successors, (1648), 1098 states have internal predecessors, (1648), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-23 16:03:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1978 transitions. [2022-11-23 16:03:24,601 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1978 transitions. Word has length 130 [2022-11-23 16:03:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:24,602 INFO L495 AbstractCegarLoop]: Abstraction has 1307 states and 1978 transitions. [2022-11-23 16:03:24,602 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1978 transitions. [2022-11-23 16:03:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:03:24,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:24,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:24,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:24,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 16:03:24,817 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:24,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2056511508, now seen corresponding path program 1 times [2022-11-23 16:03:24,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:24,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416674163] [2022-11-23 16:03:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:03:25,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:25,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416674163] [2022-11-23 16:03:25,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416674163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:25,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153944594] [2022-11-23 16:03:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:25,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:25,011 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:25,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:03:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 16:03:25,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:25,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153944594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:25,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:25,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:03:25,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860090678] [2022-11-23 16:03:25,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:25,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:25,319 INFO L87 Difference]: Start difference. First operand 1307 states and 1978 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:25,648 INFO L93 Difference]: Finished difference Result 3884 states and 5979 transitions. [2022-11-23 16:03:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:25,649 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:03:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:25,662 INFO L225 Difference]: With dead ends: 3884 [2022-11-23 16:03:25,662 INFO L226 Difference]: Without dead ends: 2583 [2022-11-23 16:03:25,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:25,668 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 245 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:25,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 474 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2022-11-23 16:03:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2571. [2022-11-23 16:03:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2156 states have (on average 1.5046382189239331) internal successors, (3244), 2166 states have internal predecessors, (3244), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-23 16:03:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 3878 transitions. [2022-11-23 16:03:25,897 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 3878 transitions. Word has length 130 [2022-11-23 16:03:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:25,897 INFO L495 AbstractCegarLoop]: Abstraction has 2571 states and 3878 transitions. [2022-11-23 16:03:25,897 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 3878 transitions. [2022-11-23 16:03:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:03:25,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:25,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:25,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:26,111 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1141172522, now seen corresponding path program 1 times [2022-11-23 16:03:26,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:26,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822957304] [2022-11-23 16:03:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:03:26,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822957304] [2022-11-23 16:03:26,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822957304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639851626] [2022-11-23 16:03:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:26,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:26,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:26,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:03:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:03:26,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:26,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639851626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:26,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:26,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:03:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591480432] [2022-11-23 16:03:26,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:26,645 INFO L87 Difference]: Start difference. First operand 2571 states and 3878 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:27,158 INFO L93 Difference]: Finished difference Result 7652 states and 11735 transitions. [2022-11-23 16:03:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:27,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:03:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:27,191 INFO L225 Difference]: With dead ends: 7652 [2022-11-23 16:03:27,191 INFO L226 Difference]: Without dead ends: 5087 [2022-11-23 16:03:27,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:27,239 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 236 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:27,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 463 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5087 states. [2022-11-23 16:03:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5087 to 5067. [2022-11-23 16:03:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 4260 states have (on average 1.4995305164319248) internal successors, (6388), 4278 states have internal predecessors, (6388), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-23 16:03:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 7614 transitions. [2022-11-23 16:03:27,691 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 7614 transitions. Word has length 130 [2022-11-23 16:03:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:27,691 INFO L495 AbstractCegarLoop]: Abstraction has 5067 states and 7614 transitions. [2022-11-23 16:03:27,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 7614 transitions. [2022-11-23 16:03:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:03:27,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:27,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:27,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:27,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:03:27,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash 9493972, now seen corresponding path program 1 times [2022-11-23 16:03:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:27,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814875578] [2022-11-23 16:03:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:03:28,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814875578] [2022-11-23 16:03:28,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814875578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946544887] [2022-11-23 16:03:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:28,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:28,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:28,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:03:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:28,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 16:03:28,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:28,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946544887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:28,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:03:28,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528726551] [2022-11-23 16:03:28,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:28,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:28,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:28,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:28,482 INFO L87 Difference]: Start difference. First operand 5067 states and 7614 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:29,445 INFO L93 Difference]: Finished difference Result 15092 states and 23047 transitions. [2022-11-23 16:03:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:03:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:29,512 INFO L225 Difference]: With dead ends: 15092 [2022-11-23 16:03:29,512 INFO L226 Difference]: Without dead ends: 10031 [2022-11-23 16:03:29,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:29,531 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 230 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:29,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 463 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10031 states. [2022-11-23 16:03:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10031 to 9995. [2022-11-23 16:03:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9995 states, 8420 states have (on average 1.494061757719715) internal successors, (12580), 8454 states have internal predecessors, (12580), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-23 16:03:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9995 states to 9995 states and 14958 transitions. [2022-11-23 16:03:30,703 INFO L78 Accepts]: Start accepts. Automaton has 9995 states and 14958 transitions. Word has length 130 [2022-11-23 16:03:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:30,704 INFO L495 AbstractCegarLoop]: Abstraction has 9995 states and 14958 transitions. [2022-11-23 16:03:30,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 9995 states and 14958 transitions. [2022-11-23 16:03:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:03:30,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:30,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:30,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:30,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 16:03:30,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1093715118, now seen corresponding path program 1 times [2022-11-23 16:03:30,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:30,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208652230] [2022-11-23 16:03:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:30,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:03:31,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208652230] [2022-11-23 16:03:31,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208652230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602154930] [2022-11-23 16:03:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:31,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:31,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:31,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:31,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 16:03:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:03:31,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:31,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602154930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:31,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:31,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:03:31,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776793933] [2022-11-23 16:03:31,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:31,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:31,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:31,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:31,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:31,413 INFO L87 Difference]: Start difference. First operand 9995 states and 14958 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:33,136 INFO L93 Difference]: Finished difference Result 29780 states and 45271 transitions. [2022-11-23 16:03:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:33,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:03:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:33,229 INFO L225 Difference]: With dead ends: 29780 [2022-11-23 16:03:33,229 INFO L226 Difference]: Without dead ends: 19791 [2022-11-23 16:03:33,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:33,262 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 224 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:33,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 463 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19791 states. [2022-11-23 16:03:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19791 to 19723. [2022-11-23 16:03:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19723 states, 16644 states have (on average 1.4883441480413362) internal successors, (24772), 16710 states have internal predecessors, (24772), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-23 16:03:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19723 states to 19723 states and 29390 transitions. [2022-11-23 16:03:35,471 INFO L78 Accepts]: Start accepts. Automaton has 19723 states and 29390 transitions. Word has length 130 [2022-11-23 16:03:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:35,472 INFO L495 AbstractCegarLoop]: Abstraction has 19723 states and 29390 transitions. [2022-11-23 16:03:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:03:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19723 states and 29390 transitions. [2022-11-23 16:03:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:03:35,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:35,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:35,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:35,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 16:03:35,716 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash 747179856, now seen corresponding path program 1 times [2022-11-23 16:03:35,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:35,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025540792] [2022-11-23 16:03:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:35,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 16:03:36,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025540792] [2022-11-23 16:03:36,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025540792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:36,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:36,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:03:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164882543] [2022-11-23 16:03:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:36,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:03:36,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:03:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:36,237 INFO L87 Difference]: Start difference. First operand 19723 states and 29390 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 16:03:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:40,347 INFO L93 Difference]: Finished difference Result 68627 states and 102229 transitions. [2022-11-23 16:03:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:03:40,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-23 16:03:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:40,568 INFO L225 Difference]: With dead ends: 68627 [2022-11-23 16:03:40,568 INFO L226 Difference]: Without dead ends: 48911 [2022-11-23 16:03:40,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:03:40,631 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 1005 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:40,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 809 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:03:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48911 states. [2022-11-23 16:03:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48911 to 38667. [2022-11-23 16:03:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38667 states, 32644 states have (on average 1.4822938365396396) internal successors, (48388), 32774 states have internal predecessors, (48388), 4486 states have call successors, (4486), 1537 states have call predecessors, (4486), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2022-11-23 16:03:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38667 states to 38667 states and 57358 transitions. [2022-11-23 16:03:44,686 INFO L78 Accepts]: Start accepts. Automaton has 38667 states and 57358 transitions. Word has length 130 [2022-11-23 16:03:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:44,694 INFO L495 AbstractCegarLoop]: Abstraction has 38667 states and 57358 transitions. [2022-11-23 16:03:44,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 16:03:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 38667 states and 57358 transitions. [2022-11-23 16:03:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-23 16:03:44,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:44,755 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:44,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 16:03:44,755 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1629642652, now seen corresponding path program 1 times [2022-11-23 16:03:44,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:44,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780779996] [2022-11-23 16:03:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:03:45,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:45,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780779996] [2022-11-23 16:03:45,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780779996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:45,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079050351] [2022-11-23 16:03:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:45,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:45,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:45,079 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:45,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 16:03:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 16:03:45,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:45,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079050351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:45,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:45,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 16:03:45,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276350195] [2022-11-23 16:03:45,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:45,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:45,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:45,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:03:45,380 INFO L87 Difference]: Start difference. First operand 38667 states and 57358 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 16:03:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:49,238 INFO L93 Difference]: Finished difference Result 68687 states and 103633 transitions. [2022-11-23 16:03:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 151 [2022-11-23 16:03:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:49,452 INFO L225 Difference]: With dead ends: 68687 [2022-11-23 16:03:49,452 INFO L226 Difference]: Without dead ends: 48843 [2022-11-23 16:03:49,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:03:49,507 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 116 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:49,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:03:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48843 states. [2022-11-23 16:03:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48843 to 45963. [2022-11-23 16:03:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45963 states, 39684 states have (on average 1.5257534522729563) internal successors, (60548), 39814 states have internal predecessors, (60548), 4614 states have call successors, (4614), 1665 states have call predecessors, (4614), 1664 states have return successors, (4612), 4484 states have call predecessors, (4612), 4612 states have call successors, (4612) [2022-11-23 16:03:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45963 states to 45963 states and 69774 transitions. [2022-11-23 16:03:54,013 INFO L78 Accepts]: Start accepts. Automaton has 45963 states and 69774 transitions. Word has length 151 [2022-11-23 16:03:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:54,013 INFO L495 AbstractCegarLoop]: Abstraction has 45963 states and 69774 transitions. [2022-11-23 16:03:54,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 16:03:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 45963 states and 69774 transitions. [2022-11-23 16:03:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-23 16:03:54,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:54,145 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:54,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:54,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:54,351 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1281555938, now seen corresponding path program 1 times [2022-11-23 16:03:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:54,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131549976] [2022-11-23 16:03:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-23 16:03:54,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:54,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131549976] [2022-11-23 16:03:54,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131549976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:54,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879941172] [2022-11-23 16:03:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:54,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:54,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:54,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:54,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5047ac-b43b-403d-87a9-1b3c1b303560/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 16:03:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:03:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 16:03:55,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:55,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879941172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:55,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:55,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-11-23 16:03:55,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821220480] [2022-11-23 16:03:55,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:55,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:03:55,254 INFO L87 Difference]: Start difference. First operand 45963 states and 69774 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 16:04:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:02,071 INFO L93 Difference]: Finished difference Result 137108 states and 210711 transitions. [2022-11-23 16:04:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:04:02,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 198 [2022-11-23 16:04:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:02,631 INFO L225 Difference]: With dead ends: 137108 [2022-11-23 16:04:02,632 INFO L226 Difference]: Without dead ends: 91151 [2022-11-23 16:04:02,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:04:02,756 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 180 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:02,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 463 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:04:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91151 states.