./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0451b84ecb7a9b49daa0d007f78b5b7787a8fa890fb4c838a3b9a1c5be28a03a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:43:05,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:43:05,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:43:05,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:43:05,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:43:05,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:43:05,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:43:05,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:43:05,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:43:05,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:43:05,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:43:05,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:43:05,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:43:05,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:43:05,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:43:05,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:43:05,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:43:05,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:43:05,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:43:05,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:43:05,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:43:05,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:43:05,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:43:05,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:43:05,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:43:05,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:43:05,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:43:05,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:43:05,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:43:05,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:43:05,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:43:05,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:43:05,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:43:05,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:43:05,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:43:05,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:43:05,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:43:05,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:43:05,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:43:05,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:43:05,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:43:05,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:43:05,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:43:05,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:43:05,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:43:05,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:43:05,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:43:05,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:43:05,743 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:43:05,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:43:05,743 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:43:05,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:43:05,743 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:43:05,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:43:05,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:43:05,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:43:05,744 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:43:05,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:43:05,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:43:05,745 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:43:05,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:43:05,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:43:05,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:43:05,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:43:05,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:43:05,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:43:05,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:43:05,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:43:05,747 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:43:05,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:43:05,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:43:05,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:43:05,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:43:05,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:43:05,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:43:05,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:43:05,748 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:43:05,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:43:05,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:43:05,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:43:05,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:43:05,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:43:05,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:43:05,749 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_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0451b84ecb7a9b49daa0d007f78b5b7787a8fa890fb4c838a3b9a1c5be28a03a [2022-12-14 14:43:05,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:43:05,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:43:05,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:43:05,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:43:05,941 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:43:05,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 14:43:08,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:43:08,671 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:43:08,672 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 14:43:08,678 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/data/c8b4a41f6/11914119ab6f43e19c5835a77fba98ec/FLAG95dfe81ad [2022-12-14 14:43:09,086 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/data/c8b4a41f6/11914119ab6f43e19c5835a77fba98ec [2022-12-14 14:43:09,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:43:09,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:43:09,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:43:09,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:43:09,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:43:09,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7634442e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09, skipping insertion in model container [2022-12-14 14:43:09,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:43:09,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:43:09,291 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_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2022-12-14 14:43:09,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:43:09,323 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:43:09,354 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_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2022-12-14 14:43:09,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:43:09,383 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:43:09,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09 WrapperNode [2022-12-14 14:43:09,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:43:09,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:43:09,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:43:09,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:43:09,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,422 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 316 [2022-12-14 14:43:09,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:43:09,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:43:09,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:43:09,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:43:09,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:43:09,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:43:09,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:43:09,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:43:09,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (1/1) ... [2022-12-14 14:43:09,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:43:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:09,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:43:09,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:43:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:43:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:43:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:43:09,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:43:09,594 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:43:09,596 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:43:09,854 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:43:09,949 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:43:09,949 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 14:43:09,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:43:09 BoogieIcfgContainer [2022-12-14 14:43:09,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:43:09,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:43:09,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:43:09,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:43:09,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:43:09" (1/3) ... [2022-12-14 14:43:09,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f18a6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:43:09, skipping insertion in model container [2022-12-14 14:43:09,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:09" (2/3) ... [2022-12-14 14:43:09,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f18a6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:43:09, skipping insertion in model container [2022-12-14 14:43:09,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:43:09" (3/3) ... [2022-12-14 14:43:09,957 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 14:43:09,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:43:09,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:43:10,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:43:10,010 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;@497f725b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:43:10,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:43:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 58 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 14:43:10,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:10,021 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] [2022-12-14 14:43:10,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1763601530, now seen corresponding path program 1 times [2022-12-14 14:43:10,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:10,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318493747] [2022-12-14 14:43:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:10,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:10,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318493747] [2022-12-14 14:43:10,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318493747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:10,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:10,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:43:10,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107313103] [2022-12-14 14:43:10,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:10,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:10,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:10,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:10,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:10,305 INFO L87 Difference]: Start difference. First operand has 59 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 58 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:10,379 INFO L93 Difference]: Finished difference Result 133 states and 202 transitions. [2022-12-14 14:43:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:10,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 14:43:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:10,390 INFO L225 Difference]: With dead ends: 133 [2022-12-14 14:43:10,390 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 14:43:10,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:10,395 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 66 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:10,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 180 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:43:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 14:43:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-12-14 14:43:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 86 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2022-12-14 14:43:10,433 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 28 [2022-12-14 14:43:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:10,434 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2022-12-14 14:43:10,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2022-12-14 14:43:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 14:43:10,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:10,436 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] [2022-12-14 14:43:10,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:43:10,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash -943677467, now seen corresponding path program 1 times [2022-12-14 14:43:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:10,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162242969] [2022-12-14 14:43:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:10,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:10,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162242969] [2022-12-14 14:43:10,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162242969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:10,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:10,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:43:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373404487] [2022-12-14 14:43:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:10,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:10,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:10,529 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:10,580 INFO L93 Difference]: Finished difference Result 201 states and 288 transitions. [2022-12-14 14:43:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 14:43:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:10,582 INFO L225 Difference]: With dead ends: 201 [2022-12-14 14:43:10,582 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 14:43:10,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:10,584 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 49 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:10,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:43:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 14:43:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-12-14 14:43:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4153846153846155) internal successors, (184), 130 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 184 transitions. [2022-12-14 14:43:10,608 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 184 transitions. Word has length 30 [2022-12-14 14:43:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:10,608 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 184 transitions. [2022-12-14 14:43:10,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 184 transitions. [2022-12-14 14:43:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 14:43:10,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:10,609 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] [2022-12-14 14:43:10,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:43:10,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:10,610 INFO L85 PathProgramCache]: Analyzing trace with hash 233057630, now seen corresponding path program 1 times [2022-12-14 14:43:10,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:10,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136682689] [2022-12-14 14:43:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:10,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:10,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136682689] [2022-12-14 14:43:10,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136682689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:10,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:10,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:43:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362084599] [2022-12-14 14:43:10,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:10,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:10,685 INFO L87 Difference]: Start difference. First operand 131 states and 184 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:10,744 INFO L93 Difference]: Finished difference Result 311 states and 446 transitions. [2022-12-14 14:43:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 14:43:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:10,747 INFO L225 Difference]: With dead ends: 311 [2022-12-14 14:43:10,747 INFO L226 Difference]: Without dead ends: 199 [2022-12-14 14:43:10,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:10,749 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:10,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 119 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:43:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-12-14 14:43:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2022-12-14 14:43:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 196 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 276 transitions. [2022-12-14 14:43:10,772 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 276 transitions. Word has length 33 [2022-12-14 14:43:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:10,772 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 276 transitions. [2022-12-14 14:43:10,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 276 transitions. [2022-12-14 14:43:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 14:43:10,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:10,773 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] [2022-12-14 14:43:10,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:43:10,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash 579194634, now seen corresponding path program 1 times [2022-12-14 14:43:10,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:10,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135412616] [2022-12-14 14:43:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:10,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:10,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135412616] [2022-12-14 14:43:10,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135412616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:10,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:43:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222759744] [2022-12-14 14:43:10,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:10,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:43:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:43:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:43:10,859 INFO L87 Difference]: Start difference. First operand 197 states and 276 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:10,981 INFO L93 Difference]: Finished difference Result 643 states and 911 transitions. [2022-12-14 14:43:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:43:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 14:43:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:10,983 INFO L225 Difference]: With dead ends: 643 [2022-12-14 14:43:10,983 INFO L226 Difference]: Without dead ends: 465 [2022-12-14 14:43:10,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:43:10,984 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 117 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:10,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 218 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:43:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-12-14 14:43:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 461. [2022-12-14 14:43:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4086956521739131) internal successors, (648), 460 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 648 transitions. [2022-12-14 14:43:11,058 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 648 transitions. Word has length 36 [2022-12-14 14:43:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:11,058 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 648 transitions. [2022-12-14 14:43:11,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 648 transitions. [2022-12-14 14:43:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 14:43:11,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:11,059 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] [2022-12-14 14:43:11,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:43:11,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash 518999987, now seen corresponding path program 1 times [2022-12-14 14:43:11,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751491594] [2022-12-14 14:43:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:11,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:11,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:11,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751491594] [2022-12-14 14:43:11,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751491594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:11,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:11,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:43:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076991570] [2022-12-14 14:43:11,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:11,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:43:11,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:43:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:43:11,119 INFO L87 Difference]: Start difference. First operand 461 states and 648 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:11,309 INFO L93 Difference]: Finished difference Result 1186 states and 1688 transitions. [2022-12-14 14:43:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:43:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 14:43:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:11,312 INFO L225 Difference]: With dead ends: 1186 [2022-12-14 14:43:11,312 INFO L226 Difference]: Without dead ends: 744 [2022-12-14 14:43:11,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:43:11,313 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 286 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:11,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 82 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-12-14 14:43:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 742. [2022-12-14 14:43:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 1.4062078272604588) internal successors, (1042), 741 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1042 transitions. [2022-12-14 14:43:11,397 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1042 transitions. Word has length 38 [2022-12-14 14:43:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:11,397 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 1042 transitions. [2022-12-14 14:43:11,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1042 transitions. [2022-12-14 14:43:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 14:43:11,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:11,398 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] [2022-12-14 14:43:11,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:43:11,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash 331633624, now seen corresponding path program 1 times [2022-12-14 14:43:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661541920] [2022-12-14 14:43:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:11,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:11,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:11,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661541920] [2022-12-14 14:43:11,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661541920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:11,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:11,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:43:11,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675297826] [2022-12-14 14:43:11,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:11,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:43:11,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:11,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:43:11,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:43:11,617 INFO L87 Difference]: Start difference. First operand 742 states and 1042 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:12,024 INFO L93 Difference]: Finished difference Result 1571 states and 2228 transitions. [2022-12-14 14:43:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 14:43:12,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 14:43:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:12,031 INFO L225 Difference]: With dead ends: 1571 [2022-12-14 14:43:12,031 INFO L226 Difference]: Without dead ends: 1569 [2022-12-14 14:43:12,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:43:12,033 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 443 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:12,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 599 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-12-14 14:43:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 853. [2022-12-14 14:43:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4049295774647887) internal successors, (1197), 852 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1197 transitions. [2022-12-14 14:43:12,153 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1197 transitions. Word has length 38 [2022-12-14 14:43:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:12,153 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1197 transitions. [2022-12-14 14:43:12,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:43:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1197 transitions. [2022-12-14 14:43:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 14:43:12,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:12,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:12,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:43:12,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash 426812810, now seen corresponding path program 1 times [2022-12-14 14:43:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:12,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544650730] [2022-12-14 14:43:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:12,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:12,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544650730] [2022-12-14 14:43:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544650730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471610818] [2022-12-14 14:43:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:12,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:12,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:43:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 14:43:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:14,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:43:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:17,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471610818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:43:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307320436] [2022-12-14 14:43:17,219 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-12-14 14:43:17,219 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:43:17,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:43:17,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:43:17,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:43:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:43:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:43:17,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 14:43:17,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:43:17,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:43:17,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:43:17,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 14:44:56,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:45:07,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10833#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~p3~0 0) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~p1_old~0 1)) (<= 0 ~id1~0) (<= 0 ~__return_6075~0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= |#NULL.base| 0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~__return_6075~0 1) (<= ~p2~0 0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= ~__return_5979~0 1) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= 1 ~__return_5979~0))' at error location [2022-12-14 14:45:07,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:45:07,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:45:07,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2022-12-14 14:45:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797521284] [2022-12-14 14:45:07,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:45:07,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 14:45:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 14:45:07,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=4722, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 14:45:07,664 INFO L87 Difference]: Start difference. First operand 853 states and 1197 transitions. Second operand has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:34,865 INFO L93 Difference]: Finished difference Result 9029 states and 12667 transitions. [2022-12-14 14:45:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-12-14 14:45:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 14:45:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:34,885 INFO L225 Difference]: With dead ends: 9029 [2022-12-14 14:45:34,885 INFO L226 Difference]: Without dead ends: 7758 [2022-12-14 14:45:34,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23270 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=8302, Invalid=45754, Unknown=0, NotChecked=0, Total=54056 [2022-12-14 14:45:34,895 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 6460 mSDsluCounter, 2425 mSDsCounter, 0 mSdLazyCounter, 3742 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6460 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 4084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 3742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:34,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6460 Valid, 2564 Invalid, 4084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 3742 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 14:45:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7758 states. [2022-12-14 14:45:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7758 to 4088. [2022-12-14 14:45:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 1.3650599461707855) internal successors, (5579), 4087 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 5579 transitions. [2022-12-14 14:45:36,025 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 5579 transitions. Word has length 46 [2022-12-14 14:45:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:36,025 INFO L495 AbstractCegarLoop]: Abstraction has 4088 states and 5579 transitions. [2022-12-14 14:45:36,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 5579 transitions. [2022-12-14 14:45:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 14:45:36,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:36,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:36,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:45:36,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:36,229 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:36,230 INFO L85 PathProgramCache]: Analyzing trace with hash -893068205, now seen corresponding path program 1 times [2022-12-14 14:45:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:36,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919956528] [2022-12-14 14:45:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:36,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:45:36,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:36,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919956528] [2022-12-14 14:45:36,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919956528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:36,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:36,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:36,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849584463] [2022-12-14 14:45:36,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:36,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:36,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:36,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:36,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:36,318 INFO L87 Difference]: Start difference. First operand 4088 states and 5579 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:38,040 INFO L93 Difference]: Finished difference Result 10038 states and 13794 transitions. [2022-12-14 14:45:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:38,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 14:45:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:38,051 INFO L225 Difference]: With dead ends: 10038 [2022-12-14 14:45:38,051 INFO L226 Difference]: Without dead ends: 6017 [2022-12-14 14:45:38,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:38,055 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 265 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 92 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 [2022-12-14 14:45:38,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2022-12-14 14:45:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5943. [2022-12-14 14:45:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5943 states, 5942 states have (on average 1.3648603163917872) internal successors, (8110), 5942 states have internal predecessors, (8110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5943 states to 5943 states and 8110 transitions. [2022-12-14 14:45:39,600 INFO L78 Accepts]: Start accepts. Automaton has 5943 states and 8110 transitions. Word has length 46 [2022-12-14 14:45:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:39,600 INFO L495 AbstractCegarLoop]: Abstraction has 5943 states and 8110 transitions. [2022-12-14 14:45:39,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 5943 states and 8110 transitions. [2022-12-14 14:45:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 14:45:39,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:39,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:39,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:45:39,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash 733096462, now seen corresponding path program 1 times [2022-12-14 14:45:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:39,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800700367] [2022-12-14 14:45:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:39,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:40,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800700367] [2022-12-14 14:45:40,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800700367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956931177] [2022-12-14 14:45:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:40,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:40,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:40,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:40,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:45:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:40,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 14:45:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:40,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:45:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:44,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956931177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:45:44,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831575093] [2022-12-14 14:45:44,212 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-12-14 14:45:44,213 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:45:44,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:45:44,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:45:44,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:45:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:45:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:45:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:45:44,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 14:45:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:45:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:45:44,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 14:49:37,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:49:48,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58863#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send3~0 127) (<= ~p3~0 0) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 |#NULL.base|) (<= ~st3~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~p1_old~0 1)) (<= 0 ~id1~0) (<= 0 ~__return_6075~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= 0 ~send2~0) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= |#NULL.base| 0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~__return_6075~0 1) (<= ~p2~0 0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (<= 0 ~send3~0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= ~__return_5979~0 1) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= 1 ~__return_5979~0))' at error location [2022-12-14 14:49:48,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:49:48,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:49:48,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-12-14 14:49:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236251120] [2022-12-14 14:49:48,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:49:48,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 14:49:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:49:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 14:49:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=4528, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 14:49:48,856 INFO L87 Difference]: Start difference. First operand 5943 states and 8110 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:27,016 INFO L93 Difference]: Finished difference Result 33523 states and 45609 transitions. [2022-12-14 14:50:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-12-14 14:50:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 14:50:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:27,080 INFO L225 Difference]: With dead ends: 33523 [2022-12-14 14:50:27,080 INFO L226 Difference]: Without dead ends: 29113 [2022-12-14 14:50:27,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30597 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=11138, Invalid=58294, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 14:50:27,093 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 7824 mSDsluCounter, 2658 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7824 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 4174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:27,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7824 Valid, 2814 Invalid, 4174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 14:50:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29113 states. [2022-12-14 14:50:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29113 to 16469. [2022-12-14 14:50:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16469 states, 16468 states have (on average 1.3589385474860336) internal successors, (22379), 16468 states have internal predecessors, (22379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16469 states to 16469 states and 22379 transitions. [2022-12-14 14:50:32,200 INFO L78 Accepts]: Start accepts. Automaton has 16469 states and 22379 transitions. Word has length 46 [2022-12-14 14:50:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:32,200 INFO L495 AbstractCegarLoop]: Abstraction has 16469 states and 22379 transitions. [2022-12-14 14:50:32,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 16469 states and 22379 transitions. [2022-12-14 14:50:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:50:32,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:32,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:32,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:50:32,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:32,403 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash 296484125, now seen corresponding path program 1 times [2022-12-14 14:50:32,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:32,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776417133] [2022-12-14 14:50:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:50:32,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:32,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776417133] [2022-12-14 14:50:32,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776417133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:50:32,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:50:32,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:50:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30364047] [2022-12-14 14:50:32,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:50:32,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:50:32,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:50:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:50:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:50:32,485 INFO L87 Difference]: Start difference. First operand 16469 states and 22379 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:37,857 INFO L93 Difference]: Finished difference Result 33096 states and 45089 transitions. [2022-12-14 14:50:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:50:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 14:50:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:37,879 INFO L225 Difference]: With dead ends: 33096 [2022-12-14 14:50:37,879 INFO L226 Difference]: Without dead ends: 17008 [2022-12-14 14:50:37,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:50:37,890 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 283 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:37,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 81 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:50:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17008 states. [2022-12-14 14:50:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17008 to 17006. [2022-12-14 14:50:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17006 states, 17005 states have (on average 1.3501323140252868) internal successors, (22959), 17005 states have internal predecessors, (22959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17006 states to 17006 states and 22959 transitions. [2022-12-14 14:50:43,148 INFO L78 Accepts]: Start accepts. Automaton has 17006 states and 22959 transitions. Word has length 49 [2022-12-14 14:50:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:43,148 INFO L495 AbstractCegarLoop]: Abstraction has 17006 states and 22959 transitions. [2022-12-14 14:50:43,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 17006 states and 22959 transitions. [2022-12-14 14:50:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:50:43,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:43,150 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:43,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:50:43,150 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash 432245336, now seen corresponding path program 1 times [2022-12-14 14:50:43,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:43,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137458224] [2022-12-14 14:50:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:50:43,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:43,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137458224] [2022-12-14 14:50:43,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137458224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:50:43,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969074812] [2022-12-14 14:50:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:43,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:43,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:50:43,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:50:43,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea0b3ecc-a2e7-40f8-b385-2734b134ce1a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:50:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 14:50:44,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:50:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:50:44,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:50:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:50:48,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969074812] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:50:48,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931514793] [2022-12-14 14:50:48,890 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-12-14 14:50:48,891 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:50:48,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:50:48,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:50:48,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:50:49,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:50:49,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:50:49,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:50:49,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 14:50:49,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:50:49,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:50:49,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 14:56:52,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:57:07,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '221322#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send3~0 127) (<= ~p3~0 0) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 |#NULL.base|) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~id1~0) (<= 0 ~__return_6075~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= (+ ~p2_new~0 1) 0) (<= |#NULL.base| 0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~__return_6075~0 1) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= ~__return_5979~0 1) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= 1 ~__return_5979~0))' at error location [2022-12-14 14:57:07,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:57:07,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:57:07,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 48 [2022-12-14 14:57:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875374796] [2022-12-14 14:57:07,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:57:07,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 14:57:07,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:57:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 14:57:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=6406, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 14:57:07,795 INFO L87 Difference]: Start difference. First operand 17006 states and 22959 transitions. Second operand has 48 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)