./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/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_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/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_bfdce698-d894-4298-b3d3-813e59ebda99/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 aaf13b6417c3a40bd252c0d41a10a8dacb34259e9c2292b8e82d477fe2508ef5 --- 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 09:42:03,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:42:03,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:42:03,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:42:03,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:42:03,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:42:03,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:42:03,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:42:03,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:42:03,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:42:03,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:42:03,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:42:03,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:42:03,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:42:03,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:42:03,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:42:03,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:42:03,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:42:03,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:42:03,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:42:03,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:42:03,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:42:03,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:42:03,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:42:03,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:42:03,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:42:03,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:42:03,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:42:03,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:42:03,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:42:03,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:42:03,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:42:03,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:42:03,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:42:03,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:42:03,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:42:03,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:42:03,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:42:03,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:42:03,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:42:03,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:42:03,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:42:03,124 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:42:03,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:42:03,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:42:03,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:42:03,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:42:03,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:42:03,125 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:42:03,125 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:42:03,126 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:42:03,126 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:42:03,127 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:42:03,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:42:03,127 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:42:03,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:42:03,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:42:03,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:42:03,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:42:03,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:42:03,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:42:03,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:42:03,129 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:42:03,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:42:03,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:42:03,129 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:42:03,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:42:03,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:42:03,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:42:03,130 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_bfdce698-d894-4298-b3d3-813e59ebda99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aaf13b6417c3a40bd252c0d41a10a8dacb34259e9c2292b8e82d477fe2508ef5 [2022-12-14 09:42:03,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:42:03,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:42:03,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:42:03,322 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:42:03,322 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:42:03,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c [2022-12-14 09:42:05,917 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:42:06,325 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:42:06,325 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c [2022-12-14 09:42:06,377 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/data/2e84789d4/ba9dea3f618846b3946f6379b4fa834b/FLAG9dceb0e4f [2022-12-14 09:42:06,495 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/data/2e84789d4/ba9dea3f618846b3946f6379b4fa834b [2022-12-14 09:42:06,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:42:06,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:42:06,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:42:06,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:42:06,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:42:06,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:42:06" (1/1) ... [2022-12-14 09:42:06,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509f1b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:06, skipping insertion in model container [2022-12-14 09:42:06,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:42:06" (1/1) ... [2022-12-14 09:42:06,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:42:06,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:42:07,935 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_bfdce698-d894-4298-b3d3-813e59ebda99/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[380593,380606] [2022-12-14 09:42:07,954 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_bfdce698-d894-4298-b3d3-813e59ebda99/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[383339,383352] [2022-12-14 09:42:08,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:42:08,146 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:42:08,948 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_bfdce698-d894-4298-b3d3-813e59ebda99/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[380593,380606] [2022-12-14 09:42:08,951 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_bfdce698-d894-4298-b3d3-813e59ebda99/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[383339,383352] [2022-12-14 09:42:08,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:42:09,003 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:42:09,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09 WrapperNode [2022-12-14 09:42:09,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:42:09,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:42:09,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:42:09,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:42:09,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,337 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 12972 [2022-12-14 09:42:09,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:42:09,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:42:09,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:42:09,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:42:09,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:42:09,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:42:09,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:42:09,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:42:09,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (1/1) ... [2022-12-14 09:42:09,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:42:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:09,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:42:09,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:42:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:42:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 09:42:09,695 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 09:42:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 09:42:09,696 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 09:42:09,696 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 09:42:09,696 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 09:42:09,696 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 09:42:09,696 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 09:42:09,696 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 09:42:09,696 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 09:42:09,697 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 09:42:09,697 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 09:42:09,697 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 09:42:09,697 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 09:42:09,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:42:09,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:42:09,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:42:09,814 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:42:09,817 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:42:15,004 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:42:16,461 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:42:16,461 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-12-14 09:42:16,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:42:16 BoogieIcfgContainer [2022-12-14 09:42:16,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:42:16,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:42:16,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:42:16,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:42:16,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:42:06" (1/3) ... [2022-12-14 09:42:16,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b30a3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:42:16, skipping insertion in model container [2022-12-14 09:42:16,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:42:09" (2/3) ... [2022-12-14 09:42:16,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b30a3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:42:16, skipping insertion in model container [2022-12-14 09:42:16,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:42:16" (3/3) ... [2022-12-14 09:42:16,471 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.08.cil-2.c [2022-12-14 09:42:16,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:42:16,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:42:16,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:42:16,549 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;@6015e1a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:42:16,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 09:42:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 09:42:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 09:42:16,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:16,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:16,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1260476617, now seen corresponding path program 1 times [2022-12-14 09:42:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425514787] [2022-12-14 09:42:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:16,868 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 09:42:16,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:16,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425514787] [2022-12-14 09:42:16,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425514787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:16,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:42:16,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:42:16,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517009642] [2022-12-14 09:42:16,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:42:16,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:42:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:42:16,901 INFO L87 Difference]: Start difference. First operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:42:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:17,595 INFO L93 Difference]: Finished difference Result 3712 states and 7223 transitions. [2022-12-14 09:42:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:42:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-12-14 09:42:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:17,617 INFO L225 Difference]: With dead ends: 3712 [2022-12-14 09:42:17,617 INFO L226 Difference]: Without dead ends: 1918 [2022-12-14 09:42:17,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:42:17,628 INFO L413 NwaCegarLoop]: 3398 mSDtfsCounter, 3655 mSDsluCounter, 3314 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3655 SdHoareTripleChecker+Valid, 6712 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:17,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3655 Valid, 6712 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:42:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-12-14 09:42:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1917. [2022-12-14 09:42:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1861 states have (on average 1.9333691563675444) internal successors, (3598), 1865 states have internal predecessors, (3598), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 09:42:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 3680 transitions. [2022-12-14 09:42:17,733 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 3680 transitions. Word has length 56 [2022-12-14 09:42:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:17,734 INFO L495 AbstractCegarLoop]: Abstraction has 1917 states and 3680 transitions. [2022-12-14 09:42:17,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:42:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 3680 transitions. [2022-12-14 09:42:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 09:42:17,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:17,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:42:17,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 826534316, now seen corresponding path program 1 times [2022-12-14 09:42:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:17,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734522039] [2022-12-14 09:42:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:42:17,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:17,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734522039] [2022-12-14 09:42:17,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734522039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:42:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750609139] [2022-12-14 09:42:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:17,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:17,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:17,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:42:17,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:42:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:42:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:42:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:42:18,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:42:18,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750609139] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:18,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:42:18,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:42:18,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35022354] [2022-12-14 09:42:18,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:18,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:18,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:18,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:18,137 INFO L87 Difference]: Start difference. First operand 1917 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:18,560 INFO L93 Difference]: Finished difference Result 2452 states and 4499 transitions. [2022-12-14 09:42:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-12-14 09:42:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:18,568 INFO L225 Difference]: With dead ends: 2452 [2022-12-14 09:42:18,568 INFO L226 Difference]: Without dead ends: 2181 [2022-12-14 09:42:18,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:18,571 INFO L413 NwaCegarLoop]: 3289 mSDtfsCounter, 3455 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:18,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 3461 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-12-14 09:42:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2175. [2022-12-14 09:42:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2073 states have (on average 1.8876025084418717) internal successors, (3913), 2078 states have internal predecessors, (3913), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 09:42:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 4063 transitions. [2022-12-14 09:42:18,618 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 4063 transitions. Word has length 109 [2022-12-14 09:42:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:18,619 INFO L495 AbstractCegarLoop]: Abstraction has 2175 states and 4063 transitions. [2022-12-14 09:42:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 4063 transitions. [2022-12-14 09:42:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 09:42:18,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:18,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:18,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:42:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:18,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -50292724, now seen corresponding path program 1 times [2022-12-14 09:42:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:18,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736154495] [2022-12-14 09:42:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:42:18,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:18,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736154495] [2022-12-14 09:42:18,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736154495] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:42:18,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914316965] [2022-12-14 09:42:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:18,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:18,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:18,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:42:18,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:42:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:19,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:42:19,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:42:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 09:42:19,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:42:19,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914316965] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:19,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:42:19,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:42:19,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979477443] [2022-12-14 09:42:19,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:19,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:19,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:19,099 INFO L87 Difference]: Start difference. First operand 2175 states and 4063 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:19,507 INFO L93 Difference]: Finished difference Result 3220 states and 5658 transitions. [2022-12-14 09:42:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:19,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-12-14 09:42:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:19,518 INFO L225 Difference]: With dead ends: 3220 [2022-12-14 09:42:19,519 INFO L226 Difference]: Without dead ends: 2691 [2022-12-14 09:42:19,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:19,521 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 3461 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:19,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3460 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-12-14 09:42:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2683. [2022-12-14 09:42:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2491 states have (on average 1.818948213568848) internal successors, (4531), 2498 states have internal predecessors, (4531), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 09:42:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4813 transitions. [2022-12-14 09:42:19,582 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4813 transitions. Word has length 109 [2022-12-14 09:42:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:19,582 INFO L495 AbstractCegarLoop]: Abstraction has 2683 states and 4813 transitions. [2022-12-14 09:42:19,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4813 transitions. [2022-12-14 09:42:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 09:42:19,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:19,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:19,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 09:42:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:19,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1582890604, now seen corresponding path program 1 times [2022-12-14 09:42:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:19,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713336826] [2022-12-14 09:42:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:19,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:42:19,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713336826] [2022-12-14 09:42:19,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713336826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:42:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525769227] [2022-12-14 09:42:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:19,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:19,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:42:19,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:42:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:20,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:42:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:42:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:42:20,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:42:20,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525769227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:20,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:42:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:42:20,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361629513] [2022-12-14 09:42:20,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:20,073 INFO L87 Difference]: Start difference. First operand 2683 states and 4813 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:20,446 INFO L93 Difference]: Finished difference Result 4732 states and 7926 transitions. [2022-12-14 09:42:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:20,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-12-14 09:42:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:20,463 INFO L225 Difference]: With dead ends: 4732 [2022-12-14 09:42:20,464 INFO L226 Difference]: Without dead ends: 3695 [2022-12-14 09:42:20,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:20,470 INFO L413 NwaCegarLoop]: 3287 mSDtfsCounter, 3464 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:20,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3459 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-12-14 09:42:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3683. [2022-12-14 09:42:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3315 states have (on average 1.7324283559577678) internal successors, (5743), 3326 states have internal predecessors, (5743), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-12-14 09:42:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6281 transitions. [2022-12-14 09:42:20,626 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6281 transitions. Word has length 109 [2022-12-14 09:42:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:20,626 INFO L495 AbstractCegarLoop]: Abstraction has 3683 states and 6281 transitions. [2022-12-14 09:42:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6281 transitions. [2022-12-14 09:42:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 09:42:20,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:20,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:20,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:42:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:20,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1937081332, now seen corresponding path program 1 times [2022-12-14 09:42:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:20,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694365633] [2022-12-14 09:42:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:42:20,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:20,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694365633] [2022-12-14 09:42:20,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694365633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:42:20,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271143760] [2022-12-14 09:42:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:20,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:42:20,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:42:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:42:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:42:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:42:21,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:42:21,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271143760] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:21,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:42:21,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:42:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748972823] [2022-12-14 09:42:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:21,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:21,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:21,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:21,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:21,140 INFO L87 Difference]: Start difference. First operand 3683 states and 6281 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:21,611 INFO L93 Difference]: Finished difference Result 7708 states and 12362 transitions. [2022-12-14 09:42:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-12-14 09:42:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:21,638 INFO L225 Difference]: With dead ends: 7708 [2022-12-14 09:42:21,638 INFO L226 Difference]: Without dead ends: 5671 [2022-12-14 09:42:21,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:42:21,649 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 3449 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:21,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3449 Valid, 3425 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5671 states. [2022-12-14 09:42:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5671 to 5651. [2022-12-14 09:42:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5651 states, 4939 states have (on average 1.643855031382871) internal successors, (8119), 4958 states have internal predecessors, (8119), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-12-14 09:42:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5651 states to 5651 states and 9153 transitions. [2022-12-14 09:42:21,811 INFO L78 Accepts]: Start accepts. Automaton has 5651 states and 9153 transitions. Word has length 109 [2022-12-14 09:42:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:21,811 INFO L495 AbstractCegarLoop]: Abstraction has 5651 states and 9153 transitions. [2022-12-14 09:42:21,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:42:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5651 states and 9153 transitions. [2022-12-14 09:42:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 09:42:21,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:21,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:21,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:42:22,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:22,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:22,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1434546796, now seen corresponding path program 1 times [2022-12-14 09:42:22,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:22,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571550886] [2022-12-14 09:42:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 09:42:22,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:22,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571550886] [2022-12-14 09:42:22,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571550886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:22,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:42:22,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:42:22,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046253153] [2022-12-14 09:42:22,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:22,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:42:22,085 INFO L87 Difference]: Start difference. First operand 5651 states and 9153 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 09:42:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:22,604 INFO L93 Difference]: Finished difference Result 8775 states and 13908 transitions. [2022-12-14 09:42:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-12-14 09:42:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:22,633 INFO L225 Difference]: With dead ends: 8775 [2022-12-14 09:42:22,633 INFO L226 Difference]: Without dead ends: 6707 [2022-12-14 09:42:22,640 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 09:42:22,641 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 91 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6576 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:22,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6576 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:42:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2022-12-14 09:42:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6371. [2022-12-14 09:42:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6371 states, 5627 states have (on average 1.6532788341922873) internal successors, (9303), 5646 states have internal predecessors, (9303), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-12-14 09:42:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6371 states to 6371 states and 10369 transitions. [2022-12-14 09:42:22,821 INFO L78 Accepts]: Start accepts. Automaton has 6371 states and 10369 transitions. Word has length 109 [2022-12-14 09:42:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:22,822 INFO L495 AbstractCegarLoop]: Abstraction has 6371 states and 10369 transitions. [2022-12-14 09:42:22,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 09:42:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6371 states and 10369 transitions. [2022-12-14 09:42:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 09:42:22,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:22,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:22,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:42:22,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash -277253783, now seen corresponding path program 1 times [2022-12-14 09:42:22,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:22,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046271999] [2022-12-14 09:42:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:22,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 09:42:22,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046271999] [2022-12-14 09:42:22,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046271999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:22,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:42:22,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:42:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177616807] [2022-12-14 09:42:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:22,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:42:22,899 INFO L87 Difference]: Start difference. First operand 6371 states and 10369 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:23,386 INFO L93 Difference]: Finished difference Result 15676 states and 24586 transitions. [2022-12-14 09:42:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 09:42:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:23,423 INFO L225 Difference]: With dead ends: 15676 [2022-12-14 09:42:23,423 INFO L226 Difference]: Without dead ends: 10951 [2022-12-14 09:42:23,440 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 09:42:23,441 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3451 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:23,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10951 states. [2022-12-14 09:42:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10951 to 10899. [2022-12-14 09:42:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10899 states, 9451 states have (on average 1.5887207702888584) internal successors, (15015), 9486 states have internal predecessors, (15015), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-12-14 09:42:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10899 states to 10899 states and 17073 transitions. [2022-12-14 09:42:23,815 INFO L78 Accepts]: Start accepts. Automaton has 10899 states and 17073 transitions. Word has length 147 [2022-12-14 09:42:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:23,816 INFO L495 AbstractCegarLoop]: Abstraction has 10899 states and 17073 transitions. [2022-12-14 09:42:23,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 10899 states and 17073 transitions. [2022-12-14 09:42:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 09:42:23,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:23,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:23,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:42:23,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1021361843, now seen corresponding path program 1 times [2022-12-14 09:42:23,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:23,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557864469] [2022-12-14 09:42:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:23,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 09:42:23,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:23,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557864469] [2022-12-14 09:42:23,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557864469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:23,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:42:23,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:42:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098200025] [2022-12-14 09:42:23,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:42:23,929 INFO L87 Difference]: Start difference. First operand 10899 states and 17073 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:24,534 INFO L93 Difference]: Finished difference Result 29116 states and 44698 transitions. [2022-12-14 09:42:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:24,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 09:42:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:24,580 INFO L225 Difference]: With dead ends: 29116 [2022-12-14 09:42:24,580 INFO L226 Difference]: Without dead ends: 19863 [2022-12-14 09:42:24,602 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 09:42:24,602 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3453 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:24,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:42:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19863 states. [2022-12-14 09:42:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19863 to 19763. [2022-12-14 09:42:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19763 states, 16939 states have (on average 1.5419446248302733) internal successors, (26119), 17006 states have internal predecessors, (26119), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-12-14 09:42:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19763 states to 19763 states and 30097 transitions. [2022-12-14 09:42:25,124 INFO L78 Accepts]: Start accepts. Automaton has 19763 states and 30097 transitions. Word has length 147 [2022-12-14 09:42:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:25,124 INFO L495 AbstractCegarLoop]: Abstraction has 19763 states and 30097 transitions. [2022-12-14 09:42:25,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 19763 states and 30097 transitions. [2022-12-14 09:42:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 09:42:25,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:25,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:25,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:42:25,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:25,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1691060202, now seen corresponding path program 1 times [2022-12-14 09:42:25,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:25,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012753779] [2022-12-14 09:42:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:25,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 09:42:25,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012753779] [2022-12-14 09:42:25,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012753779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:25,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:42:25,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:42:25,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076558239] [2022-12-14 09:42:25,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:25,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:42:25,209 INFO L87 Difference]: Start difference. First operand 19763 states and 30097 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:26,472 INFO L93 Difference]: Finished difference Result 55420 states and 83738 transitions. [2022-12-14 09:42:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 09:42:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:26,543 INFO L225 Difference]: With dead ends: 55420 [2022-12-14 09:42:26,543 INFO L226 Difference]: Without dead ends: 37303 [2022-12-14 09:42:26,575 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 09:42:26,576 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3455 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:26,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37303 states. [2022-12-14 09:42:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37303 to 37107. [2022-12-14 09:42:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37107 states, 31595 states have (on average 1.5093210951099858) internal successors, (47687), 31726 states have internal predecessors, (47687), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-12-14 09:42:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37107 states to 37107 states and 55377 transitions. [2022-12-14 09:42:27,542 INFO L78 Accepts]: Start accepts. Automaton has 37107 states and 55377 transitions. Word has length 147 [2022-12-14 09:42:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:27,542 INFO L495 AbstractCegarLoop]: Abstraction has 37107 states and 55377 transitions. [2022-12-14 09:42:27,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 37107 states and 55377 transitions. [2022-12-14 09:42:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 09:42:27,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:27,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:42:27,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1993495800, now seen corresponding path program 1 times [2022-12-14 09:42:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:27,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595944713] [2022-12-14 09:42:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:27,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 09:42:27,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:27,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595944713] [2022-12-14 09:42:27,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595944713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:27,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:42:27,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:42:27,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934276589] [2022-12-14 09:42:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:27,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:27,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:42:27,645 INFO L87 Difference]: Start difference. First operand 37107 states and 55377 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:29,779 INFO L93 Difference]: Finished difference Result 106876 states and 159450 transitions. [2022-12-14 09:42:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 09:42:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:29,936 INFO L225 Difference]: With dead ends: 106876 [2022-12-14 09:42:29,936 INFO L226 Difference]: Without dead ends: 71415 [2022-12-14 09:42:30,000 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 09:42:30,000 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3458 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:30,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3458 Valid, 3442 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71415 states. [2022-12-14 09:42:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71415 to 71027. [2022-12-14 09:42:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71027 states, 60267 states have (on average 1.485771649493089) internal successors, (89543), 60526 states have internal predecessors, (89543), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-12-14 09:42:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71027 states to 71027 states and 104401 transitions. [2022-12-14 09:42:31,948 INFO L78 Accepts]: Start accepts. Automaton has 71027 states and 104401 transitions. Word has length 147 [2022-12-14 09:42:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:31,949 INFO L495 AbstractCegarLoop]: Abstraction has 71027 states and 104401 transitions. [2022-12-14 09:42:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:42:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 71027 states and 104401 transitions. [2022-12-14 09:42:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 09:42:32,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:32,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:32,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:42:32,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1352788567, now seen corresponding path program 1 times [2022-12-14 09:42:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906055681] [2022-12-14 09:42:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 09:42:32,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:32,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906055681] [2022-12-14 09:42:32,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906055681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:32,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:42:32,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:42:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798940918] [2022-12-14 09:42:32,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:32,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:32,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:42:32,304 INFO L87 Difference]: Start difference. First operand 71027 states and 104401 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:42:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:36,162 INFO L93 Difference]: Finished difference Result 184187 states and 274647 transitions. [2022-12-14 09:42:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 09:42:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:36,511 INFO L225 Difference]: With dead ends: 184187 [2022-12-14 09:42:36,511 INFO L226 Difference]: Without dead ends: 114807 [2022-12-14 09:42:36,633 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 09:42:36,633 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 109 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6528 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:36,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6528 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:42:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114807 states. [2022-12-14 09:42:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114807 to 100731. [2022-12-14 09:42:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100731 states, 88431 states have (on average 1.551073718492384) internal successors, (137163), 88691 states have internal predecessors, (137163), 8200 states have call successors, (8200), 4099 states have call predecessors, (8200), 4098 states have return successors, (8198), 7941 states have call predecessors, (8198), 8198 states have call successors, (8198) [2022-12-14 09:42:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100731 states to 100731 states and 153561 transitions. [2022-12-14 09:42:40,015 INFO L78 Accepts]: Start accepts. Automaton has 100731 states and 153561 transitions. Word has length 168 [2022-12-14 09:42:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:40,015 INFO L495 AbstractCegarLoop]: Abstraction has 100731 states and 153561 transitions. [2022-12-14 09:42:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:42:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 100731 states and 153561 transitions. [2022-12-14 09:42:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 09:42:40,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:40,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:40,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 09:42:40,384 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:40,385 INFO L85 PathProgramCache]: Analyzing trace with hash 778931967, now seen corresponding path program 2 times [2022-12-14 09:42:40,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:40,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392670412] [2022-12-14 09:42:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:40,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 09:42:40,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:40,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392670412] [2022-12-14 09:42:40,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392670412] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:42:40,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977016518] [2022-12-14 09:42:40,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:42:40,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:40,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:40,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:42:40,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:42:40,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:42:40,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:42:40,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:42:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:42:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:42:41,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:42:41,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977016518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:41,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:42:41,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:42:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318169531] [2022-12-14 09:42:41,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:41,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:41,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:42:41,038 INFO L87 Difference]: Start difference. First operand 100731 states and 153561 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:42:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:44,650 INFO L93 Difference]: Finished difference Result 151683 states and 233439 transitions. [2022-12-14 09:42:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:44,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 09:42:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:44,930 INFO L225 Difference]: With dead ends: 151683 [2022-12-14 09:42:44,930 INFO L226 Difference]: Without dead ends: 100991 [2022-12-14 09:42:45,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:42:45,033 INFO L413 NwaCegarLoop]: 3392 mSDtfsCounter, 179 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 6622 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:45,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 6622 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:42:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100991 states. [2022-12-14 09:42:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100991 to 99707. [2022-12-14 09:42:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99707 states, 87407 states have (on average 1.5370279268250826) internal successors, (134347), 87667 states have internal predecessors, (134347), 8200 states have call successors, (8200), 4099 states have call predecessors, (8200), 4098 states have return successors, (8198), 7941 states have call predecessors, (8198), 8198 states have call successors, (8198) [2022-12-14 09:42:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99707 states to 99707 states and 150745 transitions. [2022-12-14 09:42:48,460 INFO L78 Accepts]: Start accepts. Automaton has 99707 states and 150745 transitions. Word has length 168 [2022-12-14 09:42:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:48,460 INFO L495 AbstractCegarLoop]: Abstraction has 99707 states and 150745 transitions. [2022-12-14 09:42:48,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:42:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 99707 states and 150745 transitions. [2022-12-14 09:42:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 09:42:48,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:48,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:48,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:42:48,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 09:42:48,797 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1752420926, now seen corresponding path program 1 times [2022-12-14 09:42:48,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:48,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089082739] [2022-12-14 09:42:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:48,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 09:42:49,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:49,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089082739] [2022-12-14 09:42:49,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089082739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:42:49,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664497870] [2022-12-14 09:42:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:49,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:49,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:49,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:42:49,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:42:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:42:49,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:42:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 09:42:49,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:42:49,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664497870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:49,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:42:49,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:42:49,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403576680] [2022-12-14 09:42:49,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:49,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:49,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:49,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:42:49,307 INFO L87 Difference]: Start difference. First operand 99707 states and 150745 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 09:42:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:42:53,279 INFO L93 Difference]: Finished difference Result 190723 states and 290143 transitions. [2022-12-14 09:42:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:42:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 168 [2022-12-14 09:42:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:42:53,592 INFO L225 Difference]: With dead ends: 190723 [2022-12-14 09:42:53,593 INFO L226 Difference]: Without dead ends: 141567 [2022-12-14 09:42:53,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:42:53,661 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 147 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6614 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:42:53,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 6614 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:42:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141567 states. [2022-12-14 09:42:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141567 to 128251. [2022-12-14 09:42:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128251 states, 114415 states have (on average 1.5702399160949176) internal successors, (179659), 114675 states have internal predecessors, (179659), 8968 states have call successors, (8968), 4867 states have call predecessors, (8968), 4866 states have return successors, (8966), 8709 states have call predecessors, (8966), 8966 states have call successors, (8966) [2022-12-14 09:42:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128251 states to 128251 states and 197593 transitions. [2022-12-14 09:42:57,948 INFO L78 Accepts]: Start accepts. Automaton has 128251 states and 197593 transitions. Word has length 168 [2022-12-14 09:42:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:42:57,948 INFO L495 AbstractCegarLoop]: Abstraction has 128251 states and 197593 transitions. [2022-12-14 09:42:57,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 09:42:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 128251 states and 197593 transitions. [2022-12-14 09:42:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 09:42:58,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:42:58,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:42:58,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:42:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 09:42:58,378 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:42:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:42:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2041759479, now seen corresponding path program 2 times [2022-12-14 09:42:58,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:42:58,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706071935] [2022-12-14 09:42:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:42:58,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:42:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:42:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 09:42:58,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:42:58,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706071935] [2022-12-14 09:42:58,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706071935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:42:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833102688] [2022-12-14 09:42:58,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:42:58,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:42:58,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:42:58,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:42:58,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:42:58,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:42:58,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:42:58,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:42:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:42:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 09:42:58,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:42:58,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833102688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:42:58,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:42:58,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:42:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355323120] [2022-12-14 09:42:58,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:42:58,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:42:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:42:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:42:58,780 INFO L87 Difference]: Start difference. First operand 128251 states and 197593 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:43:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:43:02,766 INFO L93 Difference]: Finished difference Result 192771 states and 299103 transitions. [2022-12-14 09:43:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:43:02,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 09:43:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:43:03,053 INFO L225 Difference]: With dead ends: 192771 [2022-12-14 09:43:03,053 INFO L226 Difference]: Without dead ends: 128511 [2022-12-14 09:43:03,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:43:03,157 INFO L413 NwaCegarLoop]: 3386 mSDtfsCounter, 190 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 6615 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:43:03,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 6615 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:43:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128511 states. [2022-12-14 09:43:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128511 to 127611. [2022-12-14 09:43:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127611 states, 113775 states have (on average 1.5610722918039992) internal successors, (177611), 114035 states have internal predecessors, (177611), 8968 states have call successors, (8968), 4867 states have call predecessors, (8968), 4866 states have return successors, (8966), 8709 states have call predecessors, (8966), 8966 states have call successors, (8966) [2022-12-14 09:43:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127611 states to 127611 states and 195545 transitions. [2022-12-14 09:43:07,633 INFO L78 Accepts]: Start accepts. Automaton has 127611 states and 195545 transitions. Word has length 168 [2022-12-14 09:43:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:43:07,633 INFO L495 AbstractCegarLoop]: Abstraction has 127611 states and 195545 transitions. [2022-12-14 09:43:07,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:43:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 127611 states and 195545 transitions. [2022-12-14 09:43:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 09:43:07,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:43:07,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:43:07,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:43:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:43:08,002 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:43:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:43:08,003 INFO L85 PathProgramCache]: Analyzing trace with hash 113754922, now seen corresponding path program 1 times [2022-12-14 09:43:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:43:08,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485091194] [2022-12-14 09:43:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:08,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:43:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 09:43:08,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:43:08,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485091194] [2022-12-14 09:43:08,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485091194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:43:08,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309657591] [2022-12-14 09:43:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:08,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:43:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:43:08,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:43:08,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:43:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:43:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:43:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 09:43:08,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:43:08,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309657591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:43:08,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:43:08,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:43:08,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710583878] [2022-12-14 09:43:08,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:43:08,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:43:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:43:08,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:43:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:43:08,339 INFO L87 Difference]: Start difference. First operand 127611 states and 195545 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:43:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:43:12,862 INFO L93 Difference]: Finished difference Result 209593 states and 316182 transitions. [2022-12-14 09:43:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:43:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 09:43:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:43:13,253 INFO L225 Difference]: With dead ends: 209593 [2022-12-14 09:43:13,253 INFO L226 Difference]: Without dead ends: 146293 [2022-12-14 09:43:13,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:43:13,357 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 3456 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:43:13,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3312 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:43:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146293 states. [2022-12-14 09:43:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146293 to 146293. [2022-12-14 09:43:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146293 states, 130925 states have (on average 1.5149513080007637) internal successors, (198345), 131185 states have internal predecessors, (198345), 9478 states have call successors, (9478), 5889 states have call predecessors, (9478), 5888 states have return successors, (9476), 9219 states have call predecessors, (9476), 9476 states have call successors, (9476) [2022-12-14 09:43:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146293 states to 146293 states and 217299 transitions. [2022-12-14 09:43:18,602 INFO L78 Accepts]: Start accepts. Automaton has 146293 states and 217299 transitions. Word has length 168 [2022-12-14 09:43:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:43:18,602 INFO L495 AbstractCegarLoop]: Abstraction has 146293 states and 217299 transitions. [2022-12-14 09:43:18,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:43:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 146293 states and 217299 transitions. [2022-12-14 09:43:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 09:43:18,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:43:18,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:43:18,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:43:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 09:43:19,054 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:43:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:43:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash 322589947, now seen corresponding path program 1 times [2022-12-14 09:43:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:43:19,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096785924] [2022-12-14 09:43:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:43:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 09:43:19,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:43:19,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096785924] [2022-12-14 09:43:19,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096785924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:43:19,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998548584] [2022-12-14 09:43:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:19,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:43:19,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:43:19,352 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:43:19,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:43:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:43:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:43:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 09:43:19,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:43:19,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998548584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:43:19,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:43:19,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:43:19,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298918740] [2022-12-14 09:43:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:43:19,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:43:19,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:43:19,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:43:19,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:43:19,650 INFO L87 Difference]: Start difference. First operand 146293 states and 217299 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:43:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:43:27,270 INFO L93 Difference]: Finished difference Result 358785 states and 539868 transitions. [2022-12-14 09:43:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:43:27,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 09:43:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:43:27,902 INFO L225 Difference]: With dead ends: 358785 [2022-12-14 09:43:27,903 INFO L226 Difference]: Without dead ends: 214139 [2022-12-14 09:43:28,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:43:28,079 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 98 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 6491 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:43:28,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 6491 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:43:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214139 states. [2022-12-14 09:43:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214139 to 174965. [2022-12-14 09:43:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174965 states, 158061 states have (on average 1.5399181328727516) internal successors, (243401), 158321 states have internal predecessors, (243401), 10246 states have call successors, (10246), 6657 states have call predecessors, (10246), 6656 states have return successors, (10244), 9987 states have call predecessors, (10244), 10244 states have call successors, (10244) [2022-12-14 09:43:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174965 states to 174965 states and 263891 transitions. [2022-12-14 09:43:35,149 INFO L78 Accepts]: Start accepts. Automaton has 174965 states and 263891 transitions. Word has length 168 [2022-12-14 09:43:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:43:35,149 INFO L495 AbstractCegarLoop]: Abstraction has 174965 states and 263891 transitions. [2022-12-14 09:43:35,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:43:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 174965 states and 263891 transitions. [2022-12-14 09:43:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 09:43:35,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:43:35,454 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:43:35,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:43:35,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:43:35,655 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:43:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:43:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash 998573002, now seen corresponding path program 1 times [2022-12-14 09:43:35,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:43:35,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945381942] [2022-12-14 09:43:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:43:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 13 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 09:43:35,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:43:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945381942] [2022-12-14 09:43:35,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945381942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:43:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15108477] [2022-12-14 09:43:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:35,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:43:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:43:35,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:43:35,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:43:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:43:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:43:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:43:36,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:43:36,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15108477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:43:36,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:43:36,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 09:43:36,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691028582] [2022-12-14 09:43:36,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:43:36,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:43:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:43:36,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:43:36,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:43:36,194 INFO L87 Difference]: Start difference. First operand 174965 states and 263891 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 09:43:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:43:47,999 INFO L93 Difference]: Finished difference Result 523135 states and 784471 transitions. [2022-12-14 09:43:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:43:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 169 [2022-12-14 09:43:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:43:49,080 INFO L225 Difference]: With dead ends: 523135 [2022-12-14 09:43:49,080 INFO L226 Difference]: Without dead ends: 349817 [2022-12-14 09:43:49,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:43:49,292 INFO L413 NwaCegarLoop]: 3423 mSDtfsCounter, 3489 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 6989 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:43:49,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 6989 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:43:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349817 states. [2022-12-14 09:44:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349817 to 348781. [2022-12-14 09:44:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348781 states, 314731 states have (on average 1.5119165255408586) internal successors, (475847), 315760 states have internal predecessors, (475847), 20227 states have call successors, (20227), 13310 states have call predecessors, (20227), 13821 states have return successors, (23677), 19711 states have call predecessors, (23677), 20225 states have call successors, (23677) [2022-12-14 09:44:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348781 states to 348781 states and 519751 transitions. [2022-12-14 09:44:04,204 INFO L78 Accepts]: Start accepts. Automaton has 348781 states and 519751 transitions. Word has length 169 [2022-12-14 09:44:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:44:04,205 INFO L495 AbstractCegarLoop]: Abstraction has 348781 states and 519751 transitions. [2022-12-14 09:44:04,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 09:44:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 348781 states and 519751 transitions. [2022-12-14 09:44:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 09:44:04,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:44:04,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:44:04,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 09:44:05,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:44:05,096 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:44:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:44:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash -218613621, now seen corresponding path program 2 times [2022-12-14 09:44:05,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:44:05,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705795721] [2022-12-14 09:44:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:44:05,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:44:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:44:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 13 proven. 54 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 09:44:05,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:44:05,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705795721] [2022-12-14 09:44:05,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705795721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:44:05,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786225314] [2022-12-14 09:44:05,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:44:05,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:44:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:44:05,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:44:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:44:05,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:44:05,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:44:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:44:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:44:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:44:05,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:44:05,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786225314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:44:05,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:44:05,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:44:05,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779284334] [2022-12-14 09:44:05,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:44:05,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:44:05,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:44:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:44:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:44:05,520 INFO L87 Difference]: Start difference. First operand 348781 states and 519751 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:44:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:44:23,661 INFO L93 Difference]: Finished difference Result 696423 states and 1051439 transitions. [2022-12-14 09:44:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:44:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 169 [2022-12-14 09:44:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:44:25,246 INFO L225 Difference]: With dead ends: 696423 [2022-12-14 09:44:25,247 INFO L226 Difference]: Without dead ends: 515433 [2022-12-14 09:44:25,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:44:25,606 INFO L413 NwaCegarLoop]: 3279 mSDtfsCounter, 3443 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3449 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:44:25,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3449 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:44:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515433 states. [2022-12-14 09:44:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515433 to 511841. [2022-12-14 09:44:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511841 states, 461159 states have (on average 1.5120229682170359) internal successors, (697283), 462444 states have internal predecessors, (697283), 30207 states have call successors, (30207), 19962 states have call predecessors, (30207), 20473 states have return successors, (38261), 29435 states have call predecessors, (38261), 30205 states have call successors, (38261) [2022-12-14 09:44:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511841 states to 511841 states and 765751 transitions. [2022-12-14 09:44:47,926 INFO L78 Accepts]: Start accepts. Automaton has 511841 states and 765751 transitions. Word has length 169 [2022-12-14 09:44:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:44:47,926 INFO L495 AbstractCegarLoop]: Abstraction has 511841 states and 765751 transitions. [2022-12-14 09:44:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:44:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 511841 states and 765751 transitions. [2022-12-14 09:44:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 09:44:49,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:44:49,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:44:49,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 09:44:49,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:44:49,221 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:44:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:44:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash -878322767, now seen corresponding path program 3 times [2022-12-14 09:44:49,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:44:49,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849760145] [2022-12-14 09:44:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:44:49,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:44:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:44:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 13 proven. 54 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 09:44:49,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:44:49,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849760145] [2022-12-14 09:44:49,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849760145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:44:49,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317856847] [2022-12-14 09:44:49,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:44:49,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:44:49,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:44:49,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:44:49,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:44:49,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:44:49,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:44:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:44:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:44:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 09:44:49,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:44:49,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317856847] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:44:49,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:44:49,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:44:49,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982561278] [2022-12-14 09:44:49,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:44:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:44:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:44:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:44:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:44:49,623 INFO L87 Difference]: Start difference. First operand 511841 states and 765751 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:45:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:10,359 INFO L93 Difference]: Finished difference Result 894653 states and 1329796 transitions. [2022-12-14 09:45:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:45:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 169 [2022-12-14 09:45:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:11,845 INFO L225 Difference]: With dead ends: 894653 [2022-12-14 09:45:11,845 INFO L226 Difference]: Without dead ends: 547531 [2022-12-14 09:45:12,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:45:12,330 INFO L413 NwaCegarLoop]: 3266 mSDtfsCounter, 3406 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:12,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3406 Valid, 3322 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:45:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547531 states. [2022-12-14 09:45:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547531 to 546891. [2022-12-14 09:45:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546891 states, 494049 states have (on average 1.4880406599345408) internal successors, (735165), 494566 states have internal predecessors, (735165), 30965 states have call successors, (30965), 22256 states have call predecessors, (30965), 21875 states have return successors, (36845), 30069 states have call predecessors, (36845), 30963 states have call successors, (36845) [2022-12-14 09:45:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546891 states to 546891 states and 802975 transitions. [2022-12-14 09:45:35,576 INFO L78 Accepts]: Start accepts. Automaton has 546891 states and 802975 transitions. Word has length 169 [2022-12-14 09:45:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:35,577 INFO L495 AbstractCegarLoop]: Abstraction has 546891 states and 802975 transitions. [2022-12-14 09:45:35,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:45:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 546891 states and 802975 transitions. [2022-12-14 09:45:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 09:45:36,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:36,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:36,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:45:36,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:36,835 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:36,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1835251150, now seen corresponding path program 1 times [2022-12-14 09:45:36,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:36,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020082869] [2022-12-14 09:45:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:36,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 09:45:37,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:37,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020082869] [2022-12-14 09:45:37,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020082869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:45:37,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728105432] [2022-12-14 09:45:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:37,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:37,021 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:37,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:45:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:37,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:45:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 09:45:37,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:45:37,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728105432] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:45:37,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:45:37,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:45:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397016442] [2022-12-14 09:45:37,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:45:37,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:45:37,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:45:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:45:37,221 INFO L87 Difference]: Start difference. First operand 546891 states and 802975 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:45:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:52,748 INFO L93 Difference]: Finished difference Result 730955 states and 1079703 transitions. [2022-12-14 09:45:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:45:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 169 [2022-12-14 09:45:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:53,791 INFO L225 Difference]: With dead ends: 730955 [2022-12-14 09:45:53,791 INFO L226 Difference]: Without dead ends: 366435 [2022-12-14 09:45:54,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:45:54,237 INFO L413 NwaCegarLoop]: 3387 mSDtfsCounter, 187 mSDsluCounter, 3228 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 6615 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:54,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 6615 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:45:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366435 states. [2022-12-14 09:46:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366435 to 363615. [2022-12-14 09:46:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363615 states, 328423 states have (on average 1.4823900883921042) internal successors, (486851), 328684 states have internal predecessors, (486851), 20733 states have call successors, (20733), 14840 states have call predecessors, (20733), 14457 states have return successors, (21755), 20091 states have call predecessors, (21755), 20731 states have call successors, (21755) [2022-12-14 09:46:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363615 states to 363615 states and 529339 transitions. [2022-12-14 09:46:09,750 INFO L78 Accepts]: Start accepts. Automaton has 363615 states and 529339 transitions. Word has length 169 [2022-12-14 09:46:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:46:09,751 INFO L495 AbstractCegarLoop]: Abstraction has 363615 states and 529339 transitions. [2022-12-14 09:46:09,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:46:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 363615 states and 529339 transitions. [2022-12-14 09:46:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 09:46:10,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:46:10,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:46:10,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:46:10,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:46:10,685 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:46:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:46:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2113001837, now seen corresponding path program 1 times [2022-12-14 09:46:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:46:10,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868719238] [2022-12-14 09:46:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:46:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:46:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 09:46:10,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:46:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868719238] [2022-12-14 09:46:10,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868719238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:46:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636512397] [2022-12-14 09:46:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:10,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:46:10,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:46:10,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:46:10,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:46:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:46:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:46:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:46:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:46:11,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:46:11,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636512397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:46:11,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:46:11,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 09:46:11,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305020888] [2022-12-14 09:46:11,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:46:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:46:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:46:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:46:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:46:11,077 INFO L87 Difference]: Start difference. First operand 363615 states and 529339 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:46:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:46:35,239 INFO L93 Difference]: Finished difference Result 897523 states and 1304393 transitions. [2022-12-14 09:46:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:46:35,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 170 [2022-12-14 09:46:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:46:36,826 INFO L225 Difference]: With dead ends: 897523 [2022-12-14 09:46:36,826 INFO L226 Difference]: Without dead ends: 535555 [2022-12-14 09:46:37,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:46:37,220 INFO L413 NwaCegarLoop]: 3233 mSDtfsCounter, 3841 mSDsluCounter, 6450 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3858 SdHoareTripleChecker+Valid, 9683 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:46:37,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3858 Valid, 9683 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:46:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535555 states. [2022-12-14 09:47:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535555 to 535551. [2022-12-14 09:47:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535551 states, 483037 states have (on average 1.4677654092750658) internal successors, (708985), 483426 states have internal predecessors, (708985), 30833 states have call successors, (30833), 22252 states have call predecessors, (30833), 21679 states have return successors, (32367), 29873 states have call predecessors, (32367), 30831 states have call successors, (32367) [2022-12-14 09:47:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535551 states to 535551 states and 772185 transitions. [2022-12-14 09:47:03,461 INFO L78 Accepts]: Start accepts. Automaton has 535551 states and 772185 transitions. Word has length 170 [2022-12-14 09:47:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:03,461 INFO L495 AbstractCegarLoop]: Abstraction has 535551 states and 772185 transitions. [2022-12-14 09:47:03,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:47:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 535551 states and 772185 transitions. [2022-12-14 09:47:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 09:47:04,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:04,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:04,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:47:04,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:04,434 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:47:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash -634317467, now seen corresponding path program 1 times [2022-12-14 09:47:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:04,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450622439] [2022-12-14 09:47:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:04,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 09:47:04,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:04,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450622439] [2022-12-14 09:47:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450622439] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022205174] [2022-12-14 09:47:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:04,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:04,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:04,769 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:04,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:47:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:47:04,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:47:05,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:47:05,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022205174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:05,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:47:05,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 09:47:05,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933064508] [2022-12-14 09:47:05,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:05,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:47:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:47:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:47:05,001 INFO L87 Difference]: Start difference. First operand 535551 states and 772185 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:47:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:44,893 INFO L93 Difference]: Finished difference Result 1320531 states and 1899875 transitions. [2022-12-14 09:47:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:47:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 172 [2022-12-14 09:47:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:47,276 INFO L225 Difference]: With dead ends: 1320531 [2022-12-14 09:47:47,277 INFO L226 Difference]: Without dead ends: 786627 [2022-12-14 09:47:48,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:47:48,054 INFO L413 NwaCegarLoop]: 3233 mSDtfsCounter, 3836 mSDsluCounter, 6445 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 9678 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:48,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3853 Valid, 9678 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:47:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786627 states. [2022-12-14 09:48:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786627 to 786623. [2022-12-14 09:48:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786623 states, 708265 states have (on average 1.451079751223059) internal successors, (1027749), 708846 states have internal predecessors, (1027749), 45849 states have call successors, (45849), 33364 states have call predecessors, (45849), 32507 states have return successors, (48151), 44413 states have call predecessors, (48151), 45847 states have call successors, (48151) [2022-12-14 09:48:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786623 states to 786623 states and 1121749 transitions. [2022-12-14 09:48:31,766 INFO L78 Accepts]: Start accepts. Automaton has 786623 states and 1121749 transitions. Word has length 172 [2022-12-14 09:48:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:48:31,767 INFO L495 AbstractCegarLoop]: Abstraction has 786623 states and 1121749 transitions. [2022-12-14 09:48:31,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:48:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 786623 states and 1121749 transitions. [2022-12-14 09:48:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 09:48:33,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:48:33,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:48:33,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 09:48:33,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 09:48:33,309 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:48:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:48:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -858257389, now seen corresponding path program 1 times [2022-12-14 09:48:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:48:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144140363] [2022-12-14 09:48:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:48:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:48:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:48:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 09:48:33,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:48:33,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144140363] [2022-12-14 09:48:33,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144140363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:48:33,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861813827] [2022-12-14 09:48:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:48:33,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:48:33,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:48:33,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:48:33,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfdce698-d894-4298-b3d3-813e59ebda99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:48:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:48:33,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:48:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:48:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 09:48:33,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:48:33,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861813827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:48:33,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:48:33,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 09:48:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736448791] [2022-12-14 09:48:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:48:33,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:48:33,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:48:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:48:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:48:33,688 INFO L87 Difference]: Start difference. First operand 786623 states and 1121749 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 09:49:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:49:26,076 INFO L93 Difference]: Finished difference Result 1655699 states and 2315583 transitions. [2022-12-14 09:49:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:49:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 09:49:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:49:28,862 INFO L225 Difference]: With dead ends: 1655699 [2022-12-14 09:49:28,863 INFO L226 Difference]: Without dead ends: 870723 [2022-12-14 09:49:30,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:49:30,029 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3848 mSDsluCounter, 6468 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3865 SdHoareTripleChecker+Valid, 9707 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:49:30,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3865 Valid, 9707 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:49:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870723 states.