./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur --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 b4c883892095e0f755900dfa24a6bc793b8370cf6ff9d1a6368a9f789f01f5b0 --- 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-38b53e6 [2022-11-25 23:57:09,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:57:09,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:57:09,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:57:09,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:57:09,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:57:09,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:57:09,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:57:09,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:57:09,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:57:09,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:57:09,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:57:09,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:57:09,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:57:09,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:57:09,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:57:09,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:57:09,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:57:09,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:57:09,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:57:09,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:57:09,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:57:09,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:57:09,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:57:09,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:57:09,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:57:09,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:57:09,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:57:09,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:57:09,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:57:09,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:57:09,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:57:09,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:57:09,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:57:09,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:57:09,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:57:09,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:57:09,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:57:09,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:57:09,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:57:09,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:57:09,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:57:09,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:57:09,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:57:09,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:57:09,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:57:09,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:57:09,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:57:09,846 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:57:09,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:57:09,846 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:57:09,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:57:09,846 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:57:09,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:57:09,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:57:09,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:57:09,847 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:57:09,847 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:57:09,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:57:09,848 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:57:09,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:57:09,849 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:57:09,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:57:09,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:57:09,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:57:09,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:57:09,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:57:09,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:57:09,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:57:09,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:57:09,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:57:09,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:57:09,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:57:09,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:57:09,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:57:09,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:57:09,852 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:57:09,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:57:09,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:57:09,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:57:09,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:57:09,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:57:09,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:57:09,853 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_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4c883892095e0f755900dfa24a6bc793b8370cf6ff9d1a6368a9f789f01f5b0 [2022-11-25 23:57:10,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:57:10,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:57:10,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:57:10,130 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:57:10,130 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:57:10,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c [2022-11-25 23:57:13,304 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:57:14,021 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:57:14,022 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c [2022-11-25 23:57:14,074 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/data/c75a0e363/19d4534762554f55a19f3760a0b2dca1/FLAG4d7673949 [2022-11-25 23:57:14,092 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/data/c75a0e363/19d4534762554f55a19f3760a0b2dca1 [2022-11-25 23:57:14,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:57:14,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:57:14,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:57:14,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:57:14,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:57:14,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:57:14" (1/1) ... [2022-11-25 23:57:14,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a01e936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:14, skipping insertion in model container [2022-11-25 23:57:14,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:57:14" (1/1) ... [2022-11-25 23:57:14,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:57:14,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:57:16,759 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_4278a0d7-a534-4c58-a69f-907d1d415fdf/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c[380323,380336] [2022-11-25 23:57:16,789 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_4278a0d7-a534-4c58-a69f-907d1d415fdf/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c[383339,383352] [2022-11-25 23:57:17,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:57:17,050 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:57:18,338 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_4278a0d7-a534-4c58-a69f-907d1d415fdf/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c[380323,380336] [2022-11-25 23:57:18,343 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_4278a0d7-a534-4c58-a69f-907d1d415fdf/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-1.c[383339,383352] [2022-11-25 23:57:18,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:57:18,441 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:57:18,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18 WrapperNode [2022-11-25 23:57:18,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:57:18,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:57:18,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:57:18,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:57:18,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:18,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,025 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2022-11-25 23:57:19,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:57:19,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:57:19,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:57:19,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:57:19,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,433 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:57:19,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:57:19,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:57:19,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:57:19,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (1/1) ... [2022-11-25 23:57:19,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:57:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:19,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:57:19,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:57:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:57:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 23:57:19,730 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 23:57:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 23:57:19,731 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 23:57:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 23:57:19,731 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 23:57:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 23:57:19,731 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 23:57:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 23:57:19,732 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 23:57:19,732 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 23:57:19,732 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 23:57:19,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:57:19,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:57:19,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:57:19,953 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:57:19,955 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:57:28,795 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:57:30,834 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:57:30,835 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 23:57:30,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:57:30 BoogieIcfgContainer [2022-11-25 23:57:30,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:57:30,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:57:30,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:57:30,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:57:30,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:57:14" (1/3) ... [2022-11-25 23:57:30,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77cebf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:57:30, skipping insertion in model container [2022-11-25 23:57:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:57:18" (2/3) ... [2022-11-25 23:57:30,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77cebf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:57:30, skipping insertion in model container [2022-11-25 23:57:30,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:57:30" (3/3) ... [2022-11-25 23:57:30,851 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.07.cil-1.c [2022-11-25 23:57:30,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:57:30,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:57:30,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:57:30,981 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;@7dd5309b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:57:30,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:57:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 23:57:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 23:57:31,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:31,008 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] [2022-11-25 23:57:31,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1443581668, now seen corresponding path program 1 times [2022-11-25 23:57:31,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247811402] [2022-11-25 23:57:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:31,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:31,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247811402] [2022-11-25 23:57:31,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247811402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:31,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:31,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:57:31,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838269525] [2022-11-25 23:57:31,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:31,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:57:31,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:31,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:57:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:57:31,591 INFO L87 Difference]: Start difference. First operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:57:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:32,634 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2022-11-25 23:57:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:57:32,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-11-25 23:57:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:32,661 INFO L225 Difference]: With dead ends: 3668 [2022-11-25 23:57:32,661 INFO L226 Difference]: Without dead ends: 1891 [2022-11-25 23:57:32,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:57:32,676 INFO L413 NwaCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:32,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3614 Valid, 6644 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:57:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-11-25 23:57:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2022-11-25 23:57:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1838 states have (on average 1.9368879216539716) internal successors, (3560), 1841 states have internal predecessors, (3560), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-25 23:57:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2022-11-25 23:57:32,830 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2022-11-25 23:57:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:32,830 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2022-11-25 23:57:32,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:57:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2022-11-25 23:57:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:57:32,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:32,846 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:32,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:57:32,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 867428978, now seen corresponding path program 1 times [2022-11-25 23:57:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956794422] [2022-11-25 23:57:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:57:33,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:33,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956794422] [2022-11-25 23:57:33,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956794422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:33,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511550352] [2022-11-25 23:57:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:33,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:33,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:33,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:33,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:57:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:57:33,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 23:57:33,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:57:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511550352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:33,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:57:33,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:57:33,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902052847] [2022-11-25 23:57:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:33,498 INFO L87 Difference]: Start difference. First operand 1890 states and 3636 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:34,007 INFO L93 Difference]: Finished difference Result 2371 states and 4365 transitions. [2022-11-25 23:57:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-25 23:57:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:34,019 INFO L225 Difference]: With dead ends: 2371 [2022-11-25 23:57:34,020 INFO L226 Difference]: Without dead ends: 2127 [2022-11-25 23:57:34,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:34,023 INFO L413 NwaCegarLoop]: 3258 mSDtfsCounter, 3438 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:34,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3438 Valid, 3408 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:57:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-11-25 23:57:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2123. [2022-11-25 23:57:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2027 states have (on average 1.892945239269857) internal successors, (3837), 2031 states have internal predecessors, (3837), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-25 23:57:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3977 transitions. [2022-11-25 23:57:34,091 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3977 transitions. Word has length 101 [2022-11-25 23:57:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:34,092 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3977 transitions. [2022-11-25 23:57:34,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3977 transitions. [2022-11-25 23:57:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:57:34,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:34,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:34,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:34,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:34,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:34,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1742991504, now seen corresponding path program 1 times [2022-11-25 23:57:34,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:34,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305348574] [2022-11-25 23:57:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:34,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:57:34,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:34,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305348574] [2022-11-25 23:57:34,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305348574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:34,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948332150] [2022-11-25 23:57:34,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:34,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:34,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:34,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:57:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:57:34,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:57:34,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:57:34,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948332150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:34,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:57:34,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:57:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352376584] [2022-11-25 23:57:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:34,820 INFO L87 Difference]: Start difference. First operand 2123 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:35,485 INFO L93 Difference]: Finished difference Result 3064 states and 5396 transitions. [2022-11-25 23:57:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-25 23:57:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:35,498 INFO L225 Difference]: With dead ends: 3064 [2022-11-25 23:57:35,498 INFO L226 Difference]: Without dead ends: 2587 [2022-11-25 23:57:35,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:35,502 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3435 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:35,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:57:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-11-25 23:57:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2581. [2022-11-25 23:57:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2399 states have (on average 1.8253438932888704) internal successors, (4379), 2405 states have internal predecessors, (4379), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-25 23:57:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4643 transitions. [2022-11-25 23:57:35,624 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4643 transitions. Word has length 101 [2022-11-25 23:57:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:35,626 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 4643 transitions. [2022-11-25 23:57:35,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4643 transitions. [2022-11-25 23:57:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:57:35,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:35,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:35,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:35,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:35,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1239925966, now seen corresponding path program 1 times [2022-11-25 23:57:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:35,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266255880] [2022-11-25 23:57:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:35,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:57:36,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266255880] [2022-11-25 23:57:36,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266255880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345371571] [2022-11-25 23:57:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:36,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:36,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:36,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:57:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:57:36,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:57:36,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:57:36,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345371571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:36,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:57:36,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:57:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233979050] [2022-11-25 23:57:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:36,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:36,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:36,292 INFO L87 Difference]: Start difference. First operand 2581 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:36,876 INFO L93 Difference]: Finished difference Result 4426 states and 7408 transitions. [2022-11-25 23:57:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-25 23:57:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:36,899 INFO L225 Difference]: With dead ends: 4426 [2022-11-25 23:57:36,899 INFO L226 Difference]: Without dead ends: 3491 [2022-11-25 23:57:36,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:36,906 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:36,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:57:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-11-25 23:57:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3481. [2022-11-25 23:57:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3131 states have (on average 1.7371446822101566) internal successors, (5439), 3141 states have internal predecessors, (5439), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-11-25 23:57:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5943 transitions. [2022-11-25 23:57:37,134 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5943 transitions. Word has length 101 [2022-11-25 23:57:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:37,135 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5943 transitions. [2022-11-25 23:57:37,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5943 transitions. [2022-11-25 23:57:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:57:37,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:37,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:37,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:37,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-25 23:57:37,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:37,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1619583092, now seen corresponding path program 1 times [2022-11-25 23:57:37,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:37,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794831894] [2022-11-25 23:57:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:57:37,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:37,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794831894] [2022-11-25 23:57:37,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794831894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:37,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513612784] [2022-11-25 23:57:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:37,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:37,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:37,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:37,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:57:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:57:37,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:57:37,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:57:37,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513612784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:37,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:57:37,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:57:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20011400] [2022-11-25 23:57:37,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:37,824 INFO L87 Difference]: Start difference. First operand 3481 states and 5943 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:38,486 INFO L93 Difference]: Finished difference Result 7102 states and 11332 transitions. [2022-11-25 23:57:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-25 23:57:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:38,516 INFO L225 Difference]: With dead ends: 7102 [2022-11-25 23:57:38,517 INFO L226 Difference]: Without dead ends: 5267 [2022-11-25 23:57:38,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:38,529 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3423 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:38,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:57:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2022-11-25 23:57:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5249. [2022-11-25 23:57:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 4571 states have (on average 1.643185298621746) internal successors, (7511), 4589 states have internal predecessors, (7511), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-25 23:57:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 8479 transitions. [2022-11-25 23:57:38,823 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 8479 transitions. Word has length 101 [2022-11-25 23:57:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:38,823 INFO L495 AbstractCegarLoop]: Abstraction has 5249 states and 8479 transitions. [2022-11-25 23:57:38,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:57:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 8479 transitions. [2022-11-25 23:57:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:57:38,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:38,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:38,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:39,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:39,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1084694326, now seen corresponding path program 1 times [2022-11-25 23:57:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441645280] [2022-11-25 23:57:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:39,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 23:57:39,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:39,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441645280] [2022-11-25 23:57:39,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441645280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:39,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:39,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:57:39,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756184052] [2022-11-25 23:57:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:39,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:39,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:39,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:39,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:39,279 INFO L87 Difference]: Start difference. First operand 5249 states and 8479 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:57:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:39,968 INFO L93 Difference]: Finished difference Result 8051 states and 12672 transitions. [2022-11-25 23:57:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:39,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-25 23:57:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:40,007 INFO L225 Difference]: With dead ends: 8051 [2022-11-25 23:57:40,007 INFO L226 Difference]: Without dead ends: 6209 [2022-11-25 23:57:40,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:40,016 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 82 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:40,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6522 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:57:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2022-11-25 23:57:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5889. [2022-11-25 23:57:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.6510909441977215) internal successors, (8551), 5197 states have internal predecessors, (8551), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-11-25 23:57:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9551 transitions. [2022-11-25 23:57:40,303 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9551 transitions. Word has length 101 [2022-11-25 23:57:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:40,304 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9551 transitions. [2022-11-25 23:57:40,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:57:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9551 transitions. [2022-11-25 23:57:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 23:57:40,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:40,317 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:40,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:57:40,318 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1941559105, now seen corresponding path program 1 times [2022-11-25 23:57:40,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:40,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556584852] [2022-11-25 23:57:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:40,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 23:57:40,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:40,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556584852] [2022-11-25 23:57:40,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556584852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:40,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:40,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:57:40,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279344031] [2022-11-25 23:57:40,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:40,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:40,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:40,418 INFO L87 Difference]: Start difference. First operand 5889 states and 9551 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:57:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:41,206 INFO L93 Difference]: Finished difference Result 14230 states and 22100 transitions. [2022-11-25 23:57:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-25 23:57:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:41,252 INFO L225 Difference]: With dead ends: 14230 [2022-11-25 23:57:41,253 INFO L226 Difference]: Without dead ends: 9987 [2022-11-25 23:57:41,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:41,269 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3427 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:41,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:57:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2022-11-25 23:57:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9937. [2022-11-25 23:57:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9937 states, 8555 states have (on average 1.5793103448275863) internal successors, (13511), 8589 states have internal predecessors, (13511), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-11-25 23:57:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 15439 transitions. [2022-11-25 23:57:41,916 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 15439 transitions. Word has length 136 [2022-11-25 23:57:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:41,917 INFO L495 AbstractCegarLoop]: Abstraction has 9937 states and 15439 transitions. [2022-11-25 23:57:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:57:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 15439 transitions. [2022-11-25 23:57:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 23:57:41,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:41,941 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:41,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:57:41,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash 324575620, now seen corresponding path program 1 times [2022-11-25 23:57:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:41,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537039946] [2022-11-25 23:57:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:41,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 23:57:42,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:42,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537039946] [2022-11-25 23:57:42,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537039946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:42,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:42,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:57:42,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159325669] [2022-11-25 23:57:42,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:42,036 INFO L87 Difference]: Start difference. First operand 9937 states and 15439 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:57:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:43,225 INFO L93 Difference]: Finished difference Result 26230 states and 39732 transitions. [2022-11-25 23:57:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-25 23:57:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:43,298 INFO L225 Difference]: With dead ends: 26230 [2022-11-25 23:57:43,298 INFO L226 Difference]: Without dead ends: 17939 [2022-11-25 23:57:43,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:43,325 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:43,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:57:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-11-25 23:57:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 17841. [2022-11-25 23:57:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17841 states, 15147 states have (on average 1.5257806826434277) internal successors, (23111), 15213 states have internal predecessors, (23111), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-11-25 23:57:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 26831 transitions. [2022-11-25 23:57:44,213 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 26831 transitions. Word has length 136 [2022-11-25 23:57:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:44,215 INFO L495 AbstractCegarLoop]: Abstraction has 17841 states and 26831 transitions. [2022-11-25 23:57:44,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:57:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 26831 transitions. [2022-11-25 23:57:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 23:57:44,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:44,263 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:44,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:57:44,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1873303792, now seen corresponding path program 1 times [2022-11-25 23:57:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:44,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55863719] [2022-11-25 23:57:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 23:57:44,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:44,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55863719] [2022-11-25 23:57:44,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55863719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:44,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:44,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:57:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885136298] [2022-11-25 23:57:44,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:44,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:44,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:44,382 INFO L87 Difference]: Start difference. First operand 17841 states and 26831 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:57:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:46,337 INFO L93 Difference]: Finished difference Result 49654 states and 73812 transitions. [2022-11-25 23:57:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-25 23:57:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:46,489 INFO L225 Difference]: With dead ends: 49654 [2022-11-25 23:57:46,490 INFO L226 Difference]: Without dead ends: 33459 [2022-11-25 23:57:46,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:46,551 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3432 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:46,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:57:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33459 states. [2022-11-25 23:57:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33459 to 33265. [2022-11-25 23:57:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 28011 states have (on average 1.4876655599585877) internal successors, (41671), 28141 states have internal predecessors, (41671), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-25 23:57:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 48847 transitions. [2022-11-25 23:57:48,489 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 48847 transitions. Word has length 136 [2022-11-25 23:57:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:48,490 INFO L495 AbstractCegarLoop]: Abstraction has 33265 states and 48847 transitions. [2022-11-25 23:57:48,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:57:48,490 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 48847 transitions. [2022-11-25 23:57:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 23:57:48,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:48,595 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:48,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:57:48,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1283491000, now seen corresponding path program 1 times [2022-11-25 23:57:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074114365] [2022-11-25 23:57:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-25 23:57:48,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:48,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074114365] [2022-11-25 23:57:48,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074114365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:48,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:57:48,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:57:48,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155799409] [2022-11-25 23:57:48,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:48,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:48,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:48,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:48,705 INFO L87 Difference]: Start difference. First operand 33265 states and 48847 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 23:57:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:51,969 INFO L93 Difference]: Finished difference Result 84725 states and 125265 transitions. [2022-11-25 23:57:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:51,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-25 23:57:51,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:52,226 INFO L225 Difference]: With dead ends: 84725 [2022-11-25 23:57:52,227 INFO L226 Difference]: Without dead ends: 53107 [2022-11-25 23:57:52,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:57:52,301 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 92 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6475 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:52,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6475 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:57:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53107 states. [2022-11-25 23:57:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53107 to 46585. [2022-11-25 23:57:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 40559 states have (on average 1.5482383687960748) internal successors, (62795), 40690 states have internal predecessors, (62795), 3974 states have call successors, (3974), 2050 states have call predecessors, (3974), 2050 states have return successors, (3974), 3845 states have call predecessors, (3974), 3974 states have call successors, (3974) [2022-11-25 23:57:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 70743 transitions. [2022-11-25 23:57:55,504 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 70743 transitions. Word has length 156 [2022-11-25 23:57:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:55,505 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 70743 transitions. [2022-11-25 23:57:55,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 23:57:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 70743 transitions. [2022-11-25 23:57:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 23:57:55,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:55,655 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:55,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:57:55,656 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:55,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1961119322, now seen corresponding path program 2 times [2022-11-25 23:57:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:55,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851986276] [2022-11-25 23:57:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:55,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-25 23:57:55,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851986276] [2022-11-25 23:57:55,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851986276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559181459] [2022-11-25 23:57:55,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:57:55,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:55,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:55,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:55,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:57:56,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:57:56,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:57:56,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:57:56,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:57:56,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559181459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:57:56,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:57:56,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 23:57:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606753392] [2022-11-25 23:57:56,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:57:56,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:57:56,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:57:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:56,121 INFO L87 Difference]: Start difference. First operand 46585 states and 70743 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 23:57:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:59,491 INFO L93 Difference]: Finished difference Result 87933 states and 133849 transitions. [2022-11-25 23:57:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:57:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-25 23:57:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:59,706 INFO L225 Difference]: With dead ends: 87933 [2022-11-25 23:57:59,706 INFO L226 Difference]: Without dead ends: 65083 [2022-11-25 23:57:59,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:57:59,754 INFO L413 NwaCegarLoop]: 3334 mSDtfsCounter, 125 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:59,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6558 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:57:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2022-11-25 23:58:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 59129. [2022-11-25 23:58:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59129 states, 52335 states have (on average 1.5740708894621191) internal successors, (82379), 52466 states have internal predecessors, (82379), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-11-25 23:58:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59129 states to 59129 states and 91095 transitions. [2022-11-25 23:58:03,143 INFO L78 Accepts]: Start accepts. Automaton has 59129 states and 91095 transitions. Word has length 156 [2022-11-25 23:58:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:03,143 INFO L495 AbstractCegarLoop]: Abstraction has 59129 states and 91095 transitions. [2022-11-25 23:58:03,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 23:58:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 59129 states and 91095 transitions. [2022-11-25 23:58:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 23:58:03,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:03,307 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:03,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:03,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:03,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:58:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1622594991, now seen corresponding path program 3 times [2022-11-25 23:58:03,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:03,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470772344] [2022-11-25 23:58:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:03,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-25 23:58:03,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470772344] [2022-11-25 23:58:03,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470772344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:03,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978446542] [2022-11-25 23:58:03,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:58:03,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:03,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:03,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:58:04,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:58:04,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:58:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:58:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:58:04,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:58:04,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978446542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:04,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:58:04,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:58:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34020784] [2022-11-25 23:58:04,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:04,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:58:04,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:58:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:58:04,219 INFO L87 Difference]: Start difference. First operand 59129 states and 91095 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 23:58:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:07,547 INFO L93 Difference]: Finished difference Result 88477 states and 137113 transitions. [2022-11-25 23:58:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:58:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-25 23:58:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:07,780 INFO L225 Difference]: With dead ends: 88477 [2022-11-25 23:58:07,781 INFO L226 Difference]: Without dead ends: 59259 [2022-11-25 23:58:07,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:58:07,860 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 166 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 6559 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:07,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 6559 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:58:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2022-11-25 23:58:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 58809. [2022-11-25 23:58:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58809 states, 52015 states have (on average 1.564068057291166) internal successors, (81355), 52146 states have internal predecessors, (81355), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-11-25 23:58:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58809 states to 58809 states and 90071 transitions. [2022-11-25 23:58:10,631 INFO L78 Accepts]: Start accepts. Automaton has 58809 states and 90071 transitions. Word has length 156 [2022-11-25 23:58:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:10,632 INFO L495 AbstractCegarLoop]: Abstraction has 58809 states and 90071 transitions. [2022-11-25 23:58:10,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 23:58:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 58809 states and 90071 transitions. [2022-11-25 23:58:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 23:58:10,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:10,781 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:58:10,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:10,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:10,988 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:58:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2145915662, now seen corresponding path program 1 times [2022-11-25 23:58:10,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:58:10,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108944215] [2022-11-25 23:58:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:10,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:58:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-25 23:58:11,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:58:11,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108944215] [2022-11-25 23:58:11,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108944215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:11,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784506082] [2022-11-25 23:58:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:11,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:11,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:11,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4278a0d7-a534-4c58-a69f-907d1d415fdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:58:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:11,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:58:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:58:11,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:58:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784506082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:58:11,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:58:11,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:58:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147384314] [2022-11-25 23:58:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:58:11,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:58:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:58:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:58:11,954 INFO L87 Difference]: Start difference. First operand 58809 states and 90071 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 23:58:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:14,414 INFO L93 Difference]: Finished difference Result 95989 states and 144626 transitions. [2022-11-25 23:58:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:58:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-25 23:58:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:14,608 INFO L225 Difference]: With dead ends: 95989 [2022-11-25 23:58:14,609 INFO L226 Difference]: Without dead ends: 67251 [2022-11-25 23:58:14,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:58:14,672 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3432 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:14,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3283 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:58:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67251 states.