./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba --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 315c7f7d4f861da6991110ab8f251d6e6bbcbe86dfcb4a71343434e33094f4a7 --- 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-b5237d8 [2022-11-22 01:50:04,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:50:04,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:50:04,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:50:04,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:50:04,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:50:04,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:50:04,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:50:04,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:50:04,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:50:04,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:50:04,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:50:04,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:50:04,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:50:04,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:50:04,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:50:04,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:50:04,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:50:04,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:50:04,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:50:04,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:50:04,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:50:04,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:50:04,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:50:04,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:50:04,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:50:04,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:50:04,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:50:04,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:50:04,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:50:04,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:50:04,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:50:04,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:50:04,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:50:04,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:50:04,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:50:04,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:50:04,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:50:04,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:50:04,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:50:04,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:50:04,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:50:04,167 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:50:04,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:50:04,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:50:04,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:50:04,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:50:04,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:50:04,170 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:50:04,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:50:04,170 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:50:04,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:50:04,171 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:50:04,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:50:04,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:50:04,171 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:50:04,172 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:50:04,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:50:04,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:50:04,172 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:50:04,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:50:04,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:50:04,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:50:04,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:50:04,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:50:04,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:50:04,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:50:04,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:50:04,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:50:04,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:50:04,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:50:04,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:50:04,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:50:04,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:50:04,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:50:04,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:50:04,176 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:50:04,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:50:04,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:50:04,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:50:04,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:50:04,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:50:04,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:50:04,178 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_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 315c7f7d4f861da6991110ab8f251d6e6bbcbe86dfcb4a71343434e33094f4a7 [2022-11-22 01:50:04,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:50:04,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:50:04,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:50:04,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:50:04,528 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:50:04,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2022-11-22 01:50:07,636 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:50:08,003 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:50:08,004 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2022-11-22 01:50:08,017 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/data/7d4f929d4/c4fa8b73066642eb93a1bd833058fc19/FLAGab37f7ce7 [2022-11-22 01:50:08,033 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/data/7d4f929d4/c4fa8b73066642eb93a1bd833058fc19 [2022-11-22 01:50:08,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:50:08,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:50:08,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:50:08,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:50:08,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:50:08,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ced6d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08, skipping insertion in model container [2022-11-22 01:50:08,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:50:08,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:50:08,438 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_ece240b0-5c6f-49af-afa3-b7910afd3b38/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2022-11-22 01:50:08,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:50:08,461 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:50:08,586 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_ece240b0-5c6f-49af-afa3-b7910afd3b38/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2022-11-22 01:50:08,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:50:08,604 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:50:08,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08 WrapperNode [2022-11-22 01:50:08,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:50:08,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:50:08,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:50:08,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:50:08,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,701 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 952 [2022-11-22 01:50:08,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:50:08,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:50:08,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:50:08,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:50:08,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,750 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:50:08,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:50:08,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:50:08,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:50:08,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (1/1) ... [2022-11-22 01:50:08,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:50:08,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:08,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:50:08,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:50:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:50:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:50:08,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:50:08,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:50:09,060 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:50:09,061 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:50:10,415 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:50:11,601 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:50:11,601 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:50:11,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:50:11 BoogieIcfgContainer [2022-11-22 01:50:11,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:50:11,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:50:11,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:50:11,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:50:11,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:50:08" (1/3) ... [2022-11-22 01:50:11,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6877be6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:50:11, skipping insertion in model container [2022-11-22 01:50:11,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:08" (2/3) ... [2022-11-22 01:50:11,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6877be6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:50:11, skipping insertion in model container [2022-11-22 01:50:11,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:50:11" (3/3) ... [2022-11-22 01:50:11,621 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2022-11-22 01:50:11,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:50:11,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:50:11,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:50:11,720 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;@5e2d47fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:50:11,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:50:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:50:11,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:11,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:11,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1187982689, now seen corresponding path program 1 times [2022-11-22 01:50:11,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:11,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019649854] [2022-11-22 01:50:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:11,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:16,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:16,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019649854] [2022-11-22 01:50:16,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019649854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:16,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:16,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606774156] [2022-11-22 01:50:16,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:16,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:16,570 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:16,806 INFO L93 Difference]: Finished difference Result 177 states and 288 transitions. [2022-11-22 01:50:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-22 01:50:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:16,819 INFO L225 Difference]: With dead ends: 177 [2022-11-22 01:50:16,819 INFO L226 Difference]: Without dead ends: 158 [2022-11-22 01:50:16,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:16,826 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 26 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:16,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 372 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-22 01:50:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2022-11-22 01:50:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2022-11-22 01:50:16,872 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2022-11-22 01:50:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:16,873 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2022-11-22 01:50:16,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2022-11-22 01:50:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 01:50:16,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:16,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:16,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:50:16,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1895417084, now seen corresponding path program 1 times [2022-11-22 01:50:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:16,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928775104] [2022-11-22 01:50:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:16,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:19,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928775104] [2022-11-22 01:50:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928775104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:19,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:19,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622296375] [2022-11-22 01:50:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:19,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:19,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:19,477 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:19,710 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2022-11-22 01:50:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-22 01:50:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:19,712 INFO L225 Difference]: With dead ends: 180 [2022-11-22 01:50:19,712 INFO L226 Difference]: Without dead ends: 160 [2022-11-22 01:50:19,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:19,714 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:19,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-22 01:50:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-22 01:50:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2022-11-22 01:50:19,738 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2022-11-22 01:50:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:19,739 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2022-11-22 01:50:19,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2022-11-22 01:50:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 01:50:19,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:19,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:19,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:50:19,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1308889514, now seen corresponding path program 1 times [2022-11-22 01:50:19,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:19,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209233139] [2022-11-22 01:50:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:22,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209233139] [2022-11-22 01:50:22,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209233139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:22,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:22,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266684766] [2022-11-22 01:50:22,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:22,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:22,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:22,192 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:22,428 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2022-11-22 01:50:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:22,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-22 01:50:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:22,431 INFO L225 Difference]: With dead ends: 180 [2022-11-22 01:50:22,431 INFO L226 Difference]: Without dead ends: 160 [2022-11-22 01:50:22,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:22,432 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:22,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-22 01:50:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-22 01:50:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2022-11-22 01:50:22,453 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2022-11-22 01:50:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:22,453 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2022-11-22 01:50:22,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2022-11-22 01:50:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 01:50:22,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:22,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:22,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:50:22,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1863597997, now seen corresponding path program 1 times [2022-11-22 01:50:22,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:22,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260458763] [2022-11-22 01:50:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:24,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:24,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260458763] [2022-11-22 01:50:24,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260458763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:24,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:24,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:24,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106348054] [2022-11-22 01:50:24,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:24,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:24,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:24,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:24,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:24,734 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:24,921 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2022-11-22 01:50:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-22 01:50:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:24,923 INFO L225 Difference]: With dead ends: 180 [2022-11-22 01:50:24,924 INFO L226 Difference]: Without dead ends: 160 [2022-11-22 01:50:24,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:24,925 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:24,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-22 01:50:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-22 01:50:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2022-11-22 01:50:24,947 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2022-11-22 01:50:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:24,948 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2022-11-22 01:50:24,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2022-11-22 01:50:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 01:50:24,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:24,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:50:24,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1885143539, now seen corresponding path program 1 times [2022-11-22 01:50:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259055373] [2022-11-22 01:50:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:27,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:27,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259055373] [2022-11-22 01:50:27,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259055373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:27,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:27,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:27,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659912330] [2022-11-22 01:50:27,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:27,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:27,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:27,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:27,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:27,008 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:27,172 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2022-11-22 01:50:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-22 01:50:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:27,174 INFO L225 Difference]: With dead ends: 180 [2022-11-22 01:50:27,174 INFO L226 Difference]: Without dead ends: 160 [2022-11-22 01:50:27,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:27,176 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:27,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 382 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-22 01:50:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-22 01:50:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2022-11-22 01:50:27,184 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2022-11-22 01:50:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:27,185 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2022-11-22 01:50:27,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2022-11-22 01:50:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 01:50:27,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:27,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:50:27,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1965328987, now seen corresponding path program 1 times [2022-11-22 01:50:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160568975] [2022-11-22 01:50:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:30,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:30,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160568975] [2022-11-22 01:50:30,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160568975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:30,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:30,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175943397] [2022-11-22 01:50:30,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:30,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:30,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:30,053 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:30,226 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2022-11-22 01:50:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-22 01:50:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:30,227 INFO L225 Difference]: With dead ends: 178 [2022-11-22 01:50:30,227 INFO L226 Difference]: Without dead ends: 158 [2022-11-22 01:50:30,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:30,229 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:30,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-22 01:50:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-11-22 01:50:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2022-11-22 01:50:30,236 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2022-11-22 01:50:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:30,236 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2022-11-22 01:50:30,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2022-11-22 01:50:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 01:50:30,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:30,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:30,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:50:30,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:30,238 INFO L85 PathProgramCache]: Analyzing trace with hash 707640868, now seen corresponding path program 1 times [2022-11-22 01:50:30,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:30,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297150122] [2022-11-22 01:50:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:30,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:32,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:32,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297150122] [2022-11-22 01:50:32,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297150122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:32,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:32,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:32,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415931232] [2022-11-22 01:50:32,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:32,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:32,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:32,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:32,616 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:32,805 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2022-11-22 01:50:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-22 01:50:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:32,807 INFO L225 Difference]: With dead ends: 179 [2022-11-22 01:50:32,807 INFO L226 Difference]: Without dead ends: 159 [2022-11-22 01:50:32,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:32,808 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:32,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 564 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-22 01:50:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2022-11-22 01:50:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2022-11-22 01:50:32,820 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2022-11-22 01:50:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:32,820 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2022-11-22 01:50:32,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2022-11-22 01:50:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 01:50:32,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:32,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:50:32,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1345971062, now seen corresponding path program 1 times [2022-11-22 01:50:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:32,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923628926] [2022-11-22 01:50:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:32,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:35,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:35,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923628926] [2022-11-22 01:50:35,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923628926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:35,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:35,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:35,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103405273] [2022-11-22 01:50:35,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:35,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:35,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:35,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:35,186 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:35,340 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2022-11-22 01:50:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-22 01:50:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:35,342 INFO L225 Difference]: With dead ends: 179 [2022-11-22 01:50:35,342 INFO L226 Difference]: Without dead ends: 159 [2022-11-22 01:50:35,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:35,343 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:35,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:50:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-22 01:50:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2022-11-22 01:50:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2022-11-22 01:50:35,355 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2022-11-22 01:50:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:35,358 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2022-11-22 01:50:35,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2022-11-22 01:50:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 01:50:35,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:35,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:35,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:50:35,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:35,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1215858095, now seen corresponding path program 1 times [2022-11-22 01:50:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:35,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871554042] [2022-11-22 01:50:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:35,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:35,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871554042] [2022-11-22 01:50:35,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871554042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:35,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:35,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:50:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537798971] [2022-11-22 01:50:35,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:35,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:50:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:50:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:50:35,782 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:36,077 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2022-11-22 01:50:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:50:36,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-22 01:50:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:36,078 INFO L225 Difference]: With dead ends: 201 [2022-11-22 01:50:36,078 INFO L226 Difference]: Without dead ends: 181 [2022-11-22 01:50:36,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:50:36,079 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 45 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:36,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 776 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-22 01:50:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2022-11-22 01:50:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2022-11-22 01:50:36,093 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2022-11-22 01:50:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:36,093 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2022-11-22 01:50:36,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2022-11-22 01:50:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 01:50:36,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:36,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:36,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:50:36,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:36,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash -641408856, now seen corresponding path program 1 times [2022-11-22 01:50:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:36,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571239914] [2022-11-22 01:50:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:41,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571239914] [2022-11-22 01:50:41,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571239914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577990393] [2022-11-22 01:50:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:41,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:41,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:41,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:41,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ece240b0-5c6f-49af-afa3-b7910afd3b38/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:50:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:41,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:50:41,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:41,808 INFO L328 TraceCheckSpWp]: Computing backward predicates...