./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a870e8a4a7dff1b238c9b19b47586f7abd44e3f0eb9969b7dad7bbd7f80e506 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:18:38,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:18:38,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:18:38,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:18:38,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:18:38,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:18:38,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:18:38,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:18:38,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:18:38,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:18:38,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:18:38,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:18:38,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:18:38,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:18:38,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:18:38,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:18:38,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:18:38,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:18:38,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:18:38,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:18:38,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:18:38,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:18:38,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:18:38,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:18:38,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:18:38,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:18:38,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:18:38,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:18:38,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:18:38,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:18:38,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:18:38,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:18:38,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:18:38,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:18:38,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:18:38,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:18:38,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:18:38,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:18:38,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:18:38,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:18:38,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:18:38,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:18:38,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:18:38,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:18:38,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:18:38,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:18:38,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:18:38,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:18:38,112 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:18:38,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:18:38,112 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:18:38,112 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:18:38,112 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:18:38,113 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:18:38,113 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:18:38,113 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:18:38,113 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:18:38,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:18:38,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:18:38,113 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:18:38,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:18:38,114 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:18:38,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:18:38,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:18:38,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:18:38,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:18:38,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:18:38,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:18:38,115 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:18:38,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:18:38,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:18:38,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:18:38,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:18:38,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:18:38,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:18:38,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:18:38,116 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:18:38,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:18:38,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:18:38,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:18:38,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:18:38,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:18:38,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:18:38,117 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_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a870e8a4a7dff1b238c9b19b47586f7abd44e3f0eb9969b7dad7bbd7f80e506 [2022-12-14 11:18:38,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:18:38,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:18:38,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:18:38,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:18:38,305 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:18:38,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-pthread/cs_stack-2.i [2022-12-14 11:18:40,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:18:41,092 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:18:41,093 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/sv-benchmarks/c/seq-pthread/cs_stack-2.i [2022-12-14 11:18:41,109 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/data/a33d149d1/6a53d0dafd094c1ea1c43ce3855962f8/FLAG2d85494a0 [2022-12-14 11:18:41,452 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/data/a33d149d1/6a53d0dafd094c1ea1c43ce3855962f8 [2022-12-14 11:18:41,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:18:41,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:18:41,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:18:41,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:18:41,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:18:41,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:18:41" (1/1) ... [2022-12-14 11:18:41,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8c585a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:41, skipping insertion in model container [2022-12-14 11:18:41,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:18:41" (1/1) ... [2022-12-14 11:18:41,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:18:41,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:18:41,794 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_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/sv-benchmarks/c/seq-pthread/cs_stack-2.i[34556,34569] [2022-12-14 11:18:41,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:18:41,880 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:18:41,911 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_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/sv-benchmarks/c/seq-pthread/cs_stack-2.i[34556,34569] [2022-12-14 11:18:41,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:18:42,000 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:18:42,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42 WrapperNode [2022-12-14 11:18:42,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:18:42,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:18:42,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:18:42,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:18:42,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,050 INFO L138 Inliner]: procedures = 252, calls = 268, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 601 [2022-12-14 11:18:42,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:18:42,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:18:42,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:18:42,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:18:42,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:18:42,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:18:42,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:18:42,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:18:42,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (1/1) ... [2022-12-14 11:18:42,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:18:42,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:18:42,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:18:42,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af55eee-23f3-4e12-8f4c-44af6f9d48f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:18:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 11:18:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 11:18:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:18:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2022-12-14 11:18:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2022-12-14 11:18:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2022-12-14 11:18:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure get_top [2022-12-14 11:18:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure get_top [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 11:18:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2022-12-14 11:18:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2022-12-14 11:18:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2022-12-14 11:18:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2022-12-14 11:18:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-12-14 11:18:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-12-14 11:18:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 11:18:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 11:18:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2022-12-14 11:18:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2022-12-14 11:18:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:18:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:18:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:18:42,308 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:18:42,310 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:18:42,347 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,347 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2022-12-14 11:18:42,366 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L930-1: assume 0 != ~__CS_ret~0 % 256; [2022-12-14 11:18:42,366 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L930-1: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,366 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,366 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0 != ~__CS_ret~0 % 256; [2022-12-14 11:18:42,367 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##7: assume 0 != ~__CS_ret~0 % 256; [2022-12-14 11:18:42,367 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,367 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,367 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != ~__CS_ret~0 % 256; [2022-12-14 11:18:42,367 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L930: SUMMARY for call __CS_cs(); srcloc: null [2022-12-14 11:18:42,666 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,666 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume 0 != ~__CS_ret~0 % 256;push_#res#1 := 0; [2022-12-14 11:18:42,666 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##53: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##58: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##57: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1002: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1002: assume !(0 != ~__CS_ret~0 % 256);pop_#res#1 := 0; [2022-12-14 11:18:42,667 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L986-4: SUMMARY for call __CS_cs(); srcloc: null [2022-12-14 11:18:42,668 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##111: assume 0 != ~__CS_ret~0 % 256;push_#res#1 := 0; [2022-12-14 11:18:42,668 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##112: assume !(0 != ~__CS_ret~0 % 256); [2022-12-14 11:18:44,902 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:18:44,992 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:18:44,992 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:18:44,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:18:44 BoogieIcfgContainer [2022-12-14 11:18:44,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:18:44,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:18:44,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:18:44,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:18:44,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:18:41" (1/3) ... [2022-12-14 11:18:44,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f0144b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:18:44, skipping insertion in model container [2022-12-14 11:18:44,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:42" (2/3) ... [2022-12-14 11:18:44,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f0144b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:18:44, skipping insertion in model container [2022-12-14 11:18:44,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:18:44" (3/3) ... [2022-12-14 11:18:45,000 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_stack-2.i [2022-12-14 11:18:45,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:18:45,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:18:45,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:18:45,057 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;@4bb3a483, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:18:45,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:18:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 196 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 113 states have internal predecessors, (159), 75 states have call successors, (75), 9 states have call predecessors, (75), 9 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-12-14 11:18:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 11:18:45,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:18:45,073 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:18:45,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:18:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:18:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1707774654, now seen corresponding path program 1 times [2022-12-14 11:18:45,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:18:45,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478812980] [2022-12-14 11:18:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:45,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:18:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:19:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-14 11:19:11,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:19:11,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478812980] [2022-12-14 11:19:11,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478812980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:19:11,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:19:11,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:19:11,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603586663] [2022-12-14 11:19:11,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:19:11,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:19:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:19:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:19:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:19:11,231 INFO L87 Difference]: Start difference. First operand has 196 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 113 states have internal predecessors, (159), 75 states have call successors, (75), 9 states have call predecessors, (75), 9 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 11:19:13,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:19:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:19:13,476 INFO L93 Difference]: Finished difference Result 383 states and 609 transitions. [2022-12-14 11:19:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:19:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 65 [2022-12-14 11:19:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:19:13,491 INFO L225 Difference]: With dead ends: 383 [2022-12-14 11:19:13,491 INFO L226 Difference]: Without dead ends: 344 [2022-12-14 11:19:13,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:19:13,496 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 257 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:19:13,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1004 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 11:19:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-12-14 11:19:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 340. [2022-12-14 11:19:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 192 states have (on average 1.46875) internal successors, (282), 196 states have internal predecessors, (282), 131 states have call successors, (131), 17 states have call predecessors, (131), 16 states have return successors, (135), 128 states have call predecessors, (135), 131 states have call successors, (135) [2022-12-14 11:19:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 548 transitions. [2022-12-14 11:19:13,613 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 548 transitions. Word has length 65 [2022-12-14 11:19:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:19:13,613 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 548 transitions. [2022-12-14 11:19:13,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 11:19:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 548 transitions. [2022-12-14 11:19:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 11:19:13,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:19:13,628 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:19:13,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:19:13,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:19:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:19:13,630 INFO L85 PathProgramCache]: Analyzing trace with hash -762434021, now seen corresponding path program 1 times [2022-12-14 11:19:13,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:19:13,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565566975] [2022-12-14 11:19:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:19:13,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:19:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:19:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-12-14 11:19:41,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:19:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565566975] [2022-12-14 11:19:41,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565566975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:19:41,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:19:41,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:19:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409714490] [2022-12-14 11:19:41,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:19:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:19:41,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:19:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:19:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:19:41,969 INFO L87 Difference]: Start difference. First operand 340 states and 548 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:19:43,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:19:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:19:44,253 INFO L93 Difference]: Finished difference Result 672 states and 1086 transitions. [2022-12-14 11:19:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:19:44,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2022-12-14 11:19:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:19:44,262 INFO L225 Difference]: With dead ends: 672 [2022-12-14 11:19:44,263 INFO L226 Difference]: Without dead ends: 637 [2022-12-14 11:19:44,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:19:44,266 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 309 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:19:44,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 900 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 11:19:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-12-14 11:19:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 627. [2022-12-14 11:19:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 352 states have (on average 1.4744318181818181) internal successors, (519), 363 states have internal predecessors, (519), 243 states have call successors, (243), 30 states have call predecessors, (243), 31 states have return successors, (263), 237 states have call predecessors, (263), 243 states have call successors, (263) [2022-12-14 11:19:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1025 transitions. [2022-12-14 11:19:44,340 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1025 transitions. Word has length 123 [2022-12-14 11:19:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:19:44,340 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 1025 transitions. [2022-12-14 11:19:44,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:19:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1025 transitions. [2022-12-14 11:19:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 11:19:44,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:19:44,348 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:19:44,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:19:44,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:19:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:19:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1829359845, now seen corresponding path program 1 times [2022-12-14 11:19:44,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:19:44,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428946184] [2022-12-14 11:19:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:19:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:19:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-12-14 11:20:14,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:20:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428946184] [2022-12-14 11:20:14,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428946184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:20:14,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:20:14,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:20:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523365452] [2022-12-14 11:20:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:20:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:20:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:20:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:20:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:20:14,691 INFO L87 Difference]: Start difference. First operand 627 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:20:16,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:20:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:20:16,961 INFO L93 Difference]: Finished difference Result 1251 states and 2029 transitions. [2022-12-14 11:20:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:20:16,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2022-12-14 11:20:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:20:16,965 INFO L225 Difference]: With dead ends: 1251 [2022-12-14 11:20:16,965 INFO L226 Difference]: Without dead ends: 641 [2022-12-14 11:20:16,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:20:16,969 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 330 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:20:16,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 857 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 11:20:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-12-14 11:20:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 629. [2022-12-14 11:20:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 353 states have (on average 1.4674220963172804) internal successors, (518), 366 states have internal predecessors, (518), 242 states have call successors, (242), 30 states have call predecessors, (242), 33 states have return successors, (259), 236 states have call predecessors, (259), 242 states have call successors, (259) [2022-12-14 11:20:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1019 transitions. [2022-12-14 11:20:17,003 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1019 transitions. Word has length 123 [2022-12-14 11:20:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:20:17,003 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 1019 transitions. [2022-12-14 11:20:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:20:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1019 transitions. [2022-12-14 11:20:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 11:20:17,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:20:17,008 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:20:17,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:20:17,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:20:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:20:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1586348666, now seen corresponding path program 1 times [2022-12-14 11:20:17,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:20:17,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531724985] [2022-12-14 11:20:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:17,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:20:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-12-14 11:20:47,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:20:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531724985] [2022-12-14 11:20:47,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531724985] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:20:47,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:20:47,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:20:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237461348] [2022-12-14 11:20:47,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:20:47,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:20:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:20:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:20:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:20:47,957 INFO L87 Difference]: Start difference. First operand 629 states and 1019 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:20:49,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:20:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:20:50,263 INFO L93 Difference]: Finished difference Result 1031 states and 1637 transitions. [2022-12-14 11:20:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:20:50,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 123 [2022-12-14 11:20:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:20:50,266 INFO L225 Difference]: With dead ends: 1031 [2022-12-14 11:20:50,266 INFO L226 Difference]: Without dead ends: 549 [2022-12-14 11:20:50,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:20:50,269 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 313 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:20:50,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 833 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 11:20:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-12-14 11:20:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 537. [2022-12-14 11:20:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 301 states have (on average 1.4385382059800664) internal successors, (433), 311 states have internal predecessors, (433), 203 states have call successors, (203), 30 states have call predecessors, (203), 32 states have return successors, (219), 198 states have call predecessors, (219), 203 states have call successors, (219) [2022-12-14 11:20:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 855 transitions. [2022-12-14 11:20:50,296 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 855 transitions. Word has length 123 [2022-12-14 11:20:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:20:50,297 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 855 transitions. [2022-12-14 11:20:50,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:20:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 855 transitions. [2022-12-14 11:20:50,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 11:20:50,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:20:50,300 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:20:50,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:20:50,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:20:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:20:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 398468463, now seen corresponding path program 1 times [2022-12-14 11:20:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:20:50,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022030180] [2022-12-14 11:20:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:50,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:20:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-12-14 11:21:18,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:21:18,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022030180] [2022-12-14 11:21:18,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022030180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:21:18,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:21:18,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:21:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993293003] [2022-12-14 11:21:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:21:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:21:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:21:18,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:21:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:21:18,572 INFO L87 Difference]: Start difference. First operand 537 states and 855 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 11:21:20,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:21:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:21:20,730 INFO L93 Difference]: Finished difference Result 611 states and 955 transitions. [2022-12-14 11:21:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:21:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) Word has length 126 [2022-12-14 11:21:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:21:20,733 INFO L225 Difference]: With dead ends: 611 [2022-12-14 11:21:20,733 INFO L226 Difference]: Without dead ends: 536 [2022-12-14 11:21:20,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:21:20,734 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 182 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:21:20,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 945 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 11:21:20,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-12-14 11:21:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 530. [2022-12-14 11:21:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 297 states have (on average 1.4343434343434343) internal successors, (426), 306 states have internal predecessors, (426), 201 states have call successors, (201), 30 states have call predecessors, (201), 31 states have return successors, (214), 196 states have call predecessors, (214), 201 states have call successors, (214) [2022-12-14 11:21:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 841 transitions. [2022-12-14 11:21:20,758 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 841 transitions. Word has length 126 [2022-12-14 11:21:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:21:20,758 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 841 transitions. [2022-12-14 11:21:20,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 11:21:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 841 transitions. [2022-12-14 11:21:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 11:21:20,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:21:20,761 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:21:20,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:21:20,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:21:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:21:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash -754132946, now seen corresponding path program 1 times [2022-12-14 11:21:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:21:20,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659059209] [2022-12-14 11:21:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat