./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7 --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 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:41:54,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:41:54,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:41:54,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:41:54,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:41:54,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:41:54,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:41:54,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:41:54,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:41:54,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:41:54,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:41:54,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:41:54,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:41:54,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:41:54,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:41:54,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:41:54,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:41:54,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:41:54,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:41:54,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:41:54,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:41:54,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:41:54,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:41:54,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:41:54,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:41:54,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:41:54,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:41:54,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:41:54,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:41:54,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:41:54,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:41:54,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:41:54,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:41:54,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:41:54,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:41:54,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:41:54,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:41:54,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:41:54,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:41:54,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:41:54,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:41:54,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:41:54,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:41:54,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:41:54,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:41:54,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:41:54,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:41:54,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:41:54,236 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:41:54,236 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:41:54,237 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:41:54,237 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:41:54,237 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:41:54,238 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:41:54,238 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:41:54,239 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:41:54,239 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:41:54,239 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:41:54,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:41:54,240 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:41:54,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:41:54,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:41:54,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:41:54,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:41:54,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:41:54,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:41:54,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:41:54,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:41:54,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:41:54,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:41:54,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:41:54,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:41:54,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:41:54,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:41:54,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:41:54,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:41:54,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:41:54,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:41:54,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:41:54,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:41:54,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:41:54,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:41:54,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:41:54,248 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f [2021-11-25 18:41:54,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:41:54,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:41:54,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:41:54,521 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:41:54,521 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:41:54,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:41:54,596 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/data/f415abbdb/2a07547c7dce4d3c9022ac04598d7fe3/FLAG52c4f8136 [2021-11-25 18:41:55,111 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:41:55,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:41:55,122 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/data/f415abbdb/2a07547c7dce4d3c9022ac04598d7fe3/FLAG52c4f8136 [2021-11-25 18:41:55,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/data/f415abbdb/2a07547c7dce4d3c9022ac04598d7fe3 [2021-11-25 18:41:55,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:41:55,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:41:55,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:41:55,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:41:55,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:41:55,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ce3868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55, skipping insertion in model container [2021-11-25 18:41:55,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:41:55,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:41:55,772 WARN L230 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_bbf57409-9394-4b52-a371-379ecc02e7db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2021-11-25 18:41:55,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:41:55,818 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:41:55,856 WARN L230 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_bbf57409-9394-4b52-a371-379ecc02e7db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2021-11-25 18:41:55,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:41:55,895 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:41:55,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55 WrapperNode [2021-11-25 18:41:55,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:41:55,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:41:55,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:41:55,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:41:55,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,953 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 423 [2021-11-25 18:41:55,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:41:55,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:41:55,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:41:55,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:41:55,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:41:55,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:41:55,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:41:55,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:41:55,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (1/1) ... [2021-11-25 18:41:55,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:41:56,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:56,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:41:56,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:41:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:41:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:41:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:41:56,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:41:56,291 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:41:56,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:41:56,779 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:41:57,024 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:41:57,025 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:41:57,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:41:57 BoogieIcfgContainer [2021-11-25 18:41:57,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:41:57,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:41:57,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:41:57,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:41:57,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:41:55" (1/3) ... [2021-11-25 18:41:57,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599a4e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:41:57, skipping insertion in model container [2021-11-25 18:41:57,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:55" (2/3) ... [2021-11-25 18:41:57,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599a4e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:41:57, skipping insertion in model container [2021-11-25 18:41:57,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:41:57" (3/3) ... [2021-11-25 18:41:57,039 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:41:57,045 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:41:57,045 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:41:57,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:41:57,124 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:41:57,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:41:57,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 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) [2021-11-25 18:41:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 18:41:57,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:57,146 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:41:57,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:41:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2023666919, now seen corresponding path program 1 times [2021-11-25 18:41:57,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:57,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561138637] [2021-11-25 18:41:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:57,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:57,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:57,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561138637] [2021-11-25 18:41:57,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561138637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:57,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:57,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:41:57,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450354056] [2021-11-25 18:41:57,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:57,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:57,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:57,553 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-25 18:41:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:57,637 INFO L93 Difference]: Finished difference Result 189 states and 292 transitions. [2021-11-25 18:41:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:57,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2021-11-25 18:41:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:57,650 INFO L225 Difference]: With dead ends: 189 [2021-11-25 18:41:57,650 INFO L226 Difference]: Without dead ends: 127 [2021-11-25 18:41:57,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:57,657 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 101 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:57,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 259 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-25 18:41:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-25 18:41:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4112903225806452) internal successors, (175), 124 states have internal predecessors, (175), 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) [2021-11-25 18:41:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 175 transitions. [2021-11-25 18:41:57,707 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 175 transitions. Word has length 37 [2021-11-25 18:41:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:57,707 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 175 transitions. [2021-11-25 18:41:57,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-25 18:41:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 175 transitions. [2021-11-25 18:41:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 18:41:57,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:57,710 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:41:57,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:41:57,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:41:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:57,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1640261836, now seen corresponding path program 1 times [2021-11-25 18:41:57,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:57,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460158832] [2021-11-25 18:41:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:57,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:57,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:57,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460158832] [2021-11-25 18:41:57,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460158832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:57,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:57,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:41:57,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136146846] [2021-11-25 18:41:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:57,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:57,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:57,818 INFO L87 Difference]: Start difference. First operand 125 states and 175 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-11-25 18:41:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:57,915 INFO L93 Difference]: Finished difference Result 301 states and 439 transitions. [2021-11-25 18:41:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2021-11-25 18:41:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:57,920 INFO L225 Difference]: With dead ends: 301 [2021-11-25 18:41:57,924 INFO L226 Difference]: Without dead ends: 202 [2021-11-25 18:41:57,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:57,927 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 76 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:57,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 214 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:41:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-25 18:41:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-11-25 18:41:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4422110552763818) internal successors, (287), 199 states have internal predecessors, (287), 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) [2021-11-25 18:41:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 287 transitions. [2021-11-25 18:41:57,966 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 287 transitions. Word has length 40 [2021-11-25 18:41:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:57,966 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 287 transitions. [2021-11-25 18:41:57,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-11-25 18:41:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 287 transitions. [2021-11-25 18:41:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:41:57,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:57,969 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:41:57,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:41:57,969 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:41:57,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2012514755, now seen corresponding path program 1 times [2021-11-25 18:41:57,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:57,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767239717] [2021-11-25 18:41:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:57,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:58,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767239717] [2021-11-25 18:41:58,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767239717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:58,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:58,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:41:58,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531717807] [2021-11-25 18:41:58,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:58,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:58,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:58,106 INFO L87 Difference]: Start difference. First operand 200 states and 287 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-25 18:41:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:58,175 INFO L93 Difference]: Finished difference Result 504 states and 741 transitions. [2021-11-25 18:41:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:58,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-25 18:41:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:58,181 INFO L225 Difference]: With dead ends: 504 [2021-11-25 18:41:58,181 INFO L226 Difference]: Without dead ends: 330 [2021-11-25 18:41:58,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:58,184 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 71 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:58,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 199 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-25 18:41:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2021-11-25 18:41:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.452599388379205) internal successors, (475), 327 states have internal predecessors, (475), 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) [2021-11-25 18:41:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 475 transitions. [2021-11-25 18:41:58,248 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 475 transitions. Word has length 43 [2021-11-25 18:41:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:58,248 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 475 transitions. [2021-11-25 18:41:58,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-25 18:41:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 475 transitions. [2021-11-25 18:41:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:41:58,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:58,250 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:41:58,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:41:58,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:41:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash 125802477, now seen corresponding path program 1 times [2021-11-25 18:41:58,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492044266] [2021-11-25 18:41:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:58,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:58,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:58,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492044266] [2021-11-25 18:41:58,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492044266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:58,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:58,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:41:58,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333210170] [2021-11-25 18:41:58,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:58,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:58,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:58,362 INFO L87 Difference]: Start difference. First operand 328 states and 475 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:58,441 INFO L93 Difference]: Finished difference Result 844 states and 1237 transitions. [2021-11-25 18:41:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-25 18:41:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:58,448 INFO L225 Difference]: With dead ends: 844 [2021-11-25 18:41:58,448 INFO L226 Difference]: Without dead ends: 542 [2021-11-25 18:41:58,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:58,453 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 66 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:58,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-25 18:41:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2021-11-25 18:41:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4452690166975881) internal successors, (779), 539 states have internal predecessors, (779), 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) [2021-11-25 18:41:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 779 transitions. [2021-11-25 18:41:58,514 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 779 transitions. Word has length 46 [2021-11-25 18:41:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:58,515 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 779 transitions. [2021-11-25 18:41:58,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 779 transitions. [2021-11-25 18:41:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:41:58,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:58,536 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:41:58,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:41:58,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:41:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1177829407, now seen corresponding path program 1 times [2021-11-25 18:41:58,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:58,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527587812] [2021-11-25 18:41:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:58,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:58,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:58,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527587812] [2021-11-25 18:41:58,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527587812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:58,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:58,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:41:58,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479166061] [2021-11-25 18:41:58,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:58,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:41:58,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:41:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:41:58,732 INFO L87 Difference]: Start difference. First operand 540 states and 779 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-25 18:41:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:59,031 INFO L93 Difference]: Finished difference Result 2244 states and 3247 transitions. [2021-11-25 18:41:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:41:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-25 18:41:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:59,043 INFO L225 Difference]: With dead ends: 2244 [2021-11-25 18:41:59,043 INFO L226 Difference]: Without dead ends: 1730 [2021-11-25 18:41:59,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:41:59,056 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 303 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:59,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 395 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:41:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-11-25 18:41:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1724. [2021-11-25 18:41:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.441091120139292) internal successors, (2483), 1723 states have internal predecessors, (2483), 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) [2021-11-25 18:41:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2483 transitions. [2021-11-25 18:41:59,255 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2483 transitions. Word has length 49 [2021-11-25 18:41:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:59,257 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 2483 transitions. [2021-11-25 18:41:59,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-25 18:41:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2483 transitions. [2021-11-25 18:41:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:41:59,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:59,258 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:41:59,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:41:59,259 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:41:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1105029325, now seen corresponding path program 1 times [2021-11-25 18:41:59,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:59,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676148697] [2021-11-25 18:41:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:59,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:59,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676148697] [2021-11-25 18:41:59,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676148697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:59,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:59,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 18:41:59,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542957866] [2021-11-25 18:41:59,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:59,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:41:59,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:41:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:41:59,497 INFO L87 Difference]: Start difference. First operand 1724 states and 2483 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2021-11-25 18:42:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:00,162 INFO L93 Difference]: Finished difference Result 4370 states and 6402 transitions. [2021-11-25 18:42:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:42:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 51 [2021-11-25 18:42:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:00,189 INFO L225 Difference]: With dead ends: 4370 [2021-11-25 18:42:00,189 INFO L226 Difference]: Without dead ends: 4368 [2021-11-25 18:42:00,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:42:00,192 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 938 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:00,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 1140 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:42:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2021-11-25 18:42:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 1973. [2021-11-25 18:42:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.4447261663286004) internal successors, (2849), 1972 states have internal predecessors, (2849), 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) [2021-11-25 18:42:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2849 transitions. [2021-11-25 18:42:00,449 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2849 transitions. Word has length 51 [2021-11-25 18:42:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:00,449 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 2849 transitions. [2021-11-25 18:42:00,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2021-11-25 18:42:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2849 transitions. [2021-11-25 18:42:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:42:00,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:00,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:00,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:42:00,452 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:42:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1961993484, now seen corresponding path program 1 times [2021-11-25 18:42:00,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:00,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184800399] [2021-11-25 18:42:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:00,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:42:01,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184800399] [2021-11-25 18:42:01,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184800399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020767614] [2021-11-25 18:42:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:01,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:01,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:01,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:01,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:42:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 18:42:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:42:04,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:42:15,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020767614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:42:15,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748399304] [2021-11-25 18:42:15,023 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-25 18:42:15,024 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:15,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:15,033 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:15,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:15,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:15,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:15,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:42:15,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:15,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:15,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:15,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:42:41,919 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:43:03,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21714#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_19276~0 1) (<= ~send3~0 127) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~p4~0 0) (<= ~st3~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~send4~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 1 ~__return_19141~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~__return_19276~0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (= ~__return_main~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 18:43:03,543 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:43:03,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:43:03,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2021-11-25 18:43:03,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195809844] [2021-11-25 18:43:03,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:43:03,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 18:43:03,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:43:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 18:43:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=7823, Unknown=0, NotChecked=0, Total=9120 [2021-11-25 18:43:03,549 INFO L87 Difference]: Start difference. First operand 1973 states and 2849 transitions. Second operand has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2021-11-25 18:44:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:44:45,197 INFO L93 Difference]: Finished difference Result 47178 states and 68760 transitions. [2021-11-25 18:44:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2021-11-25 18:44:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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 [2021-11-25 18:44:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:44:45,404 INFO L225 Difference]: With dead ends: 47178 [2021-11-25 18:44:45,404 INFO L226 Difference]: Without dead ends: 45259 [2021-11-25 18:44:45,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81001 ImplicationChecksByTransitivity, 104.4s TimeCoverageRelationStatistics Valid=27108, Invalid=150554, Unknown=0, NotChecked=0, Total=177662 [2021-11-25 18:44:45,469 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 12975 mSDsluCounter, 6896 mSDsCounter, 0 mSdLazyCounter, 10107 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12975 SdHoareTripleChecker+Valid, 7139 SdHoareTripleChecker+Invalid, 11019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 10107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:44:45,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12975 Valid, 7139 Invalid, 11019 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 10107 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2021-11-25 18:44:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45259 states. [2021-11-25 18:44:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45259 to 15420. [2021-11-25 18:44:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15420 states, 15419 states have (on average 1.4206498475906348) internal successors, (21905), 15419 states have internal predecessors, (21905), 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) [2021-11-25 18:44:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15420 states to 15420 states and 21905 transitions. [2021-11-25 18:44:49,448 INFO L78 Accepts]: Start accepts. Automaton has 15420 states and 21905 transitions. Word has length 61 [2021-11-25 18:44:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:44:49,448 INFO L470 AbstractCegarLoop]: Abstraction has 15420 states and 21905 transitions. [2021-11-25 18:44:49,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2021-11-25 18:44:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 15420 states and 21905 transitions. [2021-11-25 18:44:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:44:49,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:44:49,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:44:49,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:44:49,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:44:49,671 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:44:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:44:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash -431881859, now seen corresponding path program 1 times [2021-11-25 18:44:49,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:44:49,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132877697] [2021-11-25 18:44:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:49,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:44:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:44:49,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:44:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132877697] [2021-11-25 18:44:49,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132877697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:44:49,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:44:49,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:44:49,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102233698] [2021-11-25 18:44:49,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:44:49,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:44:49,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:44:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:44:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:44:49,728 INFO L87 Difference]: Start difference. First operand 15420 states and 21905 transitions. Second operand has 5 states, 5 states have (on average 11.6) 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) [2021-11-25 18:44:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:44:53,797 INFO L93 Difference]: Finished difference Result 37559 states and 53633 transitions. [2021-11-25 18:44:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:44:53,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) 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 61 [2021-11-25 18:44:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:44:53,858 INFO L225 Difference]: With dead ends: 37559 [2021-11-25 18:44:53,858 INFO L226 Difference]: Without dead ends: 22295 [2021-11-25 18:44:53,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:44:53,882 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 431 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:44:53,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 118 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:44:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22295 states. [2021-11-25 18:44:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22295 to 22293. [2021-11-25 18:44:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22293 states, 22292 states have (on average 1.4175937556073928) internal successors, (31601), 22292 states have internal predecessors, (31601), 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) [2021-11-25 18:44:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22293 states to 22293 states and 31601 transitions. [2021-11-25 18:44:58,181 INFO L78 Accepts]: Start accepts. Automaton has 22293 states and 31601 transitions. Word has length 61 [2021-11-25 18:44:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:44:58,181 INFO L470 AbstractCegarLoop]: Abstraction has 22293 states and 31601 transitions. [2021-11-25 18:44:58,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) 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) [2021-11-25 18:44:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 22293 states and 31601 transitions. [2021-11-25 18:44:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:44:58,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:44:58,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:44:58,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:44:58,185 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:44:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:44:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash -296120648, now seen corresponding path program 1 times [2021-11-25 18:44:58,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:44:58,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669740974] [2021-11-25 18:44:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:58,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:44:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:58,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:44:58,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669740974] [2021-11-25 18:44:58,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669740974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:44:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463607713] [2021-11-25 18:44:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:58,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:44:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:44:58,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:44:58,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf57409-9394-4b52-a371-379ecc02e7db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:44:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-25 18:44:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:45:00,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:45:10,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463607713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846976562] [2021-11-25 18:45:10,854 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-25 18:45:10,855 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:45:10,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:45:10,855 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:45:10,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:45:11,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:45:11,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:45:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:45:11,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:45:11,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:45:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:45:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:45:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:45:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:45:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:45:11,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:45:52,194 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:46:14,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '219626#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_19276~0 1) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~p4~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 1 ~__return_19141~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~__return_19276~0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 18:46:14,544 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:46:14,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:46:14,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2021-11-25 18:46:14,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585606158] [2021-11-25 18:46:14,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:46:14,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 18:46:14,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:46:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 18:46:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1292, Invalid=7828, Unknown=0, NotChecked=0, Total=9120 [2021-11-25 18:46:14,548 INFO L87 Difference]: Start difference. First operand 22293 states and 31601 transitions. Second operand has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2021-11-25 18:48:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:42,120 INFO L93 Difference]: Finished difference Result 227232 states and 324543 transitions. [2021-11-25 18:48:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 391 states. [2021-11-25 18:48:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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 [2021-11-25 18:48:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:42,903 INFO L225 Difference]: With dead ends: 227232 [2021-11-25 18:48:42,903 INFO L226 Difference]: Without dead ends: 204973 [2021-11-25 18:48:42,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106921 ImplicationChecksByTransitivity, 115.5s TimeCoverageRelationStatistics Valid=34303, Invalid=197539, Unknown=0, NotChecked=0, Total=231842 [2021-11-25 18:48:42,997 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 14375 mSDsluCounter, 6665 mSDsCounter, 0 mSdLazyCounter, 10187 mSolverCounterSat, 1002 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14375 SdHoareTripleChecker+Valid, 6996 SdHoareTripleChecker+Invalid, 11189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 10187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:42,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14375 Valid, 6996 Invalid, 11189 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1002 Valid, 10187 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2021-11-25 18:48:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204973 states.