./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c802d0dd4f8edaf03f1251784a424c8f295192f6a4e7c65ec93469eacce08251 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:16:32,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:16:32,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:16:32,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:16:32,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:16:32,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:16:32,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:16:32,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:16:32,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:16:32,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:16:32,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:16:32,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:16:32,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:16:32,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:16:32,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:16:32,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:16:32,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:16:32,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:16:32,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:16:32,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:16:32,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:16:32,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:16:32,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:16:32,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:16:32,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:16:32,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:16:32,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:16:32,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:16:32,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:16:32,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:16:32,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:16:32,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:16:32,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:16:32,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:16:32,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:16:32,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:16:32,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:16:32,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:16:32,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:16:32,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:16:32,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:16:32,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:16:32,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:16:32,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:16:32,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:16:32,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:16:32,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:16:32,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:16:32,164 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:16:32,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:16:32,164 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:16:32,165 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:16:32,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:16:32,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:16:32,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:16:32,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:16:32,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:16:32,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:16:32,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:16:32,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:16:32,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:16:32,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:16:32,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:16:32,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:16:32,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:16:32,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:16:32,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:16:32,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:16:32,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:16:32,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802d0dd4f8edaf03f1251784a424c8f295192f6a4e7c65ec93469eacce08251 [2022-12-14 09:16:32,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:16:32,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:16:32,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:16:32,350 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:16:32,351 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:16:32,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2022-12-14 09:16:34,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:16:35,084 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:16:35,085 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2022-12-14 09:16:35,092 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/data/b5b1ffb49/1088d0039caf41c0986cfe4e027465aa/FLAG7ee786033 [2022-12-14 09:16:35,106 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/data/b5b1ffb49/1088d0039caf41c0986cfe4e027465aa [2022-12-14 09:16:35,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:16:35,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:16:35,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:16:35,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:16:35,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:16:35,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d839fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35, skipping insertion in model container [2022-12-14 09:16:35,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:16:35,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:16:35,285 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2022-12-14 09:16:35,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:16:35,298 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:16:35,333 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2022-12-14 09:16:35,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:16:35,345 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:16:35,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35 WrapperNode [2022-12-14 09:16:35,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:16:35,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:16:35,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:16:35,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:16:35,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,380 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 522 [2022-12-14 09:16:35,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:16:35,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:16:35,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:16:35,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:16:35,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,402 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:16:35,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:16:35,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:16:35,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:16:35,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (1/1) ... [2022-12-14 09:16:35,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:16:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:35,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:16:35,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:16:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:16:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:16:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:16:35,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:16:35,542 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:16:35,544 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:16:35,556 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 09:16:35,969 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-12-14 09:16:35,969 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-12-14 09:16:35,969 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:16:36,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:16:36,079 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:16:36,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:16:36 BoogieIcfgContainer [2022-12-14 09:16:36,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:16:36,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:16:36,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:16:36,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:16:36,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:16:35" (1/3) ... [2022-12-14 09:16:36,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3627fea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:16:36, skipping insertion in model container [2022-12-14 09:16:36,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:16:35" (2/3) ... [2022-12-14 09:16:36,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3627fea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:16:36, skipping insertion in model container [2022-12-14 09:16:36,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:16:36" (3/3) ... [2022-12-14 09:16:36,089 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_3a_alt.BV.c.cil.c [2022-12-14 09:16:36,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:16:36,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:16:36,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:16:36,151 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a7b9ee6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:16:36,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:16:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 102 states have (on average 1.7843137254901962) internal successors, (182), 103 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 09:16:36,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:36,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:36,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:36,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1721560473, now seen corresponding path program 1 times [2022-12-14 09:16:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:36,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761012084] [2022-12-14 09:16:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:36,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761012084] [2022-12-14 09:16:36,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761012084] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:36,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:36,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:16:36,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711694030] [2022-12-14 09:16:36,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:36,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:36,490 INFO L87 Difference]: Start difference. First operand has 104 states, 102 states have (on average 1.7843137254901962) internal successors, (182), 103 states have internal predecessors, (182), 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 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:36,631 INFO L93 Difference]: Finished difference Result 227 states and 396 transitions. [2022-12-14 09:16:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 39 [2022-12-14 09:16:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:36,643 INFO L225 Difference]: With dead ends: 227 [2022-12-14 09:16:36,643 INFO L226 Difference]: Without dead ends: 119 [2022-12-14 09:16:36,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:36,649 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 15 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:36,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 239 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-14 09:16:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-12-14 09:16:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4827586206896552) internal successors, (172), 116 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 172 transitions. [2022-12-14 09:16:36,686 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 172 transitions. Word has length 39 [2022-12-14 09:16:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:36,687 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 172 transitions. [2022-12-14 09:16:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 172 transitions. [2022-12-14 09:16:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 09:16:36,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:36,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:16:36,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -836000812, now seen corresponding path program 1 times [2022-12-14 09:16:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:36,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620629873] [2022-12-14 09:16:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:36,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:36,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620629873] [2022-12-14 09:16:36,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620629873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:36,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:36,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:16:36,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881915719] [2022-12-14 09:16:36,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:36,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:36,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:36,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:36,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:36,764 INFO L87 Difference]: Start difference. First operand 117 states and 172 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:36,879 INFO L93 Difference]: Finished difference Result 253 states and 378 transitions. [2022-12-14 09:16:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2022-12-14 09:16:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:36,881 INFO L225 Difference]: With dead ends: 253 [2022-12-14 09:16:36,881 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 09:16:36,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:36,883 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:36,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 189 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 09:16:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-12-14 09:16:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.4370370370370371) internal successors, (194), 135 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2022-12-14 09:16:36,894 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 53 [2022-12-14 09:16:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:36,895 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2022-12-14 09:16:36,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2022-12-14 09:16:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 09:16:36,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:36,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 09:16:36,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:16:36,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:36,898 INFO L85 PathProgramCache]: Analyzing trace with hash 735763446, now seen corresponding path program 1 times [2022-12-14 09:16:36,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:36,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307989288] [2022-12-14 09:16:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:36,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:16:37,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:37,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307989288] [2022-12-14 09:16:37,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307989288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:37,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:37,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:16:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951906880] [2022-12-14 09:16:37,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:37,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:16:37,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:16:37,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:16:37,017 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:37,181 INFO L93 Difference]: Finished difference Result 314 states and 465 transitions. [2022-12-14 09:16:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:16:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-12-14 09:16:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:37,183 INFO L225 Difference]: With dead ends: 314 [2022-12-14 09:16:37,183 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 09:16:37,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:16:37,185 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 13 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:37,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 243 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 09:16:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2022-12-14 09:16:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.3641618497109826) internal successors, (236), 173 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-12-14 09:16:37,196 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 70 [2022-12-14 09:16:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:37,197 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-12-14 09:16:37,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-12-14 09:16:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 09:16:37,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:37,199 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-12-14 09:16:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:16:37,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1739467776, now seen corresponding path program 1 times [2022-12-14 09:16:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:37,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073578506] [2022-12-14 09:16:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 09:16:37,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073578506] [2022-12-14 09:16:37,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073578506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:37,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:37,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:16:37,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660925789] [2022-12-14 09:16:37,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:37,277 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:37,377 INFO L93 Difference]: Finished difference Result 379 states and 528 transitions. [2022-12-14 09:16:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 89 [2022-12-14 09:16:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:37,379 INFO L225 Difference]: With dead ends: 379 [2022-12-14 09:16:37,379 INFO L226 Difference]: Without dead ends: 207 [2022-12-14 09:16:37,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:37,381 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 22 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:37,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 200 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-14 09:16:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2022-12-14 09:16:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.336734693877551) internal successors, (262), 196 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 262 transitions. [2022-12-14 09:16:37,393 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 262 transitions. Word has length 89 [2022-12-14 09:16:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:37,393 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 262 transitions. [2022-12-14 09:16:37,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 262 transitions. [2022-12-14 09:16:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 09:16:37,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:37,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:37,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:16:37,396 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash -245002917, now seen corresponding path program 1 times [2022-12-14 09:16:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856985126] [2022-12-14 09:16:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:37,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:37,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:37,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856985126] [2022-12-14 09:16:37,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856985126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:37,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009538820] [2022-12-14 09:16:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:37,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:37,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:37,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:37,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:16:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:37,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:16:37,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:37,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 09:16:37,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009538820] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:37,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:16:37,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 6 [2022-12-14 09:16:37,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780185365] [2022-12-14 09:16:37,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:37,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:37,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:16:37,969 INFO L87 Difference]: Start difference. First operand 197 states and 262 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:38,009 INFO L93 Difference]: Finished difference Result 391 states and 521 transitions. [2022-12-14 09:16:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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 108 [2022-12-14 09:16:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:38,012 INFO L225 Difference]: With dead ends: 391 [2022-12-14 09:16:38,012 INFO L226 Difference]: Without dead ends: 389 [2022-12-14 09:16:38,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:16:38,013 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 99 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:38,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 272 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:16:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-12-14 09:16:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 388. [2022-12-14 09:16:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.3385012919896642) internal successors, (518), 387 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 518 transitions. [2022-12-14 09:16:38,030 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 518 transitions. Word has length 108 [2022-12-14 09:16:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:38,031 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 518 transitions. [2022-12-14 09:16:38,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 518 transitions. [2022-12-14 09:16:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 09:16:38,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:38,035 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:38,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:16:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:38,236 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1820991148, now seen corresponding path program 1 times [2022-12-14 09:16:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411182197] [2022-12-14 09:16:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:38,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:16:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598226602] [2022-12-14 09:16:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:38,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:38,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:38,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:16:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:16:38,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 09:16:38,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:16:38,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:38,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411182197] [2022-12-14 09:16:38,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:16:38,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598226602] [2022-12-14 09:16:38,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598226602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:38,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:38,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:16:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736448896] [2022-12-14 09:16:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:38,380 INFO L87 Difference]: Start difference. First operand 388 states and 518 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:38,514 INFO L93 Difference]: Finished difference Result 872 states and 1208 transitions. [2022-12-14 09:16:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 142 [2022-12-14 09:16:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:38,517 INFO L225 Difference]: With dead ends: 872 [2022-12-14 09:16:38,517 INFO L226 Difference]: Without dead ends: 486 [2022-12-14 09:16:38,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:38,519 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 28 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:38,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 187 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-12-14 09:16:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 466. [2022-12-14 09:16:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.3075268817204302) internal successors, (608), 465 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 608 transitions. [2022-12-14 09:16:38,533 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 608 transitions. Word has length 142 [2022-12-14 09:16:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:38,533 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 608 transitions. [2022-12-14 09:16:38,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 608 transitions. [2022-12-14 09:16:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 09:16:38,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:38,534 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:38,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:16:38,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:16:38,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash -800930616, now seen corresponding path program 1 times [2022-12-14 09:16:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:38,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860074397] [2022-12-14 09:16:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:38,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:16:38,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241603997] [2022-12-14 09:16:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:38,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:38,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:38,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:16:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:16:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 09:16:38,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:16:38,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:38,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860074397] [2022-12-14 09:16:38,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:16:38,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241603997] [2022-12-14 09:16:38,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241603997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:38,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:38,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:16:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532632470] [2022-12-14 09:16:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:38,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:38,964 INFO L87 Difference]: Start difference. First operand 466 states and 608 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:39,094 INFO L93 Difference]: Finished difference Result 1042 states and 1412 transitions. [2022-12-14 09:16:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 147 [2022-12-14 09:16:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:39,095 INFO L225 Difference]: With dead ends: 1042 [2022-12-14 09:16:39,096 INFO L226 Difference]: Without dead ends: 554 [2022-12-14 09:16:39,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:39,097 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 66 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:39,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 154 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-12-14 09:16:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 538. [2022-12-14 09:16:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.3370577281191807) internal successors, (718), 537 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 718 transitions. [2022-12-14 09:16:39,109 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 718 transitions. Word has length 147 [2022-12-14 09:16:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:39,109 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 718 transitions. [2022-12-14 09:16:39,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 718 transitions. [2022-12-14 09:16:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 09:16:39,111 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:39,111 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:39,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:16:39,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 09:16:39,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash 186140274, now seen corresponding path program 1 times [2022-12-14 09:16:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:39,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120680657] [2022-12-14 09:16:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:39,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:39,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120680657] [2022-12-14 09:16:39,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 09:16:39,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462793772] [2022-12-14 09:16:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:39,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:39,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:39,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:39,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:16:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:39,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:16:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-12-14 09:16:39,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:16:39,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462793772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:39,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:39,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:16:39,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010550903] [2022-12-14 09:16:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:39,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:39,597 INFO L87 Difference]: Start difference. First operand 538 states and 718 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:39,723 INFO L93 Difference]: Finished difference Result 1162 states and 1594 transitions. [2022-12-14 09:16:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 169 [2022-12-14 09:16:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:39,725 INFO L225 Difference]: With dead ends: 1162 [2022-12-14 09:16:39,725 INFO L226 Difference]: Without dead ends: 602 [2022-12-14 09:16:39,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:39,727 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 69 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:39,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 144 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-12-14 09:16:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 592. [2022-12-14 09:16:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 1.373942470389171) internal successors, (812), 591 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 812 transitions. [2022-12-14 09:16:39,738 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 812 transitions. Word has length 169 [2022-12-14 09:16:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:39,738 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 812 transitions. [2022-12-14 09:16:39,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 812 transitions. [2022-12-14 09:16:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 09:16:39,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:39,740 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:39,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:16:39,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:39,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1636497485, now seen corresponding path program 1 times [2022-12-14 09:16:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:39,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294625159] [2022-12-14 09:16:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:39,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:39,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294625159] [2022-12-14 09:16:39,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 09:16:39,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142190041] [2022-12-14 09:16:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:39,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:39,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:39,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:39,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:16:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:16:40,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 09:16:40,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:16:40,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142190041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:40,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:40,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:16:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643247304] [2022-12-14 09:16:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:40,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:40,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:40,083 INFO L87 Difference]: Start difference. First operand 592 states and 812 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:40,226 INFO L93 Difference]: Finished difference Result 1324 states and 1872 transitions. [2022-12-14 09:16:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 174 [2022-12-14 09:16:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:40,229 INFO L225 Difference]: With dead ends: 1324 [2022-12-14 09:16:40,229 INFO L226 Difference]: Without dead ends: 726 [2022-12-14 09:16:40,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:40,231 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 56 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:40,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 169 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-12-14 09:16:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 700. [2022-12-14 09:16:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.3104434907010014) internal successors, (916), 699 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 916 transitions. [2022-12-14 09:16:40,258 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 916 transitions. Word has length 174 [2022-12-14 09:16:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:40,259 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 916 transitions. [2022-12-14 09:16:40,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 916 transitions. [2022-12-14 09:16:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 09:16:40,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:40,262 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 09:16:40,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:16:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:40,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1446865020, now seen corresponding path program 1 times [2022-12-14 09:16:40,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:40,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016444513] [2022-12-14 09:16:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:40,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016444513] [2022-12-14 09:16:40,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 09:16:40,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659908539] [2022-12-14 09:16:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:40,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:40,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:40,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:40,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:16:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:16:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-14 09:16:40,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:16:40,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659908539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:40,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:40,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:16:40,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226743960] [2022-12-14 09:16:40,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:40,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:16:40,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:40,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:16:40,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:40,705 INFO L87 Difference]: Start difference. First operand 700 states and 916 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:40,845 INFO L93 Difference]: Finished difference Result 1461 states and 1940 transitions. [2022-12-14 09:16:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:16:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 178 [2022-12-14 09:16:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:40,848 INFO L225 Difference]: With dead ends: 1461 [2022-12-14 09:16:40,848 INFO L226 Difference]: Without dead ends: 761 [2022-12-14 09:16:40,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:16:40,850 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 112 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:40,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 103 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-12-14 09:16:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 751. [2022-12-14 09:16:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.3293333333333333) internal successors, (997), 750 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 997 transitions. [2022-12-14 09:16:40,866 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 997 transitions. Word has length 178 [2022-12-14 09:16:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:40,866 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 997 transitions. [2022-12-14 09:16:40,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 997 transitions. [2022-12-14 09:16:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-12-14 09:16:40,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:40,868 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:40,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:16:41,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:16:41,069 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1250272793, now seen corresponding path program 1 times [2022-12-14 09:16:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:41,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312910386] [2022-12-14 09:16:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:41,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:41,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:16:41,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413771980] [2022-12-14 09:16:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:41,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:41,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:41,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:41,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:16:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:16:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-12-14 09:16:41,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:16:41,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312910386] [2022-12-14 09:16:41,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:16:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413771980] [2022-12-14 09:16:41,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413771980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:41,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:41,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:16:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284433285] [2022-12-14 09:16:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:16:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:16:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:16:41,281 INFO L87 Difference]: Start difference. First operand 751 states and 997 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:41,471 INFO L93 Difference]: Finished difference Result 1575 states and 2113 transitions. [2022-12-14 09:16:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:16:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 200 [2022-12-14 09:16:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:41,474 INFO L225 Difference]: With dead ends: 1575 [2022-12-14 09:16:41,474 INFO L226 Difference]: Without dead ends: 766 [2022-12-14 09:16:41,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:16:41,476 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 38 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:41,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 264 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:16:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-12-14 09:16:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 743. [2022-12-14 09:16:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.3018867924528301) internal successors, (966), 742 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 966 transitions. [2022-12-14 09:16:41,498 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 966 transitions. Word has length 200 [2022-12-14 09:16:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:41,499 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 966 transitions. [2022-12-14 09:16:41,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 966 transitions. [2022-12-14 09:16:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-12-14 09:16:41,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:41,502 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:41,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:16:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:16:41,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash -20273858, now seen corresponding path program 1 times [2022-12-14 09:16:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683116371] [2022-12-14 09:16:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:41,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:41,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:16:41,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972837310] [2022-12-14 09:16:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:41,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:41,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:41,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:41,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_feff31bc-ea5f-4fa4-b7db-6f0570c9a8d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:16:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:16:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-12-14 09:16:41,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-12-14 09:16:41,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:41,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683116371] [2022-12-14 09:16:41,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:16:41,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972837310] [2022-12-14 09:16:41,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972837310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:16:41,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1221118045] [2022-12-14 09:16:41,978 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 09:16:41,978 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:16:41,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:16:41,987 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:16:41,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs