./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/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_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:18:42,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:18:42,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:18:42,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:18:42,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:18:42,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:18:42,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:18:42,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:18:42,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:18:42,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:18:42,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:18:42,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:18:42,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:18:42,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:18:42,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:18:42,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:18:42,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:18:42,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:18:42,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:18:42,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:18:42,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:18:42,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:18:42,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:18:42,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:18:42,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:18:42,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:18:42,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:18:42,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:18:42,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:18:42,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:18:42,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:18:42,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:18:42,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:18:42,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:18:42,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:18:42,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:18:42,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:18:42,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:18:42,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:18:42,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:18:42,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:18:42,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 11:18:42,313 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:18:42,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:18:42,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:18:42,314 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:18:42,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:18:42,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:18:42,315 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:18:42,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:18:42,315 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:18:42,315 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:18:42,315 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:18:42,315 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:18:42,316 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:18:42,316 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:18:42,316 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:18:42,316 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:18:42,316 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:18:42,316 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:18:42,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:18:42,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:18:42,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:18:42,318 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:18:42,318 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:18:42,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:18:42,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:18:42,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:18:42,318 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:18:42,319 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:18:42,319 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:18:42,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:18:42,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:18:42,319 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:18:42,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:18:42,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:18:42,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:18:42,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:18:42,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:18:42,320 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:18:42,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:18:42,321 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:18:42,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:18:42,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:18:42,321 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_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2022-12-14 11:18:42,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:18:42,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:18:42,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:18:42,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:18:42,551 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:18:42,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2022-12-14 11:18:45,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:18:45,425 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:18:45,425 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2022-12-14 11:18:45,439 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/data/63b71f67e/5947e854ae034764a328c108da91cad7/FLAG724b5adda [2022-12-14 11:18:45,453 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/data/63b71f67e/5947e854ae034764a328c108da91cad7 [2022-12-14 11:18:45,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:18:45,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:18:45,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:18:45,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:18:45,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:18:45,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:18:45" (1/1) ... [2022-12-14 11:18:45,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6f5f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:45, skipping insertion in model container [2022-12-14 11:18:45,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:18:45" (1/1) ... [2022-12-14 11:18:45,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:18:45,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:18:45,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:18:45,913 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:18:45,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:18:46,028 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:18:46,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46 WrapperNode [2022-12-14 11:18:46,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:18:46,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:18:46,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:18:46,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:18:46,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,077 INFO L138 Inliner]: procedures = 370, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 154 [2022-12-14 11:18:46,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:18:46,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:18:46,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:18:46,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:18:46,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,106 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:18:46,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:18:46,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:18:46,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:18:46,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (1/1) ... [2022-12-14 11:18:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:18:46,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:18:46,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:18:46,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:18:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:18:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-14 11:18:46,169 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-14 11:18:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:18:46,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:18:46,170 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 11:18:46,277 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:18:46,279 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:18:46,651 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:18:46,658 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:18:46,658 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:18:46,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:18:46 BoogieIcfgContainer [2022-12-14 11:18:46,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:18:46,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:18:46,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:18:46,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:18:46,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:18:45" (1/3) ... [2022-12-14 11:18:46,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdf185f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:18:46, skipping insertion in model container [2022-12-14 11:18:46,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:18:46" (2/3) ... [2022-12-14 11:18:46,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdf185f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:18:46, skipping insertion in model container [2022-12-14 11:18:46,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:18:46" (3/3) ... [2022-12-14 11:18:46,666 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2022-12-14 11:18:46,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:18:46,680 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-12-14 11:18:46,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 11:18:46,747 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 11:18:46,771 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:18:46,782 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 259 transitions, 523 flow [2022-12-14 11:18:46,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 259 transitions, 523 flow [2022-12-14 11:18:46,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 259 transitions, 523 flow [2022-12-14 11:18:46,841 INFO L130 PetriNetUnfolder]: 5/258 cut-off events. [2022-12-14 11:18:46,841 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 11:18:46,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 258 events. 5/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 402 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-12-14 11:18:46,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2022-12-14 11:19:31,533 WARN L233 SmtUtils]: Spent 8.88s on a formula simplification. DAG size of input: 197 DAG size of output: 187 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:19:40,421 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 197 DAG size of output: 187 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:19:54,850 WARN L233 SmtUtils]: Spent 9.34s on a formula simplification. DAG size of input: 211 DAG size of output: 205 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:20:05,702 WARN L233 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 211 DAG size of output: 205 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:20:53,075 WARN L233 SmtUtils]: Spent 17.64s on a formula simplification. DAG size of input: 279 DAG size of output: 264 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:21:02,327 WARN L233 SmtUtils]: Spent 9.24s on a formula simplification that was a NOOP. DAG size: 244 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:21:26,274 WARN L233 SmtUtils]: Spent 23.94s on a formula simplification. DAG size of input: 288 DAG size of output: 273 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:21:37,664 WARN L233 SmtUtils]: Spent 11.38s on a formula simplification that was a NOOP. DAG size: 253 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 11:21:48,790 INFO L134 LiptonReduction]: Checked pairs total: 12044 [2022-12-14 11:21:48,790 INFO L136 LiptonReduction]: Total number of compositions: 381 [2022-12-14 11:21:48,796 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 84 places, 81 transitions, 167 flow [2022-12-14 11:21:48,820 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 391 states, 248 states have (on average 2.8306451612903225) internal successors, (702), 390 states have internal predecessors, (702), 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 11:21:48,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:21:48,840 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2ba15977, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:21:48,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2022-12-14 11:21:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 391 states, 248 states have (on average 2.8306451612903225) internal successors, (702), 390 states have internal predecessors, (702), 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 11:21:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:21:48,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:21:48,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:21:48,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:21:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:21:48,854 INFO L85 PathProgramCache]: Analyzing trace with hash 29945, now seen corresponding path program 1 times [2022-12-14 11:21:48,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:21:48,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483576555] [2022-12-14 11:21:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:21:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:48,986 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 11:21:48,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:21:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483576555] [2022-12-14 11:21:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483576555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:21:48,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:21:48,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:21:48,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453782444] [2022-12-14 11:21:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:21:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:21:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:21:49,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:21:49,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:21:49,009 INFO L87 Difference]: Start difference. First operand has 391 states, 248 states have (on average 2.8306451612903225) internal successors, (702), 390 states have internal predecessors, (702), 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 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 11:21:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:21:49,237 INFO L93 Difference]: Finished difference Result 328 states and 609 transitions. [2022-12-14 11:21:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:21:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 11:21:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:21:49,247 INFO L225 Difference]: With dead ends: 328 [2022-12-14 11:21:49,247 INFO L226 Difference]: Without dead ends: 328 [2022-12-14 11:21:49,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:21:49,249 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:21:49,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:21:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-14 11:21:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-12-14 11:21:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 232 states have (on average 2.625) internal successors, (609), 327 states have internal predecessors, (609), 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 11:21:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 609 transitions. [2022-12-14 11:21:49,286 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 609 transitions. Word has length 2 [2022-12-14 11:21:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:21:49,286 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 609 transitions. [2022-12-14 11:21:49,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 11:21:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 609 transitions. [2022-12-14 11:21:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:21:49,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:21:49,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:21:49,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:21:49,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:21:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:21:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash 29961, now seen corresponding path program 1 times [2022-12-14 11:21:49,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:21:49,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127230196] [2022-12-14 11:21:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:49,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:21:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:49,377 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 11:21:49,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:21:49,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127230196] [2022-12-14 11:21:49,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127230196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:21:49,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:21:49,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:21:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975607140] [2022-12-14 11:21:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:21:49,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:21:49,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:21:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:21:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:21:49,380 INFO L87 Difference]: Start difference. First operand 328 states and 609 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 11:21:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:21:49,754 INFO L93 Difference]: Finished difference Result 331 states and 612 transitions. [2022-12-14 11:21:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:21:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 11:21:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:21:49,755 INFO L225 Difference]: With dead ends: 331 [2022-12-14 11:21:49,756 INFO L226 Difference]: Without dead ends: 331 [2022-12-14 11:21:49,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:21:49,756 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:21:49,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:21:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-12-14 11:21:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2022-12-14 11:21:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 233 states have (on average 2.6266094420600856) internal successors, (612), 328 states have internal predecessors, (612), 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 11:21:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 612 transitions. [2022-12-14 11:21:49,767 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 612 transitions. Word has length 2 [2022-12-14 11:21:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:21:49,767 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 612 transitions. [2022-12-14 11:21:49,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 11:21:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 612 transitions. [2022-12-14 11:21:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:21:49,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:21:49,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:21:49,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:21:49,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:21:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:21:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2022-12-14 11:21:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:21:49,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022614939] [2022-12-14 11:21:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:21:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:49,892 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 11:21:49,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:21:49,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022614939] [2022-12-14 11:21:49,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022614939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:21:49,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:21:49,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:21:49,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403310898] [2022-12-14 11:21:49,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:21:49,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:21:49,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:21:49,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:21:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:21:49,893 INFO L87 Difference]: Start difference. First operand 329 states and 612 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 11:21:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:21:50,210 INFO L93 Difference]: Finished difference Result 329 states and 610 transitions. [2022-12-14 11:21:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:21:50,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 11:21:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:21:50,212 INFO L225 Difference]: With dead ends: 329 [2022-12-14 11:21:50,212 INFO L226 Difference]: Without dead ends: 329 [2022-12-14 11:21:50,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:21:50,213 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:21:50,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:21:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-14 11:21:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-12-14 11:21:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 328 states have internal predecessors, (610), 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 11:21:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 610 transitions. [2022-12-14 11:21:50,221 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 610 transitions. Word has length 2 [2022-12-14 11:21:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:21:50,222 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 610 transitions. [2022-12-14 11:21:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 11:21:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 610 transitions. [2022-12-14 11:21:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:21:50,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:21:50,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:21:50,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:21:50,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:21:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:21:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash 930046, now seen corresponding path program 1 times [2022-12-14 11:21:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:21:50,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012740281] [2022-12-14 11:21:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:21:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:21:50,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:21:50,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012740281] [2022-12-14 11:21:50,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012740281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:21:50,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126655806] [2022-12-14 11:21:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:50,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:21:50,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:21:50,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:21:50,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:21:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:21:50,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:21:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:21:50,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:21:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:21:50,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126655806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:21:50,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695723571] [2022-12-14 11:21:50,465 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 11:21:50,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:21:50,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-14 11:21:50,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928889513] [2022-12-14 11:21:50,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:21:50,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:21:50,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:21:50,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:21:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:21:50,467 INFO L87 Difference]: Start difference. First operand 329 states and 610 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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 11:21:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:21:51,115 INFO L93 Difference]: Finished difference Result 336 states and 619 transitions. [2022-12-14 11:21:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:21:51,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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 3 [2022-12-14 11:21:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:21:51,117 INFO L225 Difference]: With dead ends: 336 [2022-12-14 11:21:51,117 INFO L226 Difference]: Without dead ends: 336 [2022-12-14 11:21:51,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:21:51,118 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:21:51,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:21:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-12-14 11:21:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 332. [2022-12-14 11:21:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 236 states have (on average 2.6228813559322033) internal successors, (619), 331 states have internal predecessors, (619), 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 11:21:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 619 transitions. [2022-12-14 11:21:51,130 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 619 transitions. Word has length 3 [2022-12-14 11:21:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:21:51,131 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 619 transitions. [2022-12-14 11:21:51,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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 11:21:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 619 transitions. [2022-12-14 11:21:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:21:51,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:21:51,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:21:51,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:21:51,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:21:51,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:21:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:21:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash 929983, now seen corresponding path program 1 times [2022-12-14 11:21:51,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:21:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815576637] [2022-12-14 11:21:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:21:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:21:51,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:21:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815576637] [2022-12-14 11:21:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815576637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:21:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799671947] [2022-12-14 11:21:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:21:51,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:21:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:21:51,630 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:21:51,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:21:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:21:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:21:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:21:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:21:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:21:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:21:51,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 11:21:51,842 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 11:21:51,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-12-14 11:21:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:21:51,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:21:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:21:58,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799671947] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:21:58,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66197904] [2022-12-14 11:21:58,169 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 11:21:58,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:21:58,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-14 11:21:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401550166] [2022-12-14 11:21:58,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:21:58,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:21:58,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:21:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:21:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:21:58,170 INFO L87 Difference]: Start difference. First operand 332 states and 619 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 11:22:00,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:03,073 INFO L93 Difference]: Finished difference Result 333 states and 615 transitions. [2022-12-14 11:22:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:22:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 3 [2022-12-14 11:22:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:03,076 INFO L225 Difference]: With dead ends: 333 [2022-12-14 11:22:03,076 INFO L226 Difference]: Without dead ends: 333 [2022-12-14 11:22:03,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:22:03,077 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:03,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 11:22:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-12-14 11:22:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2022-12-14 11:22:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 236 states have (on average 2.6059322033898304) internal successors, (615), 331 states have internal predecessors, (615), 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 11:22:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 615 transitions. [2022-12-14 11:22:03,085 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 615 transitions. Word has length 3 [2022-12-14 11:22:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:03,085 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 615 transitions. [2022-12-14 11:22:03,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 11:22:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 615 transitions. [2022-12-14 11:22:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 11:22:03,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:03,086 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1] [2022-12-14 11:22:03,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:22:03,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:22:03,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:22:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash 28832620, now seen corresponding path program 1 times [2022-12-14 11:22:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:03,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976980202] [2022-12-14 11:22:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:22:03,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976980202] [2022-12-14 11:22:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976980202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:22:03,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:22:03,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:22:03,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410296599] [2022-12-14 11:22:03,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:22:03,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:22:03,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:03,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:22:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:22:03,497 INFO L87 Difference]: Start difference. First operand 332 states and 615 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 11:22:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:03,860 INFO L93 Difference]: Finished difference Result 335 states and 600 transitions. [2022-12-14 11:22:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:22:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 11:22:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:03,861 INFO L225 Difference]: With dead ends: 335 [2022-12-14 11:22:03,861 INFO L226 Difference]: Without dead ends: 335 [2022-12-14 11:22:03,861 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 11:22:03,862 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:03,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:22:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-12-14 11:22:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 299. [2022-12-14 11:22:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 216 states have (on average 2.5462962962962963) internal successors, (550), 298 states have internal predecessors, (550), 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 11:22:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 550 transitions. [2022-12-14 11:22:03,867 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 550 transitions. Word has length 4 [2022-12-14 11:22:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:03,867 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 550 transitions. [2022-12-14 11:22:03,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 11:22:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 550 transitions. [2022-12-14 11:22:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:22:03,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:03,868 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 11:22:03,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:22:03,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:22:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1938442825, now seen corresponding path program 2 times [2022-12-14 11:22:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:03,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115542282] [2022-12-14 11:22:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:04,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:04,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115542282] [2022-12-14 11:22:04,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115542282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:22:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669767623] [2022-12-14 11:22:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:22:04,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:22:04,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:22:04,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:22:04,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:22:05,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:22:05,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:22:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:22:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:22:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:05,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:22:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669767623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:22:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377738277] [2022-12-14 11:22:05,354 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 11:22:05,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:22:05,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-14 11:22:05,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061109777] [2022-12-14 11:22:05,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:22:05,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:22:05,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:22:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:22:05,356 INFO L87 Difference]: Start difference. First operand 299 states and 550 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 11:22:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:22:06,252 INFO L93 Difference]: Finished difference Result 310 states and 562 transitions. [2022-12-14 11:22:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:22:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 6 [2022-12-14 11:22:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:22:06,255 INFO L225 Difference]: With dead ends: 310 [2022-12-14 11:22:06,255 INFO L226 Difference]: Without dead ends: 310 [2022-12-14 11:22:06,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:22:06,256 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:22:06,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:22:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-14 11:22:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2022-12-14 11:22:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 222 states have (on average 2.5315315315315314) internal successors, (562), 304 states have internal predecessors, (562), 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 11:22:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 562 transitions. [2022-12-14 11:22:06,261 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 562 transitions. Word has length 6 [2022-12-14 11:22:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:22:06,261 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 562 transitions. [2022-12-14 11:22:06,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 11:22:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 562 transitions. [2022-12-14 11:22:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:22:06,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:22:06,261 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 11:22:06,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 11:22:06,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:22:06,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:22:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:22:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1938442762, now seen corresponding path program 2 times [2022-12-14 11:22:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:22:06,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349248647] [2022-12-14 11:22:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:22:06,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:22:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:22:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:07,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:22:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349248647] [2022-12-14 11:22:07,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349248647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:22:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669407817] [2022-12-14 11:22:07,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:22:07,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:22:07,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:22:07,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:22:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:22:08,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:22:08,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:22:08,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 11:22:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:22:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:08,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:08,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:08,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 11:22:08,951 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 11:22:08,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-12-14 11:22:09,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 11:22:09,107 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 11:22:09,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 53 treesize of output 81 [2022-12-14 11:22:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 11:22:09,282 INFO L321 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-12-14 11:22:09,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 97 [2022-12-14 11:22:09,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,404 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 11:22:09,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2022-12-14 11:22:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:22:09,502 INFO L321 Elim1Store]: treesize reduction 168, result has 23.3 percent of original size [2022-12-14 11:22:09,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 44 treesize of output 78 [2022-12-14 11:22:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:09,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:22:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:22:14,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669407817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:22:14,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435383937] [2022-12-14 11:22:14,326 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 11:22:14,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:22:14,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-14 11:22:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411072215] [2022-12-14 11:22:14,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:22:14,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:22:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:22:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:22:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:22:14,327 INFO L87 Difference]: Start difference. First operand 305 states and 562 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:22:22,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:26,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:28,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:38,799 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 101 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:22:40,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:43,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:53,887 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 59 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:22:55,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:57,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:22:58,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:23:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:23:00,814 INFO L93 Difference]: Finished difference Result 305 states and 556 transitions. [2022-12-14 11:23:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:23:00,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 6 [2022-12-14 11:23:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:23:00,816 INFO L225 Difference]: With dead ends: 305 [2022-12-14 11:23:00,816 INFO L226 Difference]: Without dead ends: 305 [2022-12-14 11:23:00,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=142, Invalid=453, Unknown=5, NotChecked=0, Total=600 [2022-12-14 11:23:00,816 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:23:00,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 467 Invalid, 3 Unknown, 0 Unchecked, 20.5s Time] [2022-12-14 11:23:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-12-14 11:23:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-12-14 11:23:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 222 states have (on average 2.5045045045045047) internal successors, (556), 304 states have internal predecessors, (556), 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 11:23:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 556 transitions. [2022-12-14 11:23:00,821 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 556 transitions. Word has length 6 [2022-12-14 11:23:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:23:00,821 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 556 transitions. [2022-12-14 11:23:00,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 11:23:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 556 transitions. [2022-12-14 11:23:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:23:00,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:23:00,822 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 11:23:00,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:23:01,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:01,024 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-12-14 11:23:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:23:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1808162345, now seen corresponding path program 3 times [2022-12-14 11:23:01,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:23:01,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860815944] [2022-12-14 11:23:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:23:01,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:23:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:23:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:23:33,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:23:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860815944] [2022-12-14 11:23:33,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860815944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:23:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595409162] [2022-12-14 11:23:33,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:23:33,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:23:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:23:33,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:23:33,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8cab5d2-3644-476d-87da-4c1fd8e4aa68/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:23:34,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:23:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:23:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 528 conjunts are in the unsatisfiable core [2022-12-14 11:23:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:23:34,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 19 [2022-12-14 11:23:34,896 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 11:23:34,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-12-14 11:23:34,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:23:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2022-12-14 11:23:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:34,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 11:23:35,008 INFO L321 Elim1Store]: treesize reduction 198, result has 26.4 percent of original size [2022-12-14 11:23:35,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 131 [2022-12-14 11:23:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,157 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:23:35,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 79 [2022-12-14 11:23:35,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 56 [2022-12-14 11:23:35,285 INFO L321 Elim1Store]: treesize reduction 313, result has 27.9 percent of original size [2022-12-14 11:23:35,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 197 [2022-12-14 11:23:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,520 INFO L321 Elim1Store]: treesize reduction 20, result has 65.5 percent of original size [2022-12-14 11:23:35,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 242 [2022-12-14 11:23:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 98 [2022-12-14 11:23:35,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 11:23:35,737 INFO L321 Elim1Store]: treesize reduction 405, result has 17.7 percent of original size [2022-12-14 11:23:35,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 101 treesize of output 150 [2022-12-14 11:23:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 39 [2022-12-14 11:23:35,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 14 [2022-12-14 11:23:35,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 40 [2022-12-14 11:23:35,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 14 [2022-12-14 11:23:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:35,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 89 [2022-12-14 11:23:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 412 treesize of output 353 [2022-12-14 11:23:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:23:36,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 343 treesize of output 292 [2022-12-14 11:23:38,176 INFO L321 Elim1Store]: treesize reduction 1708, result has 30.8 percent of original size [2022-12-14 11:23:38,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 463 treesize of output 1141 [2022-12-14 11:23:38,241 INFO L321 Elim1Store]: treesize reduction 95, result has 33.6 percent of original size [2022-12-14 11:23:38,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 384 [2022-12-14 11:32:12,198 WARN L233 SmtUtils]: Spent 7.96m on a formula simplification. DAG size of input: 280 DAG size of output: 230 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:32:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 914 treesize of output 789 [2022-12-14 11:32:12,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 779 treesize of output 617 [2022-12-14 11:32:17,498 INFO L321 Elim1Store]: treesize reduction 3986, result has 17.5 percent of original size [2022-12-14 11:32:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 26 select indices, 26 select index equivalence classes, 1 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 350 case distinctions, treesize of input 943 treesize of output 1690 [2022-12-14 11:32:17,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:17,608 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-12-14 11:32:17,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 839 treesize of output 835 [2022-12-14 11:32:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:19,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:19,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 600 treesize of output 461 [2022-12-14 11:32:19,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 451 treesize of output 272 [2022-12-14 11:32:20,268 INFO L321 Elim1Store]: treesize reduction 984, result has 25.8 percent of original size [2022-12-14 11:32:20,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 14 select indices, 14 select index equivalence classes, 60 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 162 treesize of output 423 [2022-12-14 11:32:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:21,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 833 treesize of output 642 [2022-12-14 11:32:21,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 632 treesize of output 362 [2022-12-14 11:32:22,471 INFO L321 Elim1Store]: treesize reduction 1126, result has 26.1 percent of original size [2022-12-14 11:32:22,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 16 select indices, 16 select index equivalence classes, 85 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 51 case distinctions, treesize of input 178 treesize of output 485 [2022-12-14 11:32:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:27,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:27,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1099 treesize of output 851 [2022-12-14 11:32:27,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 841 treesize of output 464 [2022-12-14 11:32:28,120 INFO L321 Elim1Store]: treesize reduction 1268, result has 26.4 percent of original size [2022-12-14 11:32:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 18 select indices, 18 select index equivalence classes, 114 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 57 case distinctions, treesize of input 194 treesize of output 547 [2022-12-14 11:32:33,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:33,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:33,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:33,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1407 treesize of output 1088 [2022-12-14 11:32:34,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 1078 treesize of output 578 [2022-12-14 11:32:34,914 INFO L321 Elim1Store]: treesize reduction 1410, result has 26.6 percent of original size [2022-12-14 11:32:34,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 20 select indices, 20 select index equivalence classes, 147 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 63 case distinctions, treesize of input 210 treesize of output 609 [2022-12-14 11:32:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:32:40,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:40,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:40,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 101 [2022-12-14 11:32:40,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:40,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2022-12-14 11:32:41,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:41,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 381 treesize of output 364 [2022-12-14 11:32:41,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:41,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 357 treesize of output 326 [2022-12-14 11:32:41,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:41,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1583 treesize of output 1398 [2022-12-14 11:32:41,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:41,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1391 treesize of output 1240 [2022-12-14 11:32:45,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:45,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 5893 treesize of output 5516 [2022-12-14 11:32:45,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:45,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 5509 treesize of output 4878 [2022-12-14 11:32:49,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:49,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25035 treesize of output 21970 [2022-12-14 11:32:49,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:49,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21963 treesize of output 19412 [2022-12-14 11:33:00,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:33:00,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100049 treesize of output 87768 [2022-12-14 11:33:00,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:33:00,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87761 treesize of output 77530 [2022-12-14 11:33:16,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:33:16,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 375511 treesize of output 350942 [2022-12-14 11:33:16,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:33:16,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 350935 treesize of output 309984 [2022-12-14 11:33:16,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:33:16,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:33:16,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:33:16,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:33:16,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28