./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3815bc174681e4b15285bf80b6019df1e4400d301be17580b1900d66fa790fc8 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:23:11,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:23:11,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:23:11,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:23:11,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:23:12,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:23:12,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:23:12,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:23:12,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:23:12,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:23:12,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:23:12,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:23:12,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:23:12,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:23:12,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:23:12,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:23:12,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:23:12,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:23:12,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:23:12,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:23:12,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:23:12,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:23:12,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:23:12,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:23:12,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:23:12,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:23:12,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:23:12,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:23:12,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:23:12,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:23:12,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:23:12,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:23:12,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:23:12,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:23:12,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:23:12,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:23:12,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:23:12,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:23:12,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:23:12,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:23:12,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:23:12,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:23:12,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:23:12,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:23:12,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:23:12,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:23:12,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:23:12,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:23:12,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:23:12,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:23:12,115 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:23:12,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:23:12,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:23:12,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:23:12,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:23:12,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:23:12,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:23:12,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:23:12,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:23:12,117 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:23:12,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:23:12,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:23:12,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:23:12,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:23:12,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:23:12,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:23:12,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:23:12,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:23:12,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:23:12,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:23:12,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:23:12,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:23:12,119 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:23:12,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:23:12,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:23:12,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:23:12,120 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3815bc174681e4b15285bf80b6019df1e4400d301be17580b1900d66fa790fc8 [2021-12-15 11:23:12,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:23:12,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:23:12,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:23:12,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:23:12,525 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:23:12,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c [2021-12-15 11:23:12,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/221c3fbf0/6421091d38c94969981d78d123b57080/FLAGd8c6addbb [2021-12-15 11:23:13,103 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:23:13,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c [2021-12-15 11:23:13,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/221c3fbf0/6421091d38c94969981d78d123b57080/FLAGd8c6addbb [2021-12-15 11:23:13,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/221c3fbf0/6421091d38c94969981d78d123b57080 [2021-12-15 11:23:13,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:23:13,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:23:13,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:23:13,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:23:13,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:23:13,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:23:13" (1/1) ... [2021-12-15 11:23:13,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d61ed13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:13, skipping insertion in model container [2021-12-15 11:23:13,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:23:13" (1/1) ... [2021-12-15 11:23:13,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:23:13,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:23:13,840 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c[1509,1522] [2021-12-15 11:23:14,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:23:14,129 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:23:14,153 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c[1509,1522] [2021-12-15 11:23:14,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:23:14,336 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:23:14,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14 WrapperNode [2021-12-15 11:23:14,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:23:14,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:23:14,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:23:14,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:23:14,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,518 INFO L137 Inliner]: procedures = 55, calls = 2046, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 3968 [2021-12-15 11:23:14,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:23:14,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:23:14,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:23:14,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:23:14,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:23:14,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:23:14,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:23:14,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:23:14,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (1/1) ... [2021-12-15 11:23:14,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:23:14,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:23:14,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:23:14,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:23:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:23:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-12-15 11:23:14,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-12-15 11:23:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2021-12-15 11:23:14,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2021-12-15 11:23:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 11:23:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-12-15 11:23:14,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-12-15 11:23:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-12-15 11:23:14,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-12-15 11:23:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2021-12-15 11:23:14,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2021-12-15 11:23:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 11:23:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-12-15 11:23:14,726 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-12-15 11:23:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2021-12-15 11:23:14,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2021-12-15 11:23:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-15 11:23:14,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-15 11:23:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-15 11:23:14,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-15 11:23:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 11:23:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2021-12-15 11:23:14,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2021-12-15 11:23:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-15 11:23:14,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-15 11:23:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 11:23:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2021-12-15 11:23:14,727 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2021-12-15 11:23:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-15 11:23:14,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-15 11:23:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:23:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:23:14,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:23:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2021-12-15 11:23:14,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2021-12-15 11:23:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-12-15 11:23:14,728 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-12-15 11:23:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2021-12-15 11:23:14,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2021-12-15 11:23:15,027 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:23:15,065 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:23:21,333 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:23:21,350 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:23:21,350 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:23:21,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:23:21 BoogieIcfgContainer [2021-12-15 11:23:21,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:23:21,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:23:21,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:23:21,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:23:21,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:23:13" (1/3) ... [2021-12-15 11:23:21,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef2bc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:23:21, skipping insertion in model container [2021-12-15 11:23:21,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:14" (2/3) ... [2021-12-15 11:23:21,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef2bc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:23:21, skipping insertion in model container [2021-12-15 11:23:21,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:23:21" (3/3) ... [2021-12-15 11:23:21,360 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_nxt.1.M4-2.c [2021-12-15 11:23:21,364 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:23:21,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:23:21,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:23:21,425 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:23:21,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:23:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 1603 states, 972 states have (on average 1.228395061728395) internal successors, (1194), 977 states have internal predecessors, (1194), 613 states have call successors, (613), 16 states have call predecessors, (613), 16 states have return successors, (613), 611 states have call predecessors, (613), 613 states have call successors, (613) [2021-12-15 11:23:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8483 [2021-12-15 11:23:21,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:23:21,986 INFO L514 BasicCegarLoop]: trace histogram [964, 964, 964, 108, 108, 108, 108, 108, 108, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:23:21,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:23:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:23:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash -767459317, now seen corresponding path program 1 times [2021-12-15 11:23:21,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:23:21,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687293278] [2021-12-15 11:23:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:23:21,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:23:22,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:23:22,050 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-12-15 11:23:22,055 INFO L158 Benchmark]: Toolchain (without parser) took 8436.40ms. Allocated memory was 113.2MB in the beginning and 216.0MB in the end (delta: 102.8MB). Free memory was 82.7MB in the beginning and 130.1MB in the end (delta: -47.4MB). Peak memory consumption was 159.4MB. Max. memory is 16.1GB. [2021-12-15 11:23:22,055 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory was 41.8MB in the beginning and 41.8MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:23:22,055 INFO L158 Benchmark]: CACSL2BoogieTranslator took 716.12ms. Allocated memory is still 113.2MB. Free memory was 82.3MB in the beginning and 74.7MB in the end (delta: 7.7MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. [2021-12-15 11:23:22,056 INFO L158 Benchmark]: Boogie Procedure Inliner took 180.67ms. Allocated memory is still 113.2MB. Free memory was 74.7MB in the beginning and 51.0MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-15 11:23:22,056 INFO L158 Benchmark]: Boogie Preprocessor took 148.51ms. Allocated memory is still 113.2MB. Free memory was 51.0MB in the beginning and 58.8MB in the end (delta: -7.8MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2021-12-15 11:23:22,057 INFO L158 Benchmark]: RCFGBuilder took 6685.41ms. Allocated memory was 113.2MB in the beginning and 216.0MB in the end (delta: 102.8MB). Free memory was 58.8MB in the beginning and 128.7MB in the end (delta: -69.9MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. [2021-12-15 11:23:22,057 INFO L158 Benchmark]: TraceAbstraction took 698.63ms. Allocated memory is still 216.0MB. Free memory was 127.7MB in the beginning and 130.1MB in the end (delta: -2.4MB). Peak memory consumption was 102.1MB. Max. memory is 16.1GB. [2021-12-15 11:23:22,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory was 41.8MB in the beginning and 41.8MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 716.12ms. Allocated memory is still 113.2MB. Free memory was 82.3MB in the beginning and 74.7MB in the end (delta: 7.7MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 180.67ms. Allocated memory is still 113.2MB. Free memory was 74.7MB in the beginning and 51.0MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 148.51ms. Allocated memory is still 113.2MB. Free memory was 51.0MB in the beginning and 58.8MB in the end (delta: -7.8MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. * RCFGBuilder took 6685.41ms. Allocated memory was 113.2MB in the beginning and 216.0MB in the end (delta: 102.8MB). Free memory was 58.8MB in the beginning and 128.7MB in the end (delta: -69.9MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. * TraceAbstraction took 698.63ms. Allocated memory is still 216.0MB. Free memory was 127.7MB in the beginning and 130.1MB in the end (delta: -2.4MB). Peak memory consumption was 102.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 11:23:22,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3815bc174681e4b15285bf80b6019df1e4400d301be17580b1900d66fa790fc8 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:23:23,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:23:23,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:23:23,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:23:23,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:23:23,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:23:23,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:23:23,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:23:23,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:23:23,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:23:23,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:23:23,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:23:23,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:23:23,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:23:23,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:23:23,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:23:23,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:23:23,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:23:23,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:23:23,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:23:23,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:23:23,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:23:23,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:23:23,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:23:23,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:23:23,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:23:23,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:23:23,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:23:23,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:23:23,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:23:23,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:23:23,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:23:23,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:23:23,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:23:23,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:23:23,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:23:23,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:23:23,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:23:23,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:23:23,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:23:23,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:23:23,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 11:23:24,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:23:24,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:23:24,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:23:24,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:23:24,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:23:24,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:23:24,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:23:24,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:23:24,020 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:23:24,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:23:24,020 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:23:24,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:23:24,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:23:24,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:23:24,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:23:24,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:23:24,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 11:23:24,021 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 11:23:24,021 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 11:23:24,021 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:23:24,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:23:24,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:23:24,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:23:24,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:23:24,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:23:24,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:23:24,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:23:24,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:23:24,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:23:24,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:23:24,023 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 11:23:24,023 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 11:23:24,024 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:23:24,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:23:24,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:23:24,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:23:24,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 11:23:24,024 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3815bc174681e4b15285bf80b6019df1e4400d301be17580b1900d66fa790fc8 [2021-12-15 11:23:24,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:23:24,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:23:24,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:23:24,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:23:24,293 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:23:24,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c [2021-12-15 11:23:24,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf1886d/786b32c821684d338f189e1a1d4d656c/FLAGf73a56d92 [2021-12-15 11:23:24,868 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:23:24,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c [2021-12-15 11:23:24,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf1886d/786b32c821684d338f189e1a1d4d656c/FLAGf73a56d92 [2021-12-15 11:23:25,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf1886d/786b32c821684d338f189e1a1d4d656c [2021-12-15 11:23:25,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:23:25,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:23:25,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:23:25,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:23:25,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:23:25,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:23:25" (1/1) ... [2021-12-15 11:23:25,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ad97c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:25, skipping insertion in model container [2021-12-15 11:23:25,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:23:25" (1/1) ... [2021-12-15 11:23:25,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:23:25,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:23:25,506 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c[1509,1522] [2021-12-15 11:23:25,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:23:25,825 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:23:25,834 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M4-2.c[1509,1522] [2021-12-15 11:23:26,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:23:26,018 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:23:26,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26 WrapperNode [2021-12-15 11:23:26,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:23:26,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:23:26,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:23:26,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:23:26,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,212 INFO L137 Inliner]: procedures = 58, calls = 2046, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 3965 [2021-12-15 11:23:26,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:23:26,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:23:26,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:23:26,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:23:26,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:23:26,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:23:26,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:23:26,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:23:26,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (1/1) ... [2021-12-15 11:23:26,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:23:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:23:26,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:23:26,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:23:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:23:26,442 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-12-15 11:23:26,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-12-15 11:23:26,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-15 11:23:26,442 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2021-12-15 11:23:26,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2021-12-15 11:23:26,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 11:23:26,443 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-12-15 11:23:26,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-12-15 11:23:26,443 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-12-15 11:23:26,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-12-15 11:23:26,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-15 11:23:26,443 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2021-12-15 11:23:26,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2021-12-15 11:23:26,443 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-12-15 11:23:26,443 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-12-15 11:23:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2021-12-15 11:23:26,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2021-12-15 11:23:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-15 11:23:26,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-15 11:23:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-15 11:23:26,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-15 11:23:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-15 11:23:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 11:23:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 11:23:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2021-12-15 11:23:26,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2021-12-15 11:23:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-15 11:23:26,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-15 11:23:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 11:23:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2021-12-15 11:23:26,446 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2021-12-15 11:23:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-15 11:23:26,446 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-15 11:23:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:23:26,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:23:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2021-12-15 11:23:26,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2021-12-15 11:23:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-12-15 11:23:26,447 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-12-15 11:23:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2021-12-15 11:23:26,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2021-12-15 11:23:26,834 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:23:26,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:23:37,724 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:23:37,750 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:23:37,750 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:23:37,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:23:37 BoogieIcfgContainer [2021-12-15 11:23:37,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:23:37,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:23:37,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:23:37,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:23:37,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:23:25" (1/3) ... [2021-12-15 11:23:37,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7937bffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:23:37, skipping insertion in model container [2021-12-15 11:23:37,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:26" (2/3) ... [2021-12-15 11:23:37,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7937bffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:23:37, skipping insertion in model container [2021-12-15 11:23:37,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:23:37" (3/3) ... [2021-12-15 11:23:37,763 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_nxt.1.M4-2.c [2021-12-15 11:23:37,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:23:37,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:23:37,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:23:37,840 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:23:37,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:23:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 1603 states, 972 states have (on average 1.228395061728395) internal successors, (1194), 977 states have internal predecessors, (1194), 613 states have call successors, (613), 16 states have call predecessors, (613), 16 states have return successors, (613), 611 states have call predecessors, (613), 613 states have call successors, (613) [2021-12-15 11:23:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8483 [2021-12-15 11:23:38,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:23:38,387 INFO L514 BasicCegarLoop]: trace histogram [964, 964, 964, 108, 108, 108, 108, 108, 108, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:23:38,388 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:23:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:23:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1369427147, now seen corresponding path program 1 times [2021-12-15 11:23:38,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:23:38,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845447540] [2021-12-15 11:23:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:23:38,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:23:38,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:23:38,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:23:38,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 11:23:38,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 11:23:38,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:23:38,819 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-12-15 11:23:38,825 INFO L158 Benchmark]: Toolchain (without parser) took 13484.12ms. Allocated memory was 67.1MB in the beginning and 197.1MB in the end (delta: 130.0MB). Free memory was 46.5MB in the beginning and 128.5MB in the end (delta: -82.0MB). Peak memory consumption was 155.8MB. Max. memory is 16.1GB. [2021-12-15 11:23:38,825 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory is still 49.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:23:38,826 INFO L158 Benchmark]: CACSL2BoogieTranslator took 676.30ms. Allocated memory was 67.1MB in the beginning and 96.5MB in the end (delta: 29.4MB). Free memory was 46.4MB in the beginning and 51.5MB in the end (delta: -5.1MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2021-12-15 11:23:38,826 INFO L158 Benchmark]: Boogie Procedure Inliner took 193.44ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 18.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-15 11:23:38,826 INFO L158 Benchmark]: Boogie Preprocessor took 166.10ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 45.7MB in the end (delta: 5.8MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2021-12-15 11:23:38,827 INFO L158 Benchmark]: RCFGBuilder took 11375.19ms. Allocated memory was 96.5MB in the beginning and 197.1MB in the end (delta: 100.7MB). Free memory was 45.7MB in the beginning and 131.2MB in the end (delta: -85.5MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. [2021-12-15 11:23:38,827 INFO L158 Benchmark]: TraceAbstraction took 1066.55ms. Allocated memory is still 197.1MB. Free memory was 130.1MB in the beginning and 128.5MB in the end (delta: 1.6MB). Peak memory consumption was 108.6MB. Max. memory is 16.1GB. [2021-12-15 11:23:38,835 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory is still 49.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 676.30ms. Allocated memory was 67.1MB in the beginning and 96.5MB in the end (delta: 29.4MB). Free memory was 46.4MB in the beginning and 51.5MB in the end (delta: -5.1MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 193.44ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 18.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 166.10ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 45.7MB in the end (delta: 5.8MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. * RCFGBuilder took 11375.19ms. Allocated memory was 96.5MB in the beginning and 197.1MB in the end (delta: 100.7MB). Free memory was 45.7MB in the beginning and 131.2MB in the end (delta: -85.5MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1066.55ms. Allocated memory is still 197.1MB. Free memory was 130.1MB in the beginning and 128.5MB in the end (delta: 1.6MB). Peak memory consumption was 108.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 11:23:39,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable