./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/goblint-regression/28-race_reach_08-cond_racefree.i -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 --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 b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:19:53,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:19:53,149 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:19:53,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:19:53,157 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:19:53,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:19:53,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:19:53,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:19:53,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:19:53,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:19:53,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:19:53,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:19:53,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:19:53,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:19:53,193 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:19:53,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:19:53,193 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:19:53,194 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:19:53,194 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:19:53,194 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:19:53,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:19:53,195 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:19:53,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:19:53,199 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:19:53,199 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:19:53,200 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:19:53,200 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:19:53,200 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:19:53,200 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:19:53,200 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:19:53,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:19:53,201 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:19:53,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:19:53,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:19:53,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:19:53,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:19:53,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:19:53,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:19:53,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:19:53,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:19:53,202 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:19:53,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:19:53,203 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 [2024-11-16 19:19:53,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:19:53,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:19:53,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:19:53,558 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:19:53,559 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:19:53,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2024-11-16 19:19:54,898 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:19:55,138 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:19:55,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2024-11-16 19:19:55,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5dcc37c8/2cf004f03ce74acdb81e7d95e635efd6/FLAG7acb61260 [2024-11-16 19:19:55,468 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5dcc37c8/2cf004f03ce74acdb81e7d95e635efd6 [2024-11-16 19:19:55,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:19:55,472 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:19:55,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:19:55,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:19:55,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:19:55,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:19:55" (1/1) ... [2024-11-16 19:19:55,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ffe3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:55, skipping insertion in model container [2024-11-16 19:19:55,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:19:55" (1/1) ... [2024-11-16 19:19:55,537 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:19:55,876 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2024-11-16 19:19:55,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:19:55,961 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:19:56,035 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2024-11-16 19:19:56,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:19:56,101 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:19:56,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56 WrapperNode [2024-11-16 19:19:56,102 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:19:56,103 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:19:56,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:19:56,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:19:56,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,122 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,149 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 139 [2024-11-16 19:19:56,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:19:56,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:19:56,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:19:56,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:19:56,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,163 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,187 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 5, 5]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 0, 5, 5]. The 1 writes are split as follows [0, 1, 0, 0]. [2024-11-16 19:19:56,191 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,191 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,201 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,207 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,209 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:19:56,210 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:19:56,210 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:19:56,210 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:19:56,211 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (1/1) ... [2024-11-16 19:19:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:19:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:19:56,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:19:56,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:19:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 19:19:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 19:19:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:19:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:19:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:19:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-16 19:19:56,291 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 19:19:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:19:56,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:19:56,293 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:19:56,446 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:19:56,448 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:19:56,647 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L945: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-16 19:19:56,647 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L945-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-16 19:19:56,675 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:19:56,675 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:19:56,809 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:19:56,809 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:19:56,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:19:56 BoogieIcfgContainer [2024-11-16 19:19:56,809 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:19:56,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:19:56,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:19:56,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:19:56,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:19:55" (1/3) ... [2024-11-16 19:19:56,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a74c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:19:56, skipping insertion in model container [2024-11-16 19:19:56,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:56" (2/3) ... [2024-11-16 19:19:56,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a74c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:19:56, skipping insertion in model container [2024-11-16 19:19:56,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:19:56" (3/3) ... [2024-11-16 19:19:56,816 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2024-11-16 19:19:56,830 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:19:56,830 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:19:56,830 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:19:56,862 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-16 19:19:56,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 65 transitions, 137 flow [2024-11-16 19:19:56,933 INFO L124 PetriNetUnfolderBase]: 23/99 cut-off events. [2024-11-16 19:19:56,933 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:19:56,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 23/99 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 317 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2024-11-16 19:19:56,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 65 transitions, 137 flow [2024-11-16 19:19:56,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 63 transitions, 130 flow [2024-11-16 19:19:56,952 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:19:56,959 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5fbd4315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:19:56,959 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:19:56,972 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:19:56,973 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-16 19:19:56,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:19:56,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:56,974 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:19:56,974 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:56,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1650981901, now seen corresponding path program 1 times [2024-11-16 19:19:56,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230203948] [2024-11-16 19:19:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:57,212 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:19:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:57,288 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:19:57,290 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:19:57,291 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:19:57,294 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:19:57,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:19:57,295 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:19:57,297 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:19:57,298 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:19:57,317 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:19:57,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 92 transitions, 200 flow [2024-11-16 19:19:57,350 INFO L124 PetriNetUnfolderBase]: 40/170 cut-off events. [2024-11-16 19:19:57,350 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-16 19:19:57,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 170 events. 40/170 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 662 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 103. Up to 9 conditions per place. [2024-11-16 19:19:57,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 92 transitions, 200 flow [2024-11-16 19:19:57,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 92 transitions, 200 flow [2024-11-16 19:19:57,357 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:19:57,358 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5fbd4315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:19:57,359 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:19:57,371 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:19:57,372 INFO L124 PetriNetUnfolderBase]: 12/70 cut-off events. [2024-11-16 19:19:57,372 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:19:57,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:57,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:19:57,373 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:57,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:57,374 INFO L85 PathProgramCache]: Analyzing trace with hash -107351863, now seen corresponding path program 1 times [2024-11-16 19:19:57,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:57,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721229145] [2024-11-16 19:19:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:57,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:19:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:19:57,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:19:57,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721229145] [2024-11-16 19:19:57,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721229145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:19:57,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:19:57,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:19:57,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390899020] [2024-11-16 19:19:57,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:19:57,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:19:57,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:19:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:19:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:19:57,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 92 [2024-11-16 19:19:57,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 200 flow. Second operand has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 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) [2024-11-16 19:19:57,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:19:57,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 92 [2024-11-16 19:19:57,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:19:58,176 INFO L124 PetriNetUnfolderBase]: 3172/6322 cut-off events. [2024-11-16 19:19:58,176 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-16 19:19:58,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11234 conditions, 6322 events. 3172/6322 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 49326 event pairs, 2744 based on Foata normal form. 2480/8567 useless extension candidates. Maximal degree in co-relation 8233. Up to 4855 conditions per place. [2024-11-16 19:19:58,205 INFO L140 encePairwiseOnDemand]: 75/92 looper letters, 31 selfloop transitions, 0 changer transitions 12/75 dead transitions. [2024-11-16 19:19:58,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 242 flow [2024-11-16 19:19:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:19:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:19:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 129 transitions. [2024-11-16 19:19:58,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-11-16 19:19:58,217 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 200 flow. Second operand 2 states and 129 transitions. [2024-11-16 19:19:58,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 242 flow [2024-11-16 19:19:58,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:19:58,225 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 136 flow [2024-11-16 19:19:58,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-11-16 19:19:58,229 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-11-16 19:19:58,231 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 136 flow [2024-11-16 19:19:58,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 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) [2024-11-16 19:19:58,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:58,231 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-16 19:19:58,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:19:58,232 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:58,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2037590003, now seen corresponding path program 1 times [2024-11-16 19:19:58,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:58,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952469657] [2024-11-16 19:19:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:58,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:58,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:19:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:58,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:19:58,324 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:19:58,324 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:19:58,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:19:58,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:19:58,325 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-16 19:19:58,325 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:19:58,326 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:19:58,353 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-16 19:19:58,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 119 transitions, 265 flow [2024-11-16 19:19:58,373 INFO L124 PetriNetUnfolderBase]: 62/258 cut-off events. [2024-11-16 19:19:58,374 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-16 19:19:58,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 258 events. 62/258 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1080 event pairs, 1 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 181. Up to 16 conditions per place. [2024-11-16 19:19:58,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 119 transitions, 265 flow [2024-11-16 19:19:58,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 119 transitions, 265 flow [2024-11-16 19:19:58,382 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:19:58,384 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5fbd4315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:19:58,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:19:58,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:19:58,390 INFO L124 PetriNetUnfolderBase]: 12/70 cut-off events. [2024-11-16 19:19:58,390 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:19:58,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:58,390 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:19:58,391 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:58,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:58,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1550000864, now seen corresponding path program 1 times [2024-11-16 19:19:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:58,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916773106] [2024-11-16 19:19:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:19:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:19:58,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:19:58,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916773106] [2024-11-16 19:19:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916773106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:19:58,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:19:58,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:19:58,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093099093] [2024-11-16 19:19:58,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:19:58,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:19:58,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:19:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:19:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:19:58,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 119 [2024-11-16 19:19:58,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 119 transitions, 265 flow. Second operand has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 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) [2024-11-16 19:19:58,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:19:58,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 119 [2024-11-16 19:19:58,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:04,497 INFO L124 PetriNetUnfolderBase]: 48178/79502 cut-off events. [2024-11-16 19:20:04,498 INFO L125 PetriNetUnfolderBase]: For 1182/1182 co-relation queries the response was YES. [2024-11-16 19:20:04,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146079 conditions, 79502 events. 48178/79502 cut-off events. For 1182/1182 co-relation queries the response was YES. Maximal size of possible extension queue 2259. Compared 722551 event pairs, 43944 based on Foata normal form. 35552/112527 useless extension candidates. Maximal degree in co-relation 74200. Up to 65778 conditions per place. [2024-11-16 19:20:05,010 INFO L140 encePairwiseOnDemand]: 96/119 looper letters, 41 selfloop transitions, 0 changer transitions 13/96 dead transitions. [2024-11-16 19:20:05,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 317 flow [2024-11-16 19:20:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:20:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:20:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2024-11-16 19:20:05,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6974789915966386 [2024-11-16 19:20:05,013 INFO L175 Difference]: Start difference. First operand has 97 places, 119 transitions, 265 flow. Second operand 2 states and 166 transitions. [2024-11-16 19:20:05,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 317 flow [2024-11-16 19:20:05,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 317 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:05,018 INFO L231 Difference]: Finished difference. Result has 98 places, 83 transitions, 184 flow [2024-11-16 19:20:05,018 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=184, PETRI_PLACES=98, PETRI_TRANSITIONS=83} [2024-11-16 19:20:05,019 INFO L277 CegarLoopForPetriNet]: 97 programPoint places, 1 predicate places. [2024-11-16 19:20:05,019 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 83 transitions, 184 flow [2024-11-16 19:20:05,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 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) [2024-11-16 19:20:05,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:05,020 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:05,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:20:05,020 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:05,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash 925982249, now seen corresponding path program 1 times [2024-11-16 19:20:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285690639] [2024-11-16 19:20:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:05,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:05,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:05,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285690639] [2024-11-16 19:20:05,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285690639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:05,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:05,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:05,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434717295] [2024-11-16 19:20:05,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:05,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:20:05,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:05,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:20:05,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:20:05,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 119 [2024-11-16 19:20:05,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2024-11-16 19:20:05,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:05,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 119 [2024-11-16 19:20:05,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:09,096 INFO L124 PetriNetUnfolderBase]: 34582/58685 cut-off events. [2024-11-16 19:20:09,096 INFO L125 PetriNetUnfolderBase]: For 790/790 co-relation queries the response was YES. [2024-11-16 19:20:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106767 conditions, 58685 events. 34582/58685 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 535222 event pairs, 21480 based on Foata normal form. 0/56169 useless extension candidates. Maximal degree in co-relation 106761. Up to 47633 conditions per place. [2024-11-16 19:20:09,397 INFO L140 encePairwiseOnDemand]: 116/119 looper letters, 51 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-11-16 19:20:09,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 312 flow [2024-11-16 19:20:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:20:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:20:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2024-11-16 19:20:09,401 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-11-16 19:20:09,401 INFO L175 Difference]: Start difference. First operand has 98 places, 83 transitions, 184 flow. Second operand 3 states and 192 transitions. [2024-11-16 19:20:09,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 312 flow [2024-11-16 19:20:09,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 310 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:09,408 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 194 flow [2024-11-16 19:20:09,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2024-11-16 19:20:09,408 INFO L277 CegarLoopForPetriNet]: 97 programPoint places, -5 predicate places. [2024-11-16 19:20:09,408 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 194 flow [2024-11-16 19:20:09,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2024-11-16 19:20:09,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:09,409 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-16 19:20:09,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:20:09,413 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:09,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2144610496, now seen corresponding path program 1 times [2024-11-16 19:20:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049826670] [2024-11-16 19:20:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:09,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:09,478 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:09,478 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:09,479 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:09,479 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:09,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:20:09,479 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:20:09,480 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:09,480 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:20:09,550 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-16 19:20:09,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 146 transitions, 332 flow [2024-11-16 19:20:09,605 INFO L124 PetriNetUnfolderBase]: 96/382 cut-off events. [2024-11-16 19:20:09,605 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-16 19:20:09,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 382 events. 96/382 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1675 event pairs, 6 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 282. Up to 32 conditions per place. [2024-11-16 19:20:09,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 146 transitions, 332 flow [2024-11-16 19:20:09,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 146 transitions, 332 flow [2024-11-16 19:20:09,615 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:09,615 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5fbd4315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:09,615 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:09,623 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:09,623 INFO L124 PetriNetUnfolderBase]: 12/70 cut-off events. [2024-11-16 19:20:09,623 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:20:09,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:09,624 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:09,624 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:09,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1830432718, now seen corresponding path program 1 times [2024-11-16 19:20:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758589733] [2024-11-16 19:20:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:09,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:09,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:09,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758589733] [2024-11-16 19:20:09,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758589733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:09,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:09,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293330839] [2024-11-16 19:20:09,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:09,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:09,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:09,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:09,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:09,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 146 [2024-11-16 19:20:09,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 146 transitions, 332 flow. Second operand has 2 states, 2 states have (on average 60.5) internal successors, (121), 2 states have internal predecessors, (121), 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) [2024-11-16 19:20:09,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:09,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 146 [2024-11-16 19:20:09,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand