./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/pthread/stack-1.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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:07:45,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:07:45,506 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:07:45,514 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:07:45,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:07:45,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:07:45,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:07:45,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:07:45,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:07:45,549 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:07:45,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:07:45,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:07:45,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:07:45,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:07:45,553 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:07:45,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:07:45,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:07:45,554 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:07:45,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:07:45,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:07:45,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:07:45,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:07:45,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:07:45,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:07:45,556 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:07:45,556 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:07:45,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:07:45,557 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:07:45,557 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:07:45,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:07:45,557 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:07:45,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:07:45,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:07:45,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:07:45,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:07:45,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:07:45,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:07:45,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:07:45,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:07:45,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:07:45,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:07:45,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:07:45,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2024-11-10 10:07:45,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:07:45,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:07:45,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:07:45,878 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:07:45,880 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:07:45,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-1.i [2024-11-10 10:07:47,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:07:47,574 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:07:47,575 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2024-11-10 10:07:47,602 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52f94a700/a152f296540046138f8e8427d8ce5792/FLAG3d7d77368 [2024-11-10 10:07:47,619 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52f94a700/a152f296540046138f8e8427d8ce5792 [2024-11-10 10:07:47,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:07:47,624 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:07:47,625 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:07:47,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:07:47,631 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:07:47,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:07:47" (1/1) ... [2024-11-10 10:07:47,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7cf815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:47, skipping insertion in model container [2024-11-10 10:07:47,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:07:47" (1/1) ... [2024-11-10 10:07:47,692 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:07:48,095 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/pthread/stack-1.i[41520,41533] [2024-11-10 10:07:48,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:07:48,147 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:07:48,210 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/pthread/stack-1.i[41520,41533] [2024-11-10 10:07:48,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:07:48,271 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:07:48,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48 WrapperNode [2024-11-10 10:07:48,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:07:48,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:07:48,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:07:48,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:07:48,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,327 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2024-11-10 10:07:48,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:07:48,328 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:07:48,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:07:48,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:07:48,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,367 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2024-11-10 10:07:48,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,377 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,378 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:07:48,388 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:07:48,388 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:07:48,388 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:07:48,389 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (1/1) ... [2024-11-10 10:07:48,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:07:48,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:07:48,428 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) [2024-11-10 10:07:48,431 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 [2024-11-10 10:07:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-10 10:07:48,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-10 10:07:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-10 10:07:48,506 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-10 10:07:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 10:07:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:07:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:07:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 10:07:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:07:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:07:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 10:07:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 10:07:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:07:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:07:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:07:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 10:07:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:07:48,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:07:48,510 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:07:48,703 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:07:48,706 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:07:48,943 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L986-1: pop_#res#1 := 0; [2024-11-10 10:07:48,944 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L984: havoc pop_#t~mem37#1; [2024-11-10 10:07:48,944 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L984-1: havoc pop_#t~ret36#1; [2024-11-10 10:07:48,945 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:07:48,946 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:07:49,180 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:07:49,180 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:07:49,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:07:49 BoogieIcfgContainer [2024-11-10 10:07:49,181 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:07:49,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:07:49,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:07:49,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:07:49,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:07:47" (1/3) ... [2024-11-10 10:07:49,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d4e2637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:07:49, skipping insertion in model container [2024-11-10 10:07:49,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:07:48" (2/3) ... [2024-11-10 10:07:49,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d4e2637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:07:49, skipping insertion in model container [2024-11-10 10:07:49,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:07:49" (3/3) ... [2024-11-10 10:07:49,188 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-11-10 10:07:49,203 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:07:49,203 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-10 10:07:49,204 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:07:49,262 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:07:49,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 40 transitions, 94 flow [2024-11-10 10:07:49,332 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2024-11-10 10:07:49,333 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:07:49,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 7/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2024-11-10 10:07:49,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 40 transitions, 94 flow [2024-11-10 10:07:49,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 81 flow [2024-11-10 10:07:49,361 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:07:49,368 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;@6041efad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:07:49,369 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-10 10:07:49,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:07:49,377 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-11-10 10:07:49,378 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:07:49,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:49,379 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:49,379 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:07:49,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash 968622553, now seen corresponding path program 1 times [2024-11-10 10:07:49,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:49,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000393453] [2024-11-10 10:07:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:49,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:49,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:07:49,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000393453] [2024-11-10 10:07:49,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000393453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:07:49,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:07:49,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:07:49,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779049823] [2024-11-10 10:07:49,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:07:49,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:07:49,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:07:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:07:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:07:49,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:07:49,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-11-10 10:07:49,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:07:49,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:07:49,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:07:50,260 INFO L124 PetriNetUnfolderBase]: 395/809 cut-off events. [2024-11-10 10:07:50,260 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-10 10:07:50,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 809 events. 395/809 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4045 event pairs, 84 based on Foata normal form. 113/817 useless extension candidates. Maximal degree in co-relation 1431. Up to 343 conditions per place. [2024-11-10 10:07:50,274 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 52 selfloop transitions, 6 changer transitions 2/69 dead transitions. [2024-11-10 10:07:50,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 69 transitions, 276 flow [2024-11-10 10:07:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:07:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:07:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-10 10:07:50,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-11-10 10:07:50,292 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 81 flow. Second operand 5 states and 129 transitions. [2024-11-10 10:07:50,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 69 transitions, 276 flow [2024-11-10 10:07:50,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 69 transitions, 267 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 10:07:50,303 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 120 flow [2024-11-10 10:07:50,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-11-10 10:07:50,309 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-11-10 10:07:50,309 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 120 flow [2024-11-10 10:07:50,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-11-10 10:07:50,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:50,310 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:50,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:07:50,311 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:07:50,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1844504328, now seen corresponding path program 1 times [2024-11-10 10:07:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629483531] [2024-11-10 10:07:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:50,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:07:50,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629483531] [2024-11-10 10:07:50,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629483531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:07:50,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210958995] [2024-11-10 10:07:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:07:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:07:50,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:07:50,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:07:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:50,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:07:50,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:07:50,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:07:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:50,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:07:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:50,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210958995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:07:50,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:07:50,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-10 10:07:50,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993797954] [2024-11-10 10:07:50,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:07:50,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:07:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:07:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:07:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:07:51,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:07:51,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 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) [2024-11-10 10:07:51,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:07:51,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:07:51,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:07:51,650 INFO L124 PetriNetUnfolderBase]: 1222/2510 cut-off events. [2024-11-10 10:07:51,650 INFO L125 PetriNetUnfolderBase]: For 943/949 co-relation queries the response was YES. [2024-11-10 10:07:51,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5494 conditions, 2510 events. 1222/2510 cut-off events. For 943/949 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15226 event pairs, 173 based on Foata normal form. 21/2300 useless extension candidates. Maximal degree in co-relation 4874. Up to 507 conditions per place. [2024-11-10 10:07:51,675 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 151 selfloop transitions, 32 changer transitions 2/194 dead transitions. [2024-11-10 10:07:51,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 194 transitions, 957 flow [2024-11-10 10:07:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 10:07:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 10:07:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 327 transitions. [2024-11-10 10:07:51,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6288461538461538 [2024-11-10 10:07:51,683 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 120 flow. Second operand 13 states and 327 transitions. [2024-11-10 10:07:51,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 194 transitions, 957 flow [2024-11-10 10:07:51,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 194 transitions, 957 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:07:51,692 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 422 flow [2024-11-10 10:07:51,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=422, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2024-11-10 10:07:51,695 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2024-11-10 10:07:51,695 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 422 flow [2024-11-10 10:07:51,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 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) [2024-11-10 10:07:51,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:51,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:51,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:07:51,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:07:51,901 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:07:51,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1237518320, now seen corresponding path program 1 times [2024-11-10 10:07:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023087839] [2024-11-10 10:07:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:52,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:07:52,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023087839] [2024-11-10 10:07:52,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023087839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:07:52,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:07:52,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:07:52,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462095648] [2024-11-10 10:07:52,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:07:52,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:07:52,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:07:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:07:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:07:52,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-10 10:07:52,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-10 10:07:52,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:07:52,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-10 10:07:52,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:07:52,203 INFO L124 PetriNetUnfolderBase]: 636/1423 cut-off events. [2024-11-10 10:07:52,203 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-11-10 10:07:52,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3236 conditions, 1423 events. 636/1423 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8182 event pairs, 210 based on Foata normal form. 62/1377 useless extension candidates. Maximal degree in co-relation 3087. Up to 605 conditions per place. [2024-11-10 10:07:52,213 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 42 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-10 10:07:52,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 380 flow [2024-11-10 10:07:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:07:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:07:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-10 10:07:52,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-10 10:07:52,215 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 422 flow. Second operand 3 states and 70 transitions. [2024-11-10 10:07:52,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 380 flow [2024-11-10 10:07:52,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 332 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-10 10:07:52,229 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 225 flow [2024-11-10 10:07:52,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-10 10:07:52,230 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2024-11-10 10:07:52,230 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 225 flow [2024-11-10 10:07:52,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-10 10:07:52,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:52,230 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:52,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:07:52,231 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:07:52,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1205414599, now seen corresponding path program 1 times [2024-11-10 10:07:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:52,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944710693] [2024-11-10 10:07:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:52,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:52,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:07:52,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944710693] [2024-11-10 10:07:52,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944710693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:07:52,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:07:52,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:07:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380411307] [2024-11-10 10:07:52,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:07:52,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:07:52,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:07:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:07:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:07:52,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:07:52,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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) [2024-11-10 10:07:52,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:07:52,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:07:52,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:07:53,080 INFO L124 PetriNetUnfolderBase]: 820/1818 cut-off events. [2024-11-10 10:07:53,080 INFO L125 PetriNetUnfolderBase]: For 920/922 co-relation queries the response was YES. [2024-11-10 10:07:53,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1818 events. 820/1818 cut-off events. For 920/922 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11091 event pairs, 244 based on Foata normal form. 0/1698 useless extension candidates. Maximal degree in co-relation 3734. Up to 836 conditions per place. [2024-11-10 10:07:53,090 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 60 selfloop transitions, 13 changer transitions 6/88 dead transitions. [2024-11-10 10:07:53,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 516 flow [2024-11-10 10:07:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:07:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:07:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-10 10:07:53,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-10 10:07:53,093 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 225 flow. Second operand 5 states and 114 transitions. [2024-11-10 10:07:53,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 516 flow [2024-11-10 10:07:53,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:07:53,100 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 328 flow [2024-11-10 10:07:53,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-11-10 10:07:53,101 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2024-11-10 10:07:53,102 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 328 flow [2024-11-10 10:07:53,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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) [2024-11-10 10:07:53,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:53,103 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:53,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:07:53,103 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:07:53,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1584220114, now seen corresponding path program 1 times [2024-11-10 10:07:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:53,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012937509] [2024-11-10 10:07:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:07:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012937509] [2024-11-10 10:07:53,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012937509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:07:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473307190] [2024-11-10 10:07:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:53,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:07:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:07:53,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:07:53,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:07:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:53,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-10 10:07:53,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:07:53,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:07:53,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-10 10:07:54,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-11-10 10:07:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:54,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:07:54,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-11-10 10:07:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:54,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473307190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:07:54,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:07:54,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-10 10:07:54,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414307800] [2024-11-10 10:07:54,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:07:54,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:07:54,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:07:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:07:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:07:54,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:07:54,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 328 flow. Second operand has 15 states, 15 states have (on average 14.6) internal successors, (219), 15 states have internal predecessors, (219), 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) [2024-11-10 10:07:54,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:07:54,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:07:54,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:07:56,320 INFO L124 PetriNetUnfolderBase]: 2546/5578 cut-off events. [2024-11-10 10:07:56,321 INFO L125 PetriNetUnfolderBase]: For 5491/5491 co-relation queries the response was YES. [2024-11-10 10:07:56,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12840 conditions, 5578 events. 2546/5578 cut-off events. For 5491/5491 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 41544 event pairs, 362 based on Foata normal form. 7/5289 useless extension candidates. Maximal degree in co-relation 11693. Up to 821 conditions per place. [2024-11-10 10:07:56,354 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 291 selfloop transitions, 78 changer transitions 38/416 dead transitions. [2024-11-10 10:07:56,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 416 transitions, 2507 flow [2024-11-10 10:07:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-10 10:07:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-10 10:07:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 745 transitions. [2024-11-10 10:07:56,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-11-10 10:07:56,358 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 328 flow. Second operand 33 states and 745 transitions. [2024-11-10 10:07:56,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 416 transitions, 2507 flow [2024-11-10 10:07:56,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 416 transitions, 2507 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:07:56,393 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 1016 flow [2024-11-10 10:07:56,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1016, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2024-11-10 10:07:56,396 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 63 predicate places. [2024-11-10 10:07:56,397 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 1016 flow [2024-11-10 10:07:56,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.6) internal successors, (219), 15 states have internal predecessors, (219), 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) [2024-11-10 10:07:56,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:56,397 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:56,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:07:56,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:07:56,599 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:07:56,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash -428033811, now seen corresponding path program 1 times [2024-11-10 10:07:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:56,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532086002] [2024-11-10 10:07:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:07:56,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:07:56,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532086002] [2024-11-10 10:07:56,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532086002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:07:56,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479973073] [2024-11-10 10:07:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:56,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:07:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:07:56,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:07:56,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:07:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:56,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:07:56,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:07:56,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:07:57,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:07:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:57,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:07:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:07:57,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479973073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:07:57,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:07:57,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2024-11-10 10:07:57,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465242978] [2024-11-10 10:07:57,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:07:57,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:07:57,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:07:57,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:07:57,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:07:57,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:07:57,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 1016 flow. Second operand has 11 states, 11 states have (on average 16.272727272727273) internal successors, (179), 11 states have internal predecessors, (179), 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) [2024-11-10 10:07:57,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:07:57,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:07:57,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:07:58,959 INFO L124 PetriNetUnfolderBase]: 4012/8866 cut-off events. [2024-11-10 10:07:58,959 INFO L125 PetriNetUnfolderBase]: For 14206/14206 co-relation queries the response was YES. [2024-11-10 10:07:58,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21247 conditions, 8866 events. 4012/8866 cut-off events. For 14206/14206 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 69904 event pairs, 721 based on Foata normal form. 104/8441 useless extension candidates. Maximal degree in co-relation 20222. Up to 1298 conditions per place. [2024-11-10 10:07:59,020 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 183 selfloop transitions, 131 changer transitions 4/327 dead transitions. [2024-11-10 10:07:59,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 327 transitions, 2665 flow [2024-11-10 10:07:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:07:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:07:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 407 transitions. [2024-11-10 10:07:59,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5652777777777778 [2024-11-10 10:07:59,023 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 1016 flow. Second operand 18 states and 407 transitions. [2024-11-10 10:07:59,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 327 transitions, 2665 flow [2024-11-10 10:07:59,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 327 transitions, 2625 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-11-10 10:07:59,102 INFO L231 Difference]: Finished difference. Result has 122 places, 177 transitions, 1908 flow [2024-11-10 10:07:59,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1908, PETRI_PLACES=122, PETRI_TRANSITIONS=177} [2024-11-10 10:07:59,103 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 86 predicate places. [2024-11-10 10:07:59,104 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 177 transitions, 1908 flow [2024-11-10 10:07:59,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.272727272727273) internal successors, (179), 11 states have internal predecessors, (179), 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) [2024-11-10 10:07:59,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:59,104 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:59,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:07:59,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:07:59,309 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:07:59,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash 889996616, now seen corresponding path program 1 times [2024-11-10 10:07:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:59,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106386540] [2024-11-10 10:07:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:59,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:00,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:00,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106386540] [2024-11-10 10:08:00,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106386540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:00,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59701307] [2024-11-10 10:08:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:00,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:00,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:00,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:08:00,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:08:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:00,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 10:08:00,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:00,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 10:08:00,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-11-10 10:08:00,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-11-10 10:08:00,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:00,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 43 [2024-11-10 10:08:01,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:01,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-11-10 10:08:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:01,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:01,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:01,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2024-11-10 10:08:01,902 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-10 10:08:01,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 68 [2024-11-10 10:08:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:01,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59701307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:01,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:01,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-10 10:08:01,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212664520] [2024-11-10 10:08:01,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:01,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 10:08:01,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 10:08:01,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-11-10 10:08:01,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:01,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 177 transitions, 1908 flow. Second operand has 17 states, 17 states have (on average 15.058823529411764) internal successors, (256), 17 states have internal predecessors, (256), 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) [2024-11-10 10:08:01,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:01,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:01,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:05,917 INFO L124 PetriNetUnfolderBase]: 6268/13817 cut-off events. [2024-11-10 10:08:05,918 INFO L125 PetriNetUnfolderBase]: For 31304/31306 co-relation queries the response was YES. [2024-11-10 10:08:05,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34774 conditions, 13817 events. 6268/13817 cut-off events. For 31304/31306 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 111895 event pairs, 1252 based on Foata normal form. 70/13096 useless extension candidates. Maximal degree in co-relation 33557. Up to 2045 conditions per place. [2024-11-10 10:08:06,010 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 264 selfloop transitions, 202 changer transitions 48/523 dead transitions. [2024-11-10 10:08:06,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 523 transitions, 4751 flow [2024-11-10 10:08:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-10 10:08:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-10 10:08:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 676 transitions. [2024-11-10 10:08:06,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451612903225806 [2024-11-10 10:08:06,017 INFO L175 Difference]: Start difference. First operand has 122 places, 177 transitions, 1908 flow. Second operand 31 states and 676 transitions. [2024-11-10 10:08:06,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 523 transitions, 4751 flow [2024-11-10 10:08:06,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 523 transitions, 4673 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-11-10 10:08:06,172 INFO L231 Difference]: Finished difference. Result has 156 places, 255 transitions, 3260 flow [2024-11-10 10:08:06,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3260, PETRI_PLACES=156, PETRI_TRANSITIONS=255} [2024-11-10 10:08:06,173 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 120 predicate places. [2024-11-10 10:08:06,173 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 255 transitions, 3260 flow [2024-11-10 10:08:06,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.058823529411764) internal successors, (256), 17 states have internal predecessors, (256), 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) [2024-11-10 10:08:06,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:06,173 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-10 10:08:06,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 10:08:06,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:06,374 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:06,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:06,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1885087769, now seen corresponding path program 2 times [2024-11-10 10:08:06,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:06,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360696015] [2024-11-10 10:08:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:06,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:06,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360696015] [2024-11-10 10:08:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360696015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695017465] [2024-11-10 10:08:06,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:08:06,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:06,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:06,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:08:06,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:08:06,733 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:08:06,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:08:06,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 10:08:06,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:06,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:08:06,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:08:06,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:08:06,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 10:08:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:06,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:07,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695017465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:07,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:07,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-11-10 10:08:07,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678615142] [2024-11-10 10:08:07,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:07,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:08:07,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:08:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:08:07,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:07,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 255 transitions, 3260 flow. Second operand has 20 states, 20 states have (on average 14.8) internal successors, (296), 20 states have internal predecessors, (296), 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) [2024-11-10 10:08:07,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:07,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:07,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:11,766 INFO L124 PetriNetUnfolderBase]: 12500/27434 cut-off events. [2024-11-10 10:08:11,766 INFO L125 PetriNetUnfolderBase]: For 93277/93291 co-relation queries the response was YES. [2024-11-10 10:08:11,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74403 conditions, 27434 events. 12500/27434 cut-off events. For 93277/93291 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 256535 event pairs, 2911 based on Foata normal form. 455/26308 useless extension candidates. Maximal degree in co-relation 72356. Up to 4093 conditions per place. [2024-11-10 10:08:11,953 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 543 selfloop transitions, 432 changer transitions 2/986 dead transitions. [2024-11-10 10:08:11,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 986 transitions, 9929 flow [2024-11-10 10:08:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-10 10:08:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-11-10 10:08:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 1181 transitions. [2024-11-10 10:08:11,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5570754716981132 [2024-11-10 10:08:11,958 INFO L175 Difference]: Start difference. First operand has 156 places, 255 transitions, 3260 flow. Second operand 53 states and 1181 transitions. [2024-11-10 10:08:11,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 986 transitions, 9929 flow [2024-11-10 10:08:13,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 986 transitions, 9690 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-11-10 10:08:13,148 INFO L231 Difference]: Finished difference. Result has 218 places, 512 transitions, 7016 flow [2024-11-10 10:08:13,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=7016, PETRI_PLACES=218, PETRI_TRANSITIONS=512} [2024-11-10 10:08:13,149 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 182 predicate places. [2024-11-10 10:08:13,149 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 512 transitions, 7016 flow [2024-11-10 10:08:13,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.8) internal successors, (296), 20 states have internal predecessors, (296), 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) [2024-11-10 10:08:13,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:13,150 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2024-11-10 10:08:13,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 10:08:13,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:13,351 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:13,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 207841976, now seen corresponding path program 3 times [2024-11-10 10:08:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:13,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950560945] [2024-11-10 10:08:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:13,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:13,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950560945] [2024-11-10 10:08:13,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950560945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:13,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906405226] [2024-11-10 10:08:13,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:08:13,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:13,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:13,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:08:13,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:08:13,715 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-10 10:08:13,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:08:13,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 10:08:13,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:13,777 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:08:13,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906405226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:08:13,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:08:13,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-11-10 10:08:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917594400] [2024-11-10 10:08:13,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:08:13,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:08:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:08:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-10 10:08:13,787 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-10 10:08:13,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 512 transitions, 7016 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 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) [2024-11-10 10:08:13,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:13,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-10 10:08:13,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:18,165 INFO L124 PetriNetUnfolderBase]: 13541/28879 cut-off events. [2024-11-10 10:08:18,166 INFO L125 PetriNetUnfolderBase]: For 67477/67479 co-relation queries the response was YES. [2024-11-10 10:08:18,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73802 conditions, 28879 events. 13541/28879 cut-off events. For 67477/67479 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 263462 event pairs, 1717 based on Foata normal form. 2/26841 useless extension candidates. Maximal degree in co-relation 73750. Up to 9919 conditions per place. [2024-11-10 10:08:18,435 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 321 selfloop transitions, 10 changer transitions 199/570 dead transitions. [2024-11-10 10:08:18,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 570 transitions, 7640 flow [2024-11-10 10:08:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 10:08:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 10:08:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-10 10:08:18,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-11-10 10:08:18,437 INFO L175 Difference]: Start difference. First operand has 218 places, 512 transitions, 7016 flow. Second operand 8 states and 194 transitions. [2024-11-10 10:08:18,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 570 transitions, 7640 flow [2024-11-10 10:08:19,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 570 transitions, 6886 flow, removed 85 selfloop flow, removed 23 redundant places. [2024-11-10 10:08:19,097 INFO L231 Difference]: Finished difference. Result has 181 places, 179 transitions, 1830 flow [2024-11-10 10:08:19,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3135, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1830, PETRI_PLACES=181, PETRI_TRANSITIONS=179} [2024-11-10 10:08:19,098 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 145 predicate places. [2024-11-10 10:08:19,098 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 179 transitions, 1830 flow [2024-11-10 10:08:19,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 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) [2024-11-10 10:08:19,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:19,099 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:19,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 10:08:19,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:19,300 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:19,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash 58636247, now seen corresponding path program 2 times [2024-11-10 10:08:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:19,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105293088] [2024-11-10 10:08:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:19,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:20,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105293088] [2024-11-10 10:08:20,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105293088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:20,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315269024] [2024-11-10 10:08:20,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:08:20,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:20,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:20,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:08:20,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 10:08:20,651 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:08:20,652 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:08:20,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 10:08:20,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:20,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 10:08:20,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-11-10 10:08:20,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-11-10 10:08:20,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2024-11-10 10:08:21,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 95 [2024-11-10 10:08:21,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:21,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-11-10 10:08:21,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:21,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 69 [2024-11-10 10:08:23,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:23,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 107 [2024-11-10 10:08:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:23,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:24,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315269024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:24,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:24,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-11-10 10:08:24,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834909352] [2024-11-10 10:08:24,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:24,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 10:08:24,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:24,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 10:08:24,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-11-10 10:08:24,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:24,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 179 transitions, 1830 flow. Second operand has 26 states, 26 states have (on average 14.807692307692308) internal successors, (385), 26 states have internal predecessors, (385), 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) [2024-11-10 10:08:24,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:24,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:24,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:26,713 INFO L124 PetriNetUnfolderBase]: 5338/12498 cut-off events. [2024-11-10 10:08:26,713 INFO L125 PetriNetUnfolderBase]: For 39024/39024 co-relation queries the response was YES. [2024-11-10 10:08:26,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33085 conditions, 12498 events. 5338/12498 cut-off events. For 39024/39024 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 103835 event pairs, 819 based on Foata normal form. 192/12155 useless extension candidates. Maximal degree in co-relation 33048. Up to 1891 conditions per place. [2024-11-10 10:08:26,794 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 230 selfloop transitions, 112 changer transitions 70/424 dead transitions. [2024-11-10 10:08:26,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 424 transitions, 3580 flow [2024-11-10 10:08:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 10:08:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-10 10:08:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 563 transitions. [2024-11-10 10:08:26,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5026785714285714 [2024-11-10 10:08:26,797 INFO L175 Difference]: Start difference. First operand has 181 places, 179 transitions, 1830 flow. Second operand 28 states and 563 transitions. [2024-11-10 10:08:26,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 424 transitions, 3580 flow [2024-11-10 10:08:26,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 424 transitions, 3514 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-11-10 10:08:26,993 INFO L231 Difference]: Finished difference. Result has 184 places, 172 transitions, 1718 flow [2024-11-10 10:08:26,993 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1718, PETRI_PLACES=184, PETRI_TRANSITIONS=172} [2024-11-10 10:08:26,994 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2024-11-10 10:08:26,994 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 172 transitions, 1718 flow [2024-11-10 10:08:26,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.807692307692308) internal successors, (385), 26 states have internal predecessors, (385), 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) [2024-11-10 10:08:26,994 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:26,995 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:27,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 10:08:27,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:27,195 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:27,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1068543622, now seen corresponding path program 3 times [2024-11-10 10:08:27,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:27,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385670275] [2024-11-10 10:08:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:27,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385670275] [2024-11-10 10:08:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385670275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674591974] [2024-11-10 10:08:28,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:08:28,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:28,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:28,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:08:28,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 10:08:28,883 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 10:08:28,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:08:28,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-10 10:08:28,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:28,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 10:08:28,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2024-11-10 10:08:28,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 64 [2024-11-10 10:08:29,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2024-11-10 10:08:29,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 83 [2024-11-10 10:08:29,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 99 [2024-11-10 10:08:29,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 57 [2024-11-10 10:08:29,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 103 [2024-11-10 10:08:32,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:32,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 217 treesize of output 113 [2024-11-10 10:08:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:32,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674591974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:33,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:33,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2024-11-10 10:08:33,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893568144] [2024-11-10 10:08:33,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:33,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-10 10:08:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-10 10:08:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2024-11-10 10:08:33,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:33,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 172 transitions, 1718 flow. Second operand has 32 states, 32 states have (on average 14.65625) internal successors, (469), 32 states have internal predecessors, (469), 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) [2024-11-10 10:08:33,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:33,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:33,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:37,418 INFO L124 PetriNetUnfolderBase]: 4667/11168 cut-off events. [2024-11-10 10:08:37,418 INFO L125 PetriNetUnfolderBase]: For 26724/26724 co-relation queries the response was YES. [2024-11-10 10:08:37,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29274 conditions, 11168 events. 4667/11168 cut-off events. For 26724/26724 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 92149 event pairs, 692 based on Foata normal form. 39/10723 useless extension candidates. Maximal degree in co-relation 29233. Up to 1746 conditions per place. [2024-11-10 10:08:37,496 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 161 selfloop transitions, 37 changer transitions 225/435 dead transitions. [2024-11-10 10:08:37,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 435 transitions, 3464 flow [2024-11-10 10:08:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 10:08:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-10 10:08:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 661 transitions. [2024-11-10 10:08:37,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4860294117647059 [2024-11-10 10:08:37,499 INFO L175 Difference]: Start difference. First operand has 184 places, 172 transitions, 1718 flow. Second operand 34 states and 661 transitions. [2024-11-10 10:08:37,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 435 transitions, 3464 flow [2024-11-10 10:08:37,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 435 transitions, 3283 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-11-10 10:08:37,630 INFO L231 Difference]: Finished difference. Result has 210 places, 83 transitions, 801 flow [2024-11-10 10:08:37,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=801, PETRI_PLACES=210, PETRI_TRANSITIONS=83} [2024-11-10 10:08:37,631 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 174 predicate places. [2024-11-10 10:08:37,631 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 83 transitions, 801 flow [2024-11-10 10:08:37,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 14.65625) internal successors, (469), 32 states have internal predecessors, (469), 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) [2024-11-10 10:08:37,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:37,631 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:37,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 10:08:37,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-10 10:08:37,832 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:37,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash 300355901, now seen corresponding path program 4 times [2024-11-10 10:08:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:37,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628396141] [2024-11-10 10:08:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:37,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 68 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:39,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:39,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628396141] [2024-11-10 10:08:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628396141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077393645] [2024-11-10 10:08:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:08:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:39,920 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:08:39,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 10:08:40,085 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:08:40,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:08:40,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 10:08:40,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:40,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 10:08:40,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-11-10 10:08:40,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-11-10 10:08:40,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2024-11-10 10:08:40,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 95 [2024-11-10 10:08:40,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:40,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-11-10 10:08:40,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2024-11-10 10:08:40,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 185 [2024-11-10 10:08:40,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:40,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 175 [2024-11-10 10:08:40,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 126 [2024-11-10 10:08:42,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 465 treesize of output 365 [2024-11-10 10:08:42,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:42,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 365 treesize of output 289 [2024-11-10 10:08:42,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 391 treesize of output 313 [2024-11-10 10:08:57,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:57,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 911 treesize of output 407 [2024-11-10 10:08:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:57,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077393645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:58,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:58,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2024-11-10 10:08:58,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825255096] [2024-11-10 10:08:58,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:58,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-10 10:08:58,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-10 10:08:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2024-11-10 10:08:58,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:58,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 83 transitions, 801 flow. Second operand has 36 states, 36 states have (on average 15.416666666666666) internal successors, (555), 36 states have internal predecessors, (555), 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) [2024-11-10 10:08:58,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:58,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:58,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:09:02,359 INFO L124 PetriNetUnfolderBase]: 2434/5783 cut-off events. [2024-11-10 10:09:02,359 INFO L125 PetriNetUnfolderBase]: For 14420/14420 co-relation queries the response was YES. [2024-11-10 10:09:02,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15567 conditions, 5783 events. 2434/5783 cut-off events. For 14420/14420 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 38778 event pairs, 280 based on Foata normal form. 14/5568 useless extension candidates. Maximal degree in co-relation 15524. Up to 929 conditions per place. [2024-11-10 10:09:02,395 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 270/270 dead transitions. [2024-11-10 10:09:02,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 270 transitions, 1990 flow [2024-11-10 10:09:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 10:09:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-10 10:09:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 462 transitions. [2024-11-10 10:09:02,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-11-10 10:09:02,397 INFO L175 Difference]: Start difference. First operand has 210 places, 83 transitions, 801 flow. Second operand 24 states and 462 transitions. [2024-11-10 10:09:02,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 270 transitions, 1990 flow [2024-11-10 10:09:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 270 transitions, 1639 flow, removed 7 selfloop flow, removed 65 redundant places. [2024-11-10 10:09:02,421 INFO L231 Difference]: Finished difference. Result has 122 places, 0 transitions, 0 flow [2024-11-10 10:09:02,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=0, PETRI_PLACES=122, PETRI_TRANSITIONS=0} [2024-11-10 10:09:02,422 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 86 predicate places. [2024-11-10 10:09:02,422 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 0 transitions, 0 flow [2024-11-10 10:09:02,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 15.416666666666666) internal successors, (555), 36 states have internal predecessors, (555), 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) [2024-11-10 10:09:02,425 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-10 10:09:02,425 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-10 10:09:02,425 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-10 10:09:02,425 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-10 10:09:02,425 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-10 10:09:02,426 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-10 10:09:02,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 10:09:02,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:09:02,627 INFO L407 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1] [2024-11-10 10:09:02,631 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-10 10:09:02,631 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-10 10:09:02,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 10:09:02 BasicIcfg [2024-11-10 10:09:02,635 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-10 10:09:02,635 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-10 10:09:02,635 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-10 10:09:02,636 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-10 10:09:02,636 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:07:49" (3/4) ... [2024-11-10 10:09:02,638 INFO L143 WitnessPrinter]: Generating witness for correct program [2024-11-10 10:09:02,641 INFO L393 IcfgBacktranslator]: Ignoring RootEdge to procedure t1 [2024-11-10 10:09:02,641 INFO L393 IcfgBacktranslator]: Ignoring RootEdge to procedure t2 [2024-11-10 10:09:02,646 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 32 nodes and edges [2024-11-10 10:09:02,646 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-11-10 10:09:02,646 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-11-10 10:09:02,647 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-10 10:09:02,726 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-10 10:09:02,727 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-10 10:09:02,727 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-10 10:09:02,727 INFO L158 Benchmark]: Toolchain (without parser) took 75104.34ms. Allocated memory was 182.5MB in the beginning and 9.1GB in the end (delta: 9.0GB). Free memory was 144.3MB in the beginning and 4.9GB in the end (delta: -4.7GB). Peak memory consumption was 4.2GB. Max. memory is 16.1GB. [2024-11-10 10:09:02,728 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory was 72.3MB in the beginning and 72.1MB in the end (delta: 142.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-10 10:09:02,728 INFO L158 Benchmark]: CACSL2BoogieTranslator took 646.56ms. Allocated memory is still 182.5MB. Free memory was 144.3MB in the beginning and 111.8MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-11-10 10:09:02,728 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.29ms. Allocated memory is still 182.5MB. Free memory was 111.8MB in the beginning and 108.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-10 10:09:02,728 INFO L158 Benchmark]: Boogie Preprocessor took 59.05ms. Allocated memory is still 182.5MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-10 10:09:02,729 INFO L158 Benchmark]: IcfgBuilder took 792.80ms. Allocated memory is still 182.5MB. Free memory was 106.5MB in the beginning and 115.1MB in the end (delta: -8.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-10 10:09:02,729 INFO L158 Benchmark]: TraceAbstraction took 73452.33ms. Allocated memory was 182.5MB in the beginning and 9.1GB in the end (delta: 9.0GB). Free memory was 114.1MB in the beginning and 4.9GB in the end (delta: -4.8GB). Peak memory consumption was 4.2GB. Max. memory is 16.1GB. [2024-11-10 10:09:02,729 INFO L158 Benchmark]: Witness Printer took 91.47ms. Allocated memory is still 9.1GB. Free memory was 4.9GB in the beginning and 4.9GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-10 10:09:02,730 INFO L338 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 100.7MB. Free memory was 72.3MB in the beginning and 72.1MB in the end (delta: 142.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 646.56ms. Allocated memory is still 182.5MB. Free memory was 144.3MB in the beginning and 111.8MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.29ms. Allocated memory is still 182.5MB. Free memory was 111.8MB in the beginning and 108.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.05ms. Allocated memory is still 182.5MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 792.80ms. Allocated memory is still 182.5MB. Free memory was 106.5MB in the beginning and 115.1MB in the end (delta: -8.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 73452.33ms. Allocated memory was 182.5MB in the beginning and 9.1GB in the end (delta: 9.0GB). Free memory was 114.1MB in the beginning and 4.9GB in the end (delta: -4.8GB). Peak memory consumption was 4.2GB. Max. memory is 16.1GB. * Witness Printer took 91.47ms. Allocated memory is still 9.1GB. Free memory was 4.9GB in the beginning and 4.9GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 61 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 73.3s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 31.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3685 SdHoareTripleChecker+Valid, 6.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3681 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 5.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 335 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8503 IncrementalHoareTripleChecker+Invalid, 8838 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 335 mSolverCounterUnsat, 1 mSDtfsCounter, 8503 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 991 GetRequests, 659 SyntacticMatches, 3 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3591 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7016occurred in iteration=8, InterpolantAutomatonStates: 255, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 38.0s InterpolantComputationTime, 809 NumberOfCodeBlocks, 809 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1118 ConstructedInterpolants, 13 QuantifiedInterpolants, 67104 SizeOfPredicates, 111 NumberOfNonLiveVariables, 2107 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 29 InterpolantComputations, 4 PerfectInterpolantSequences, 346/1270 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-10 10:09:02,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...