./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/stack_longest-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 17:46:29,110 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 17:46:29,187 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 17:46:29,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 17:46:29,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 17:46:29,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 17:46:29,223 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 17:46:29,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 17:46:29,224 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 17:46:29,225 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 17:46:29,226 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 17:46:29,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 17:46:29,227 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 17:46:29,228 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 17:46:29,229 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 17:46:29,229 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 17:46:29,230 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 17:46:29,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 17:46:29,230 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 17:46:29,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 17:46:29,231 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 17:46:29,231 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 17:46:29,232 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 17:46:29,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 17:46:29,232 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 17:46:29,232 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 17:46:29,233 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 17:46:29,233 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 17:46:29,233 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 17:46:29,234 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 17:46:29,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 17:46:29,234 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 17:46:29,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 17:46:29,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:46:29,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 17:46:29,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 17:46:29,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 17:46:29,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 17:46:29,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 17:46:29,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 17:46:29,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 17:46:29,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 17:46:29,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2024-11-10 17:46:29,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 17:46:29,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 17:46:29,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 17:46:29,489 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 17:46:29,489 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 17:46:29,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-1.i [2024-11-10 17:46:30,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 17:46:31,186 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 17:46:31,187 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-1.i [2024-11-10 17:46:31,206 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aecd05c6/d6b2f81734d64221a0f499a078a2cba4/FLAGa3cf5394b [2024-11-10 17:46:31,219 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aecd05c6/d6b2f81734d64221a0f499a078a2cba4 [2024-11-10 17:46:31,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 17:46:31,227 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 17:46:31,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 17:46:31,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 17:46:31,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 17:46:31,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:46:31" (1/1) ... [2024-11-10 17:46:31,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fa4b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:31, skipping insertion in model container [2024-11-10 17:46:31,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:46:31" (1/1) ... [2024-11-10 17:46:31,288 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 17:46:31,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:46:31,853 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 17:46:31,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:46:32,060 INFO L204 MainTranslator]: Completed translation [2024-11-10 17:46:32,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32 WrapperNode [2024-11-10 17:46:32,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 17:46:32,063 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 17:46:32,063 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 17:46:32,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 17:46:32,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,134 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,233 INFO L138 Inliner]: procedures = 277, calls = 832, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 954 [2024-11-10 17:46:32,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 17:46:32,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 17:46:32,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 17:46:32,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 17:46:32,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,272 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,314 INFO L175 MemorySlicer]: Split 809 memory accesses to 3 slices as follows [2, 802, 5]. 99 percent of accesses are in the largest equivalence class. The 807 initializations are split as follows [2, 800, 5]. The 1 writes are split as follows [0, 1, 0]. [2024-11-10 17:46:32,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,319 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,346 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,347 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 17:46:32,361 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 17:46:32,361 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 17:46:32,361 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 17:46:32,363 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (1/1) ... [2024-11-10 17:46:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:46:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:46:32,399 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 17:46:32,408 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 17:46:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-10 17:46:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-10 17:46:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-10 17:46:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-10 17:46:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 17:46:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 17:46:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 17:46:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 17:46:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 17:46:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 17:46:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 17:46:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 17:46:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 17:46:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 17:46:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 17:46:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 17:46:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 17:46:32,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 17:46:32,459 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 17:46:32,622 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 17:46:32,625 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 17:46:33,787 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2024-11-10 17:46:33,788 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem38#1; [2024-11-10 17:46:33,788 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret37#1; [2024-11-10 17:46:33,789 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 17:46:33,790 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 17:46:46,922 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 17:46:46,926 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 17:46:46,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:46:46 BoogieIcfgContainer [2024-11-10 17:46:46,927 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 17:46:46,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 17:46:46,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 17:46:46,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 17:46:46,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:46:31" (1/3) ... [2024-11-10 17:46:46,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e36f70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:46:46, skipping insertion in model container [2024-11-10 17:46:46,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:46:32" (2/3) ... [2024-11-10 17:46:46,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e36f70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:46:46, skipping insertion in model container [2024-11-10 17:46:46,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:46:46" (3/3) ... [2024-11-10 17:46:46,935 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2024-11-10 17:46:46,953 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 17:46:46,954 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-11-10 17:46:46,954 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 17:46:47,038 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 17:46:47,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 61 transitions, 136 flow [2024-11-10 17:46:47,144 INFO L124 PetriNetUnfolderBase]: 11/59 cut-off events. [2024-11-10 17:46:47,144 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 17:46:47,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 59 events. 11/59 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 148 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2024-11-10 17:46:47,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 61 transitions, 136 flow [2024-11-10 17:46:47,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 58 transitions, 128 flow [2024-11-10 17:46:47,166 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:46:47,174 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=None, 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;@870e801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:46:47,175 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-10 17:46:47,217 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:46:47,218 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-11-10 17:46:47,218 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 17:46:47,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:47,219 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:47,220 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:47,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 666367877, now seen corresponding path program 1 times [2024-11-10 17:46:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:47,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504463929] [2024-11-10 17:46:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:47,998 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 17:46:47,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:47,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504463929] [2024-11-10 17:46:48,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504463929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:48,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:48,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:46:48,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523265121] [2024-11-10 17:46:48,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:48,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:46:48,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:46:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:46:48,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:46:48,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 17:46:48,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:48,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:46:48,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:48,367 INFO L124 PetriNetUnfolderBase]: 454/900 cut-off events. [2024-11-10 17:46:48,367 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-10 17:46:48,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1663 conditions, 900 events. 454/900 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4874 event pairs, 242 based on Foata normal form. 139/908 useless extension candidates. Maximal degree in co-relation 1587. Up to 513 conditions per place. [2024-11-10 17:46:48,378 INFO L140 encePairwiseOnDemand]: 51/61 looper letters, 44 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-11-10 17:46:48,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 237 flow [2024-11-10 17:46:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:46:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:46:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-10 17:46:48,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5450819672131147 [2024-11-10 17:46:48,392 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 128 flow. Second operand 4 states and 133 transitions. [2024-11-10 17:46:48,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 237 flow [2024-11-10 17:46:48,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 227 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 17:46:48,397 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 108 flow [2024-11-10 17:46:48,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-10 17:46:48,402 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-10 17:46:48,402 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 108 flow [2024-11-10 17:46:48,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 17:46:48,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:48,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:48,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 17:46:48,403 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:48,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash 666367878, now seen corresponding path program 1 times [2024-11-10 17:46:48,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383115473] [2024-11-10 17:46:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:49,158 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 17:46:49,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:49,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383115473] [2024-11-10 17:46:49,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383115473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:49,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:49,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:46:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735541617] [2024-11-10 17:46:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:49,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:46:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:46:49,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:46:49,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:46:49,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 17:46:49,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:49,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:46:49,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:49,733 INFO L124 PetriNetUnfolderBase]: 750/1437 cut-off events. [2024-11-10 17:46:49,733 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-10 17:46:49,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2727 conditions, 1437 events. 750/1437 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8273 event pairs, 125 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 829. Up to 849 conditions per place. [2024-11-10 17:46:49,742 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 89 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-11-10 17:46:49,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 113 transitions, 437 flow [2024-11-10 17:46:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 17:46:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 17:46:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-11-10 17:46:49,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5846994535519126 [2024-11-10 17:46:49,746 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 108 flow. Second operand 6 states and 214 transitions. [2024-11-10 17:46:49,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 113 transitions, 437 flow [2024-11-10 17:46:49,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 113 transitions, 429 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 17:46:49,750 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 161 flow [2024-11-10 17:46:49,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-11-10 17:46:49,752 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-11-10 17:46:49,752 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 161 flow [2024-11-10 17:46:49,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 17:46:49,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:49,753 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:49,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 17:46:49,754 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:49,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2074888412, now seen corresponding path program 1 times [2024-11-10 17:46:49,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:49,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599209835] [2024-11-10 17:46:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:49,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:49,980 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 17:46:49,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:49,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599209835] [2024-11-10 17:46:49,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599209835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:49,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:49,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:46:49,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659940742] [2024-11-10 17:46:49,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:49,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:46:49,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:46:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:46:49,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-10 17:46:49,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 17:46:49,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:49,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-10 17:46:49,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:50,252 INFO L124 PetriNetUnfolderBase]: 663/1335 cut-off events. [2024-11-10 17:46:50,252 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-10 17:46:50,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 1335 events. 663/1335 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7455 event pairs, 176 based on Foata normal form. 34/1219 useless extension candidates. Maximal degree in co-relation 2654. Up to 722 conditions per place. [2024-11-10 17:46:50,262 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 69 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2024-11-10 17:46:50,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 92 transitions, 390 flow [2024-11-10 17:46:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:46:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:46:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-11-10 17:46:50,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.580327868852459 [2024-11-10 17:46:50,266 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 161 flow. Second operand 5 states and 177 transitions. [2024-11-10 17:46:50,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 92 transitions, 390 flow [2024-11-10 17:46:50,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 388 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 17:46:50,272 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 169 flow [2024-11-10 17:46:50,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-11-10 17:46:50,274 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-11-10 17:46:50,274 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 169 flow [2024-11-10 17:46:50,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 17:46:50,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:50,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:50,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 17:46:50,276 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:50,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:50,277 INFO L85 PathProgramCache]: Analyzing trace with hash 402512908, now seen corresponding path program 1 times [2024-11-10 17:46:50,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:50,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018516907] [2024-11-10 17:46:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:50,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:50,475 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 17:46:50,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:50,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018516907] [2024-11-10 17:46:50,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018516907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:50,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:50,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 17:46:50,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887732958] [2024-11-10 17:46:50,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:50,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:46:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:46:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:46:50,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-10 17:46:50,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 17:46:50,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:50,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-10 17:46:50,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:50,815 INFO L124 PetriNetUnfolderBase]: 971/1948 cut-off events. [2024-11-10 17:46:50,817 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2024-11-10 17:46:50,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4142 conditions, 1948 events. 971/1948 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11219 event pairs, 464 based on Foata normal form. 0/1761 useless extension candidates. Maximal degree in co-relation 3459. Up to 1053 conditions per place. [2024-11-10 17:46:50,832 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 75 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2024-11-10 17:46:50,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 443 flow [2024-11-10 17:46:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:46:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:46:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-10 17:46:50,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6270491803278688 [2024-11-10 17:46:50,835 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 169 flow. Second operand 4 states and 153 transitions. [2024-11-10 17:46:50,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 443 flow [2024-11-10 17:46:50,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:46:50,842 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 205 flow [2024-11-10 17:46:50,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-10 17:46:50,843 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-10 17:46:50,844 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 205 flow [2024-11-10 17:46:50,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 17:46:50,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:50,845 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:50,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 17:46:50,845 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:50,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:50,846 INFO L85 PathProgramCache]: Analyzing trace with hash 169702731, now seen corresponding path program 1 times [2024-11-10 17:46:50,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:50,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034759287] [2024-11-10 17:46:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:50,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:51,083 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 17:46:51,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034759287] [2024-11-10 17:46:51,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034759287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:51,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:51,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:46:51,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482369809] [2024-11-10 17:46:51,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:51,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:46:51,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:51,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:46:51,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:46:51,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:46:51,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 17:46:51,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:51,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:46:51,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:51,466 INFO L124 PetriNetUnfolderBase]: 950/1862 cut-off events. [2024-11-10 17:46:51,466 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2024-11-10 17:46:51,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 1862 events. 950/1862 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10674 event pairs, 356 based on Foata normal form. 17/1706 useless extension candidates. Maximal degree in co-relation 3709. Up to 1286 conditions per place. [2024-11-10 17:46:51,478 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 53 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-10 17:46:51,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 332 flow [2024-11-10 17:46:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:46:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:46:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-11-10 17:46:51,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6010928961748634 [2024-11-10 17:46:51,480 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 205 flow. Second operand 3 states and 110 transitions. [2024-11-10 17:46:51,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 332 flow [2024-11-10 17:46:51,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 319 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-10 17:46:51,486 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 178 flow [2024-11-10 17:46:51,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-11-10 17:46:51,487 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-11-10 17:46:51,487 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 178 flow [2024-11-10 17:46:51,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 17:46:51,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:51,487 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 17:46:51,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 17:46:51,488 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:51,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash -173982280, now seen corresponding path program 1 times [2024-11-10 17:46:51,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:51,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649608350] [2024-11-10 17:46:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:51,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:51,654 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 17:46:51,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649608350] [2024-11-10 17:46:51,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649608350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:51,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:51,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:46:51,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396217752] [2024-11-10 17:46:51,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:51,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:46:51,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:46:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:46:51,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:46:51,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 17:46:51,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:51,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:46:51,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:51,977 INFO L124 PetriNetUnfolderBase]: 993/1896 cut-off events. [2024-11-10 17:46:51,977 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-11-10 17:46:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4262 conditions, 1896 events. 993/1896 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 10761 event pairs, 383 based on Foata normal form. 12/1789 useless extension candidates. Maximal degree in co-relation 1640. Up to 1321 conditions per place. [2024-11-10 17:46:51,991 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 57 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-10 17:46:51,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 351 flow [2024-11-10 17:46:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:46:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:46:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-10 17:46:51,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6229508196721312 [2024-11-10 17:46:51,993 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 178 flow. Second operand 3 states and 114 transitions. [2024-11-10 17:46:51,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 351 flow [2024-11-10 17:46:51,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 343 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-10 17:46:51,999 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 184 flow [2024-11-10 17:46:51,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-11-10 17:46:52,002 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-11-10 17:46:52,002 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 184 flow [2024-11-10 17:46:52,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 17:46:52,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:52,003 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:52,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 17:46:52,003 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:52,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2053729933, now seen corresponding path program 1 times [2024-11-10 17:46:52,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:52,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931301879] [2024-11-10 17:46:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:52,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:52,872 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 17:46:52,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931301879] [2024-11-10 17:46:52,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931301879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:46:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792650412] [2024-11-10 17:46:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:52,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:46:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:46:52,876 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 17:46:52,877 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 17:46:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:53,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 17:46:53,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:46:53,537 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 17:46:53,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:46:53,731 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 17:46:53,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792650412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:46:53,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:46:53,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-10 17:46:53,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535465034] [2024-11-10 17:46:53,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:46:53,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 17:46:53,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 17:46:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-10 17:46:53,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:46:53,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 184 flow. Second operand has 15 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 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 17:46:53,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:53,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:46:53,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:55,744 INFO L124 PetriNetUnfolderBase]: 4128/8140 cut-off events. [2024-11-10 17:46:55,744 INFO L125 PetriNetUnfolderBase]: For 1944/1944 co-relation queries the response was YES. [2024-11-10 17:46:55,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18019 conditions, 8140 events. 4128/8140 cut-off events. For 1944/1944 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 57859 event pairs, 309 based on Foata normal form. 192/7738 useless extension candidates. Maximal degree in co-relation 7330. Up to 1425 conditions per place. [2024-11-10 17:46:55,807 INFO L140 encePairwiseOnDemand]: 53/61 looper letters, 333 selfloop transitions, 45 changer transitions 0/395 dead transitions. [2024-11-10 17:46:55,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 395 transitions, 1875 flow [2024-11-10 17:46:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-10 17:46:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-10 17:46:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 751 transitions. [2024-11-10 17:46:55,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6155737704918033 [2024-11-10 17:46:55,811 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 184 flow. Second operand 20 states and 751 transitions. [2024-11-10 17:46:55,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 395 transitions, 1875 flow [2024-11-10 17:46:55,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 395 transitions, 1870 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:46:55,824 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 600 flow [2024-11-10 17:46:55,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=600, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-11-10 17:46:55,825 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-11-10 17:46:55,825 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 600 flow [2024-11-10 17:46:55,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 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 17:46:55,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:55,826 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:55,848 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 17:46:56,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:46:56,031 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:56,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1399132436, now seen corresponding path program 1 times [2024-11-10 17:46:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:56,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605335690] [2024-11-10 17:46:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:56,336 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 17:46:56,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:56,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605335690] [2024-11-10 17:46:56,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605335690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:56,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:56,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:46:56,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141996592] [2024-11-10 17:46:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:56,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:46:56,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:46:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:46:56,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-10 17:46:56,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 600 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 17:46:56,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:56,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-10 17:46:56,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:56,992 INFO L124 PetriNetUnfolderBase]: 1833/4040 cut-off events. [2024-11-10 17:46:56,993 INFO L125 PetriNetUnfolderBase]: For 2160/2160 co-relation queries the response was YES. [2024-11-10 17:46:57,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9481 conditions, 4040 events. 1833/4040 cut-off events. For 2160/2160 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 26381 event pairs, 372 based on Foata normal form. 234/4083 useless extension candidates. Maximal degree in co-relation 9279. Up to 2311 conditions per place. [2024-11-10 17:46:57,032 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 71 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2024-11-10 17:46:57,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 617 flow [2024-11-10 17:46:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:46:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:46:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-11-10 17:46:57,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5683060109289617 [2024-11-10 17:46:57,036 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 600 flow. Second operand 3 states and 104 transitions. [2024-11-10 17:46:57,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 617 flow [2024-11-10 17:46:57,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 569 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-11-10 17:46:57,054 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 397 flow [2024-11-10 17:46:57,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-11-10 17:46:57,055 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 33 predicate places. [2024-11-10 17:46:57,056 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 397 flow [2024-11-10 17:46:57,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 17:46:57,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:57,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:57,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 17:46:57,057 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:57,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:57,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1159008334, now seen corresponding path program 1 times [2024-11-10 17:46:57,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:57,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772310608] [2024-11-10 17:46:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:57,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:57,370 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 17:46:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772310608] [2024-11-10 17:46:57,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772310608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:57,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:57,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 17:46:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560779346] [2024-11-10 17:46:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:57,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:46:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:57,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:46:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:46:57,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:46:57,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:46:57,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:57,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:46:57,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:57,981 INFO L124 PetriNetUnfolderBase]: 1838/4068 cut-off events. [2024-11-10 17:46:57,981 INFO L125 PetriNetUnfolderBase]: For 1419/1419 co-relation queries the response was YES. [2024-11-10 17:46:58,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9637 conditions, 4068 events. 1838/4068 cut-off events. For 1419/1419 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 26880 event pairs, 1002 based on Foata normal form. 0/3893 useless extension candidates. Maximal degree in co-relation 8130. Up to 2176 conditions per place. [2024-11-10 17:46:58,016 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 57 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-11-10 17:46:58,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 573 flow [2024-11-10 17:46:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:46:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:46:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-10 17:46:58,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2024-11-10 17:46:58,018 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 397 flow. Second operand 5 states and 138 transitions. [2024-11-10 17:46:58,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 573 flow [2024-11-10 17:46:58,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:46:58,028 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 427 flow [2024-11-10 17:46:58,028 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-11-10 17:46:58,029 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-11-10 17:46:58,029 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 427 flow [2024-11-10 17:46:58,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:46:58,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:58,030 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:58,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 17:46:58,030 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:58,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:58,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1521130671, now seen corresponding path program 1 times [2024-11-10 17:46:58,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:58,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024679272] [2024-11-10 17:46:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:58,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:59,000 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 17:46:59,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:59,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024679272] [2024-11-10 17:46:59,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024679272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:59,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:59,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 17:46:59,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899238993] [2024-11-10 17:46:59,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:59,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 17:46:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 17:46:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-10 17:46:59,032 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:46:59,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 427 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 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 17:46:59,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:59,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:46:59,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:46:59,593 INFO L124 PetriNetUnfolderBase]: 1959/4198 cut-off events. [2024-11-10 17:46:59,594 INFO L125 PetriNetUnfolderBase]: For 2045/2045 co-relation queries the response was YES. [2024-11-10 17:46:59,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10109 conditions, 4198 events. 1959/4198 cut-off events. For 2045/2045 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 27440 event pairs, 461 based on Foata normal form. 0/3999 useless extension candidates. Maximal degree in co-relation 8583. Up to 2951 conditions per place. [2024-11-10 17:46:59,630 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 112 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2024-11-10 17:46:59,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 137 transitions, 839 flow [2024-11-10 17:46:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 17:46:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 17:46:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-11-10 17:46:59,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5020491803278688 [2024-11-10 17:46:59,632 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 427 flow. Second operand 8 states and 245 transitions. [2024-11-10 17:46:59,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 137 transitions, 839 flow [2024-11-10 17:46:59,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 137 transitions, 795 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 17:46:59,643 INFO L231 Difference]: Finished difference. Result has 95 places, 86 transitions, 450 flow [2024-11-10 17:46:59,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=450, PETRI_PLACES=95, PETRI_TRANSITIONS=86} [2024-11-10 17:46:59,645 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2024-11-10 17:46:59,645 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 86 transitions, 450 flow [2024-11-10 17:46:59,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 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 17:46:59,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:46:59,645 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:46:59,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 17:46:59,646 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:46:59,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:46:59,646 INFO L85 PathProgramCache]: Analyzing trace with hash 384188165, now seen corresponding path program 1 times [2024-11-10 17:46:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:46:59,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446909497] [2024-11-10 17:46:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:46:59,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:46:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:46:59,934 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 17:46:59,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:46:59,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446909497] [2024-11-10 17:46:59,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446909497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:46:59,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:46:59,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 17:46:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721407516] [2024-11-10 17:46:59,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:46:59,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 17:46:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:46:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 17:46:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 17:46:59,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-10 17:46:59,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 86 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 17:46:59,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:46:59,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-10 17:46:59,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:00,584 INFO L124 PetriNetUnfolderBase]: 2280/4973 cut-off events. [2024-11-10 17:47:00,585 INFO L125 PetriNetUnfolderBase]: For 2137/2137 co-relation queries the response was YES. [2024-11-10 17:47:00,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12114 conditions, 4973 events. 2280/4973 cut-off events. For 2137/2137 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 34555 event pairs, 386 based on Foata normal form. 56/4847 useless extension candidates. Maximal degree in co-relation 10249. Up to 1920 conditions per place. [2024-11-10 17:47:00,627 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 108 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2024-11-10 17:47:00,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 910 flow [2024-11-10 17:47:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 17:47:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 17:47:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-10 17:47:00,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5540983606557377 [2024-11-10 17:47:00,629 INFO L175 Difference]: Start difference. First operand has 95 places, 86 transitions, 450 flow. Second operand 5 states and 169 transitions. [2024-11-10 17:47:00,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 910 flow [2024-11-10 17:47:00,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 899 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-10 17:47:00,643 INFO L231 Difference]: Finished difference. Result has 98 places, 91 transitions, 517 flow [2024-11-10 17:47:00,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=517, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2024-11-10 17:47:00,644 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2024-11-10 17:47:00,644 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 517 flow [2024-11-10 17:47:00,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 17:47:00,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:00,645 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:00,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 17:47:00,645 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:47:00,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1847997497, now seen corresponding path program 1 times [2024-11-10 17:47:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778652096] [2024-11-10 17:47:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:00,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:02,540 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 17:47:02,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778652096] [2024-11-10 17:47:02,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778652096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:02,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:02,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-10 17:47:02,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164370661] [2024-11-10 17:47:02,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:02,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 17:47:02,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 17:47:02,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-10 17:47:02,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-10 17:47:02,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 91 transitions, 517 flow. Second operand has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 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 17:47:02,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:02,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-10 17:47:02,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:04,248 INFO L124 PetriNetUnfolderBase]: 4238/9302 cut-off events. [2024-11-10 17:47:04,248 INFO L125 PetriNetUnfolderBase]: For 6580/6580 co-relation queries the response was YES. [2024-11-10 17:47:04,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23198 conditions, 9302 events. 4238/9302 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 73408 event pairs, 1017 based on Foata normal form. 0/8977 useless extension candidates. Maximal degree in co-relation 19362. Up to 3469 conditions per place. [2024-11-10 17:47:04,333 INFO L140 encePairwiseOnDemand]: 51/61 looper letters, 203 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-11-10 17:47:04,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 249 transitions, 1735 flow [2024-11-10 17:47:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 17:47:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 17:47:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 384 transitions. [2024-11-10 17:47:04,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5245901639344263 [2024-11-10 17:47:04,336 INFO L175 Difference]: Start difference. First operand has 98 places, 91 transitions, 517 flow. Second operand 12 states and 384 transitions. [2024-11-10 17:47:04,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 249 transitions, 1735 flow [2024-11-10 17:47:04,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 249 transitions, 1733 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:47:04,368 INFO L231 Difference]: Finished difference. Result has 113 places, 112 transitions, 780 flow [2024-11-10 17:47:04,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=780, PETRI_PLACES=113, PETRI_TRANSITIONS=112} [2024-11-10 17:47:04,369 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2024-11-10 17:47:04,369 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 112 transitions, 780 flow [2024-11-10 17:47:04,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 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 17:47:04,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:04,370 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:04,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 17:47:04,370 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:47:04,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash 277520599, now seen corresponding path program 1 times [2024-11-10 17:47:04,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:04,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787901936] [2024-11-10 17:47:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:04,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:04,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787901936] [2024-11-10 17:47:04,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787901936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:04,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:04,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 17:47:04,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821899065] [2024-11-10 17:47:04,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:04,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:04,541 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:47:04,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 112 transitions, 780 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 17:47:04,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:04,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:47:04,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:06,091 INFO L124 PetriNetUnfolderBase]: 6303/13634 cut-off events. [2024-11-10 17:47:06,091 INFO L125 PetriNetUnfolderBase]: For 12814/12814 co-relation queries the response was YES. [2024-11-10 17:47:06,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35713 conditions, 13634 events. 6303/13634 cut-off events. For 12814/12814 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 112465 event pairs, 4136 based on Foata normal form. 137/13447 useless extension candidates. Maximal degree in co-relation 29281. Up to 9135 conditions per place. [2024-11-10 17:47:06,208 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 153 selfloop transitions, 2 changer transitions 0/171 dead transitions. [2024-11-10 17:47:06,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 171 transitions, 1524 flow [2024-11-10 17:47:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-10 17:47:06,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6229508196721312 [2024-11-10 17:47:06,211 INFO L175 Difference]: Start difference. First operand has 113 places, 112 transitions, 780 flow. Second operand 3 states and 114 transitions. [2024-11-10 17:47:06,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 171 transitions, 1524 flow [2024-11-10 17:47:06,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 171 transitions, 1498 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-10 17:47:06,273 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 774 flow [2024-11-10 17:47:06,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=774, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2024-11-10 17:47:06,275 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-11-10 17:47:06,275 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 774 flow [2024-11-10 17:47:06,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 17:47:06,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:06,276 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:06,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 17:47:06,276 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:47:06,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2112331716, now seen corresponding path program 1 times [2024-11-10 17:47:06,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:06,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575453780] [2024-11-10 17:47:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:07,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575453780] [2024-11-10 17:47:07,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575453780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:47:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446025926] [2024-11-10 17:47:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:07,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:47:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:47:07,054 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 17:47:07,055 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 17:47:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:07,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-10 17:47:07,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 17:47:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:07,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 17:47:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:07,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446025926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 17:47:07,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 17:47:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-10 17:47:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136410769] [2024-11-10 17:47:07,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 17:47:07,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 17:47:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 17:47:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-10 17:47:08,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-10 17:47:08,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 774 flow. Second operand has 19 states, 19 states have (on average 22.94736842105263) internal successors, (436), 19 states have internal predecessors, (436), 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 17:47:08,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:08,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-10 17:47:08,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:11,731 INFO L124 PetriNetUnfolderBase]: 10597/22988 cut-off events. [2024-11-10 17:47:11,732 INFO L125 PetriNetUnfolderBase]: For 23283/23283 co-relation queries the response was YES. [2024-11-10 17:47:11,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63390 conditions, 22988 events. 10597/22988 cut-off events. For 23283/23283 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 206812 event pairs, 1775 based on Foata normal form. 181/22624 useless extension candidates. Maximal degree in co-relation 39479. Up to 3410 conditions per place. [2024-11-10 17:47:11,976 INFO L140 encePairwiseOnDemand]: 51/61 looper letters, 386 selfloop transitions, 95 changer transitions 0/497 dead transitions. [2024-11-10 17:47:11,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 497 transitions, 3765 flow [2024-11-10 17:47:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-10 17:47:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-10 17:47:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 746 transitions. [2024-11-10 17:47:11,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.555886736214605 [2024-11-10 17:47:11,979 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 774 flow. Second operand 22 states and 746 transitions. [2024-11-10 17:47:11,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 497 transitions, 3765 flow [2024-11-10 17:47:12,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 497 transitions, 3743 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 17:47:12,075 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 1739 flow [2024-11-10 17:47:12,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1739, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2024-11-10 17:47:12,076 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-11-10 17:47:12,077 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 1739 flow [2024-11-10 17:47:12,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.94736842105263) internal successors, (436), 19 states have internal predecessors, (436), 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 17:47:12,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:12,077 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:12,099 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 17:47:12,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 17:47:12,278 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-10 17:47:12,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1583679977, now seen corresponding path program 1 times [2024-11-10 17:47:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811043852] [2024-11-10 17:47:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:12,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811043852] [2024-11-10 17:47:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811043852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 17:47:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525748616] [2024-11-10 17:47:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 17:47:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:47:12,765 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 17:47:12,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process