./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:46:35,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:46:35,202 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:46:35,205 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:46:35,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:46:35,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:46:35,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:46:35,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:46:35,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:46:35,221 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:46:35,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:46:35,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:46:35,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:46:35,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:46:35,223 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:46:35,223 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:46:35,223 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:46:35,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:46:35,224 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:46:35,224 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:46:35,224 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:46:35,225 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:46:35,225 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:46:35,225 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:46:35,225 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:46:35,226 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:46:35,226 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:46:35,226 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:46:35,226 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:46:35,227 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:46:35,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:46:35,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:46:35,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:46:35,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:46:35,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:46:35,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:46:35,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:46:35,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:46:35,229 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:46:35,229 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:46:35,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:46:35,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:46:35,229 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2024-10-11 19:46:35,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:46:35,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:46:35,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:46:35,432 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:46:35,432 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:46:35,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2024-10-11 19:46:36,770 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:46:36,991 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:46:36,992 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2024-10-11 19:46:37,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/672a0d80a/5ec1ef00ca1740aba608a40a82beccb2/FLAG5d9b21b42 [2024-10-11 19:46:37,338 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/672a0d80a/5ec1ef00ca1740aba608a40a82beccb2 [2024-10-11 19:46:37,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:46:37,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:46:37,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:46:37,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:46:37,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:46:37,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad50a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37, skipping insertion in model container [2024-10-11 19:46:37,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,393 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:46:37,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:46:37,730 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:46:37,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:46:37,825 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:46:37,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37 WrapperNode [2024-10-11 19:46:37,826 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:46:37,827 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:46:37,827 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:46:37,827 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:46:37,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,847 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,864 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2024-10-11 19:46:37,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:46:37,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:46:37,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:46:37,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:46:37,878 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,880 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,896 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 5, 6, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 5, 1, 0]. The 3 writes are split as follows [0, 0, 0, 2, 1]. [2024-10-11 19:46:37,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:46:37,921 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:46:37,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:46:37,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:46:37,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (1/1) ... [2024-10-11 19:46:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:46:37,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:46:37,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:46:37,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:46:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:46:38,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:46:38,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:46:38,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:46:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:46:38,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:46:38,068 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 19:46:38,068 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 19:46:38,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:46:38,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:46:38,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:46:38,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:46:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 19:46:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-11 19:46:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:46:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:46:38,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:46:38,071 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:46:38,207 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:46:38,208 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:46:38,413 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:46:38,413 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:46:38,572 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:46:38,573 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-11 19:46:38,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:46:38 BoogieIcfgContainer [2024-10-11 19:46:38,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:46:38,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:46:38,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:46:38,578 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:46:38,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:46:37" (1/3) ... [2024-10-11 19:46:38,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6374c55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:46:38, skipping insertion in model container [2024-10-11 19:46:38,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:46:37" (2/3) ... [2024-10-11 19:46:38,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6374c55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:46:38, skipping insertion in model container [2024-10-11 19:46:38,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:46:38" (3/3) ... [2024-10-11 19:46:38,580 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2024-10-11 19:46:38,596 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:46:38,597 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-11 19:46:38,597 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:46:38,640 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-11 19:46:38,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 75 transitions, 157 flow [2024-10-11 19:46:38,709 INFO L124 PetriNetUnfolderBase]: 15/109 cut-off events. [2024-10-11 19:46:38,709 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:46:38,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 15/109 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 469 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2024-10-11 19:46:38,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 75 transitions, 157 flow [2024-10-11 19:46:38,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 75 transitions, 157 flow [2024-10-11 19:46:38,724 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:46:38,730 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;@58c20ff9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:46:38,730 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-10-11 19:46:38,732 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:46:38,733 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:46:38,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:46:38,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:38,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:38,735 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-11 19:46:38,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash 382236, now seen corresponding path program 1 times [2024-10-11 19:46:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:38,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11389592] [2024-10-11 19:46:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:39,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:39,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11389592] [2024-10-11 19:46:39,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11389592] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:39,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:39,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133571913] [2024-10-11 19:46:39,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:39,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:39,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:39,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-10-11 19:46:39,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2024-10-11 19:46:39,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:39,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-10-11 19:46:39,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:39,334 INFO L124 PetriNetUnfolderBase]: 181/672 cut-off events. [2024-10-11 19:46:39,334 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:46:39,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 672 events. 181/672 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3942 event pairs, 156 based on Foata normal form. 105/709 useless extension candidates. Maximal degree in co-relation 1026. Up to 353 conditions per place. [2024-10-11 19:46:39,344 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-10-11 19:46:39,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 241 flow [2024-10-11 19:46:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2024-10-11 19:46:39,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6844444444444444 [2024-10-11 19:46:39,358 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 157 flow. Second operand 3 states and 154 transitions. [2024-10-11 19:46:39,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 241 flow [2024-10-11 19:46:39,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 241 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:46:39,365 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 135 flow [2024-10-11 19:46:39,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-10-11 19:46:39,373 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-10-11 19:46:39,373 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 135 flow [2024-10-11 19:46:39,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2024-10-11 19:46:39,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:39,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:39,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:46:39,374 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-11 19:46:39,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash 382237, now seen corresponding path program 1 times [2024-10-11 19:46:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822231177] [2024-10-11 19:46:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:39,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:39,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822231177] [2024-10-11 19:46:39,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822231177] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:39,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:39,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791026083] [2024-10-11 19:46:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:39,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:39,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-10-11 19:46:39,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-10-11 19:46:39,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:39,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-10-11 19:46:39,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:39,671 INFO L124 PetriNetUnfolderBase]: 168/586 cut-off events. [2024-10-11 19:46:39,671 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:46:39,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 586 events. 168/586 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3390 event pairs, 0 based on Foata normal form. 1/535 useless extension candidates. Maximal degree in co-relation 936. Up to 355 conditions per place. [2024-10-11 19:46:39,675 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-10-11 19:46:39,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 247 flow [2024-10-11 19:46:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-10-11 19:46:39,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-10-11 19:46:39,677 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 135 flow. Second operand 3 states and 147 transitions. [2024-10-11 19:46:39,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 247 flow [2024-10-11 19:46:39,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:46:39,680 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 141 flow [2024-10-11 19:46:39,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-10-11 19:46:39,681 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-10-11 19:46:39,681 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 141 flow [2024-10-11 19:46:39,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-10-11 19:46:39,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:39,681 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:46:39,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:46:39,682 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-11 19:46:39,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:39,682 INFO L85 PathProgramCache]: Analyzing trace with hash 827678475, now seen corresponding path program 1 times [2024-10-11 19:46:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:39,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420595340] [2024-10-11 19:46:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:39,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:39,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420595340] [2024-10-11 19:46:39,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420595340] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:46:39,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173269825] [2024-10-11 19:46:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:39,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:46:39,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:46:39,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:46:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:39,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:46:39,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:46:39,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:46:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:40,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:46:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173269825] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:46:40,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:46:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:46:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341921465] [2024-10-11 19:46:40,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:46:40,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:46:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:46:40,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:46:40,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 75 [2024-10-11 19:46:40,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 141 flow. Second operand has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 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) [2024-10-11 19:46:40,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:40,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 75 [2024-10-11 19:46:40,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:40,345 INFO L124 PetriNetUnfolderBase]: 36/121 cut-off events. [2024-10-11 19:46:40,345 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-11 19:46:40,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 121 events. 36/121 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 352 event pairs, 0 based on Foata normal form. 26/139 useless extension candidates. Maximal degree in co-relation 217. Up to 75 conditions per place. [2024-10-11 19:46:40,346 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 29 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-10-11 19:46:40,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 170 flow [2024-10-11 19:46:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:46:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:46:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2024-10-11 19:46:40,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-11 19:46:40,347 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 141 flow. Second operand 4 states and 165 transitions. [2024-10-11 19:46:40,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 170 flow [2024-10-11 19:46:40,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:46:40,349 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 78 flow [2024-10-11 19:46:40,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-10-11 19:46:40,349 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -26 predicate places. [2024-10-11 19:46:40,350 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 78 flow [2024-10-11 19:46:40,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 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) [2024-10-11 19:46:40,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:40,352 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-11 19:46:40,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:46:40,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:40,557 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-11 19:46:40,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash -111770690, now seen corresponding path program 1 times [2024-10-11 19:46:40,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:40,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783066708] [2024-10-11 19:46:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:40,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:40,576 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:46:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:40,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:46:40,603 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:46:40,604 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-10-11 19:46:40,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2024-10-11 19:46:40,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2024-10-11 19:46:40,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2024-10-11 19:46:40,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2024-10-11 19:46:40,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2024-10-11 19:46:40,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2024-10-11 19:46:40,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2024-10-11 19:46:40,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2024-10-11 19:46:40,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2024-10-11 19:46:40,608 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2024-10-11 19:46:40,608 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2024-10-11 19:46:40,608 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2024-10-11 19:46:40,608 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2024-10-11 19:46:40,608 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2024-10-11 19:46:40,608 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2024-10-11 19:46:40,608 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2024-10-11 19:46:40,609 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2024-10-11 19:46:40,609 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2024-10-11 19:46:40,609 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2024-10-11 19:46:40,609 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2024-10-11 19:46:40,609 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2024-10-11 19:46:40,609 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2024-10-11 19:46:40,610 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2024-10-11 19:46:40,610 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2024-10-11 19:46:40,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:46:40,610 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 19:46:40,612 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:46:40,612 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:46:40,635 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:46:40,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 112 transitions, 240 flow [2024-10-11 19:46:40,652 INFO L124 PetriNetUnfolderBase]: 27/192 cut-off events. [2024-10-11 19:46:40,653 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:46:40,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 192 events. 27/192 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 938 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2024-10-11 19:46:40,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 112 transitions, 240 flow [2024-10-11 19:46:40,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 112 transitions, 240 flow [2024-10-11 19:46:40,659 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:46:40,660 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;@58c20ff9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:46:40,661 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-10-11 19:46:40,663 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:46:40,663 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:46:40,663 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:46:40,663 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:40,663 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:40,664 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-11 19:46:40,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash 493452, now seen corresponding path program 1 times [2024-10-11 19:46:40,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:40,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585243761] [2024-10-11 19:46:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:40,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585243761] [2024-10-11 19:46:40,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585243761] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:40,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:40,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:40,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355338525] [2024-10-11 19:46:40,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:40,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:40,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 112 [2024-10-11 19:46:40,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2024-10-11 19:46:40,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:40,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 112 [2024-10-11 19:46:40,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:41,846 INFO L124 PetriNetUnfolderBase]: 5103/11295 cut-off events. [2024-10-11 19:46:41,846 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-10-11 19:46:41,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 11295 events. 5103/11295 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 98094 event pairs, 4416 based on Foata normal form. 2239/12636 useless extension candidates. Maximal degree in co-relation 12477. Up to 7045 conditions per place. [2024-10-11 19:46:41,920 INFO L140 encePairwiseOnDemand]: 92/112 looper letters, 67 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-10-11 19:46:41,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 117 transitions, 388 flow [2024-10-11 19:46:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2024-10-11 19:46:41,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7232142857142857 [2024-10-11 19:46:41,926 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 240 flow. Second operand 3 states and 243 transitions. [2024-10-11 19:46:41,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 117 transitions, 388 flow [2024-10-11 19:46:41,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 117 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:46:41,933 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 206 flow [2024-10-11 19:46:41,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-10-11 19:46:41,935 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-10-11 19:46:41,936 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 206 flow [2024-10-11 19:46:41,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2024-10-11 19:46:41,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:41,936 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:41,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:46:41,937 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-11 19:46:41,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash 493453, now seen corresponding path program 1 times [2024-10-11 19:46:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:41,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858519754] [2024-10-11 19:46:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:41,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:42,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:42,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858519754] [2024-10-11 19:46:42,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858519754] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:42,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:42,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:42,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281021875] [2024-10-11 19:46:42,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:42,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:42,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:42,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 112 [2024-10-11 19:46:42,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2024-10-11 19:46:42,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:42,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 112 [2024-10-11 19:46:42,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:42,952 INFO L124 PetriNetUnfolderBase]: 4766/11141 cut-off events. [2024-10-11 19:46:42,953 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-10-11 19:46:42,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18979 conditions, 11141 events. 4766/11141 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 101443 event pairs, 2232 based on Foata normal form. 1/10124 useless extension candidates. Maximal degree in co-relation 16425. Up to 7553 conditions per place. [2024-10-11 19:46:43,026 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 56 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2024-10-11 19:46:43,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 350 flow [2024-10-11 19:46:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:46:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:46:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2024-10-11 19:46:43,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-10-11 19:46:43,028 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 206 flow. Second operand 3 states and 213 transitions. [2024-10-11 19:46:43,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 350 flow [2024-10-11 19:46:43,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 107 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:46:43,041 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 216 flow [2024-10-11 19:46:43,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2024-10-11 19:46:43,042 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2024-10-11 19:46:43,042 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 216 flow [2024-10-11 19:46:43,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2024-10-11 19:46:43,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:43,043 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:46:43,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:46:43,043 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-11 19:46:43,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash 463265400, now seen corresponding path program 1 times [2024-10-11 19:46:43,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:43,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596513640] [2024-10-11 19:46:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:43,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:43,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596513640] [2024-10-11 19:46:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596513640] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:46:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136033541] [2024-10-11 19:46:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:46:43,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:46:43,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:46:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:43,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:46:43,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:46:43,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:46:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:43,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:46:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:43,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136033541] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:46:43,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:46:43,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:46:43,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764259338] [2024-10-11 19:46:43,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:46:43,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:46:43,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:46:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:46:43,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 112 [2024-10-11 19:46:43,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 216 flow. Second operand has 9 states, 9 states have (on average 52.333333333333336) internal successors, (471), 9 states have internal predecessors, (471), 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) [2024-10-11 19:46:43,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:43,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 112 [2024-10-11 19:46:43,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:43,837 INFO L124 PetriNetUnfolderBase]: 1128/2617 cut-off events. [2024-10-11 19:46:43,838 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-10-11 19:46:43,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4719 conditions, 2617 events. 1128/2617 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 17961 event pairs, 260 based on Foata normal form. 364/2791 useless extension candidates. Maximal degree in co-relation 366. Up to 1443 conditions per place. [2024-10-11 19:46:43,848 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 68 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2024-10-11 19:46:43,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 106 transitions, 372 flow [2024-10-11 19:46:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:46:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:46:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2024-10-11 19:46:43,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-10-11 19:46:43,853 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 216 flow. Second operand 5 states and 325 transitions. [2024-10-11 19:46:43,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 106 transitions, 372 flow [2024-10-11 19:46:43,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:46:43,856 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 154 flow [2024-10-11 19:46:43,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-10-11 19:46:43,856 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -23 predicate places. [2024-10-11 19:46:43,856 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 154 flow [2024-10-11 19:46:43,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 52.333333333333336) internal successors, (471), 9 states have internal predecessors, (471), 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) [2024-10-11 19:46:43,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:43,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:46:43,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 19:46:44,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:46:44,059 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-11 19:46:44,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash 421424428, now seen corresponding path program 1 times [2024-10-11 19:46:44,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:44,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469508038] [2024-10-11 19:46:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:44,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:44,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469508038] [2024-10-11 19:46:44,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469508038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:44,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:44,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:46:44,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46518323] [2024-10-11 19:46:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:44,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:46:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:46:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:46:44,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 112 [2024-10-11 19:46:44,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 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) [2024-10-11 19:46:44,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:44,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 112 [2024-10-11 19:46:44,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:44,424 INFO L124 PetriNetUnfolderBase]: 1128/2656 cut-off events. [2024-10-11 19:46:44,425 INFO L125 PetriNetUnfolderBase]: For 580/580 co-relation queries the response was YES. [2024-10-11 19:46:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4928 conditions, 2656 events. 1128/2656 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17937 event pairs, 36 based on Foata normal form. 0/2628 useless extension candidates. Maximal degree in co-relation 4592. Up to 1764 conditions per place. [2024-10-11 19:46:44,437 INFO L140 encePairwiseOnDemand]: 106/112 looper letters, 46 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-10-11 19:46:44,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 289 flow [2024-10-11 19:46:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:46:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:46:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-10-11 19:46:44,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2024-10-11 19:46:44,439 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 154 flow. Second operand 4 states and 230 transitions. [2024-10-11 19:46:44,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 289 flow [2024-10-11 19:46:44,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 278 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-11 19:46:44,441 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 143 flow [2024-10-11 19:46:44,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-10-11 19:46:44,442 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -27 predicate places. [2024-10-11 19:46:44,442 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 143 flow [2024-10-11 19:46:44,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 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) [2024-10-11 19:46:44,442 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:44,442 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:46:44,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:46:44,443 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-11 19:46:44,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 421424429, now seen corresponding path program 1 times [2024-10-11 19:46:44,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:44,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427931118] [2024-10-11 19:46:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:44,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:44,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427931118] [2024-10-11 19:46:44,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427931118] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:44,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:44,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:46:44,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970341092] [2024-10-11 19:46:44,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:44,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:46:44,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:46:44,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:46:44,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 112 [2024-10-11 19:46:44,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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) [2024-10-11 19:46:44,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:44,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 112 [2024-10-11 19:46:44,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:44,774 INFO L124 PetriNetUnfolderBase]: 804/1785 cut-off events. [2024-10-11 19:46:44,774 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-10-11 19:46:44,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1785 events. 804/1785 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10543 event pairs, 24 based on Foata normal form. 0/1764 useless extension candidates. Maximal degree in co-relation 3159. Up to 1284 conditions per place. [2024-10-11 19:46:44,781 INFO L140 encePairwiseOnDemand]: 106/112 looper letters, 44 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-10-11 19:46:44,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 74 transitions, 268 flow [2024-10-11 19:46:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:46:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:46:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2024-10-11 19:46:44,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-10-11 19:46:44,783 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 143 flow. Second operand 4 states and 236 transitions. [2024-10-11 19:46:44,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 74 transitions, 268 flow [2024-10-11 19:46:44,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:46:44,784 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 136 flow [2024-10-11 19:46:44,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-10-11 19:46:44,785 INFO L277 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2024-10-11 19:46:44,785 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 136 flow [2024-10-11 19:46:44,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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) [2024-10-11 19:46:44,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:44,786 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-11 19:46:44,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:46:44,786 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-11 19:46:44,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2090840582, now seen corresponding path program 1 times [2024-10-11 19:46:44,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:44,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905340329] [2024-10-11 19:46:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:44,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:44,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:46:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:46:44,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:46:44,809 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:46:44,810 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2024-10-11 19:46:44,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2024-10-11 19:46:44,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2024-10-11 19:46:44,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2024-10-11 19:46:44,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2024-10-11 19:46:44,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2024-10-11 19:46:44,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2024-10-11 19:46:44,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2024-10-11 19:46:44,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2024-10-11 19:46:44,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2024-10-11 19:46:44,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2024-10-11 19:46:44,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2024-10-11 19:46:44,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2024-10-11 19:46:44,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2024-10-11 19:46:44,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2024-10-11 19:46:44,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2024-10-11 19:46:44,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2024-10-11 19:46:44,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:46:44,815 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-10-11 19:46:44,815 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:46:44,815 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:46:44,837 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 19:46:44,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 149 transitions, 325 flow [2024-10-11 19:46:44,856 INFO L124 PetriNetUnfolderBase]: 42/296 cut-off events. [2024-10-11 19:46:44,856 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 19:46:44,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 296 events. 42/296 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1537 event pairs, 1 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2024-10-11 19:46:44,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 149 transitions, 325 flow [2024-10-11 19:46:44,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 149 transitions, 325 flow [2024-10-11 19:46:44,861 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:46:44,862 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;@58c20ff9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:46:44,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-10-11 19:46:44,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:46:44,863 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:46:44,863 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:46:44,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:44,863 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:46:44,863 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-11 19:46:44,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash 641409, now seen corresponding path program 1 times [2024-10-11 19:46:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:46:44,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059934454] [2024-10-11 19:46:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:46:44,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:46:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:46:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:46:44,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:46:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059934454] [2024-10-11 19:46:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059934454] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:46:44,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:46:44,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:46:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298137316] [2024-10-11 19:46:44,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:46:44,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:46:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:46:44,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:46:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:46:44,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 149 [2024-10-11 19:46:44,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-10-11 19:46:44,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:46:44,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 149 [2024-10-11 19:46:44,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:58,848 INFO L124 PetriNetUnfolderBase]: 104120/184328 cut-off events. [2024-10-11 19:46:58,849 INFO L125 PetriNetUnfolderBase]: For 1849/1849 co-relation queries the response was YES. [2024-10-11 19:46:59,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329840 conditions, 184328 events. 104120/184328 cut-off events. For 1849/1849 co-relation queries the response was YES. Maximal size of possible extension queue 3774. Compared 1918848 event pairs, 89797 based on Foata normal form. 41132/213596 useless extension candidates. Maximal degree in co-relation 145838. Up to 124602 conditions per place. [2024-10-11 19:47:00,407 INFO L140 encePairwiseOnDemand]: 123/149 looper letters, 93 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-10-11 19:47:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 160 transitions, 537 flow [2024-10-11 19:47:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2024-10-11 19:47:00,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7427293064876958 [2024-10-11 19:47:00,409 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 325 flow. Second operand 3 states and 332 transitions. [2024-10-11 19:47:00,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 160 transitions, 537 flow [2024-10-11 19:47:00,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 160 transitions, 537 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:47:00,415 INFO L231 Difference]: Finished difference. Result has 130 places, 124 transitions, 279 flow [2024-10-11 19:47:00,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2024-10-11 19:47:00,416 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, -1 predicate places. [2024-10-11 19:47:00,416 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 279 flow [2024-10-11 19:47:00,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-10-11 19:47:00,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:00,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:00,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 19:47:00,417 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-11 19:47:00,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash 641410, now seen corresponding path program 1 times [2024-10-11 19:47:00,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950049034] [2024-10-11 19:47:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:00,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950049034] [2024-10-11 19:47:00,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950049034] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:00,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:00,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:00,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275900115] [2024-10-11 19:47:00,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:00,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:00,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 149 [2024-10-11 19:47:00,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 124 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2024-10-11 19:47:00,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:00,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 149 [2024-10-11 19:47:00,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:14,130 INFO L124 PetriNetUnfolderBase]: 97063/178093 cut-off events. [2024-10-11 19:47:14,130 INFO L125 PetriNetUnfolderBase]: For 3845/3845 co-relation queries the response was YES. [2024-10-11 19:47:14,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316541 conditions, 178093 events. 97063/178093 cut-off events. For 3845/3845 co-relation queries the response was YES. Maximal size of possible extension queue 3811. Compared 1917282 event pairs, 63133 based on Foata normal form. 1/164955 useless extension candidates. Maximal degree in co-relation 270154. Up to 134378 conditions per place. [2024-10-11 19:47:15,605 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 70 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2024-10-11 19:47:15,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 138 transitions, 451 flow [2024-10-11 19:47:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-10-11 19:47:15,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6219239373601789 [2024-10-11 19:47:15,606 INFO L175 Difference]: Start difference. First operand has 130 places, 124 transitions, 279 flow. Second operand 3 states and 278 transitions. [2024-10-11 19:47:15,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 138 transitions, 451 flow [2024-10-11 19:47:16,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 138 transitions, 447 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:47:16,155 INFO L231 Difference]: Finished difference. Result has 131 places, 125 transitions, 289 flow [2024-10-11 19:47:16,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=131, PETRI_TRANSITIONS=125} [2024-10-11 19:47:16,156 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, 0 predicate places. [2024-10-11 19:47:16,156 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 125 transitions, 289 flow [2024-10-11 19:47:16,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2024-10-11 19:47:16,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:16,157 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:47:16,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 19:47:16,158 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-11 19:47:16,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:16,159 INFO L85 PathProgramCache]: Analyzing trace with hash -328661974, now seen corresponding path program 1 times [2024-10-11 19:47:16,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:16,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828000281] [2024-10-11 19:47:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:16,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:16,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828000281] [2024-10-11 19:47:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828000281] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:47:16,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219967291] [2024-10-11 19:47:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:16,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:16,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:16,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:47:16,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:47:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:16,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:47:16,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:47:16,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:47:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:16,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:47:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219967291] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:47:16,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:47:16,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:47:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437126500] [2024-10-11 19:47:16,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:47:16,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:47:16,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:47:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:47:16,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 149 [2024-10-11 19:47:16,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 125 transitions, 289 flow. Second operand has 9 states, 9 states have (on average 69.33333333333333) internal successors, (624), 9 states have internal predecessors, (624), 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) [2024-10-11 19:47:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 149 [2024-10-11 19:47:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:19,039 INFO L124 PetriNetUnfolderBase]: 23436/38393 cut-off events. [2024-10-11 19:47:19,039 INFO L125 PetriNetUnfolderBase]: For 9957/9957 co-relation queries the response was YES. [2024-10-11 19:47:19,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74465 conditions, 38393 events. 23436/38393 cut-off events. For 9957/9957 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 315131 event pairs, 1950 based on Foata normal form. 4758/41453 useless extension candidates. Maximal degree in co-relation 5835. Up to 24843 conditions per place. [2024-10-11 19:47:19,468 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 119 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2024-10-11 19:47:19,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 175 transitions, 624 flow [2024-10-11 19:47:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:47:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:47:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 531 transitions. [2024-10-11 19:47:19,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5939597315436241 [2024-10-11 19:47:19,471 INFO L175 Difference]: Start difference. First operand has 131 places, 125 transitions, 289 flow. Second operand 6 states and 531 transitions. [2024-10-11 19:47:19,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 175 transitions, 624 flow [2024-10-11 19:47:19,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 175 transitions, 620 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:47:19,477 INFO L231 Difference]: Finished difference. Result has 109 places, 97 transitions, 226 flow [2024-10-11 19:47:19,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=109, PETRI_TRANSITIONS=97} [2024-10-11 19:47:19,478 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, -22 predicate places. [2024-10-11 19:47:19,478 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 97 transitions, 226 flow [2024-10-11 19:47:19,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 69.33333333333333) internal successors, (624), 9 states have internal predecessors, (624), 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) [2024-10-11 19:47:19,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:19,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:47:19,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:47:19,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:19,680 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-11 19:47:19,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1446697692, now seen corresponding path program 1 times [2024-10-11 19:47:19,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:19,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256806042] [2024-10-11 19:47:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:19,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:19,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:19,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256806042] [2024-10-11 19:47:19,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256806042] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:19,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:47:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135091740] [2024-10-11 19:47:19,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:19,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:47:19,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:47:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:47:19,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 149 [2024-10-11 19:47:19,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 97 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2024-10-11 19:47:19,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:19,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 149 [2024-10-11 19:47:19,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:22,429 INFO L124 PetriNetUnfolderBase]: 23436/43256 cut-off events. [2024-10-11 19:47:22,430 INFO L125 PetriNetUnfolderBase]: For 7680/7680 co-relation queries the response was YES. [2024-10-11 19:47:22,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81526 conditions, 43256 events. 23436/43256 cut-off events. For 7680/7680 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 389358 event pairs, 13408 based on Foata normal form. 0/40957 useless extension candidates. Maximal degree in co-relation 81185. Up to 31092 conditions per place. [2024-10-11 19:47:22,918 INFO L140 encePairwiseOnDemand]: 143/149 looper letters, 74 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2024-10-11 19:47:22,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 454 flow [2024-10-11 19:47:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:47:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:47:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2024-10-11 19:47:22,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5436241610738255 [2024-10-11 19:47:22,920 INFO L175 Difference]: Start difference. First operand has 109 places, 97 transitions, 226 flow. Second operand 4 states and 324 transitions. [2024-10-11 19:47:22,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 454 flow [2024-10-11 19:47:22,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 124 transitions, 439 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 19:47:22,923 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 213 flow [2024-10-11 19:47:22,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2024-10-11 19:47:22,923 INFO L277 CegarLoopForPetriNet]: 131 programPoint places, -26 predicate places. [2024-10-11 19:47:22,923 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 213 flow [2024-10-11 19:47:22,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2024-10-11 19:47:22,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:22,924 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:47:22,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 19:47:22,924 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-10-11 19:47:22,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1446697691, now seen corresponding path program 1 times [2024-10-11 19:47:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:22,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363348660] [2024-10-11 19:47:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:23,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:23,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363348660] [2024-10-11 19:47:23,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363348660] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:23,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:23,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:47:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709152192] [2024-10-11 19:47:23,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:23,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:47:23,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:47:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:47:23,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 149 [2024-10-11 19:47:23,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 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) [2024-10-11 19:47:23,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:23,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 149 [2024-10-11 19:47:23,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand