./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:08:05,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:08:05,104 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:08:05,114 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:08:05,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:08:05,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:08:05,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:08:05,141 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:08:05,141 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:08:05,141 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:08:05,142 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:08:05,142 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:08:05,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:08:05,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:08:05,143 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:08:05,144 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:08:05,144 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:08:05,144 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:08:05,145 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:08:05,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:08:05,145 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:08:05,146 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:08:05,147 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:08:05,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:08:05,148 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:08:05,148 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:08:05,148 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:08:05,148 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:08:05,149 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:08:05,149 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:08:05,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:08:05,150 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:08:05,150 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:08:05,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:08:05,152 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:08:05,153 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:08:05,153 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:08:05,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:08:05,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:08:05,154 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:08:05,154 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:08:05,156 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:08:05,156 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df [2024-11-10 18:08:05,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:08:05,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:08:05,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:08:05,475 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:08:05,475 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:08:05,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2024-11-10 18:08:07,020 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:08:07,290 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:08:07,290 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2024-11-10 18:08:07,306 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/987126aee/e1f87df1c063409aa655c07401b3955d/FLAGcba89410e [2024-11-10 18:08:07,319 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/987126aee/e1f87df1c063409aa655c07401b3955d [2024-11-10 18:08:07,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:08:07,324 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:08:07,325 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:08:07,325 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:08:07,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:08:07,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:07,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a60871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07, skipping insertion in model container [2024-11-10 18:08:07,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:07,381 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:08:07,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:08:07,826 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:08:07,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:08:07,925 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:08:07,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07 WrapperNode [2024-11-10 18:08:07,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:08:07,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:08:07,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:08:07,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:08:07,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:07,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:07,986 INFO L138 Inliner]: procedures = 171, calls = 49, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2024-11-10 18:08:07,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:08:07,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:08:07,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:08:07,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:08:07,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:07,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,001 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,019 INFO L175 MemorySlicer]: Split 25 memory accesses to 6 slices as follows [2, 2, 5, 5, 5, 6]. 24 percent of accesses are in the largest equivalence class. The 18 initializations are split as follows [2, 0, 5, 5, 5, 1]. The 3 writes are split as follows [0, 1, 0, 0, 0, 2]. [2024-11-10 18:08:08,019 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,023 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,030 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,031 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:08:08,038 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:08:08,038 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:08:08,038 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:08:08,039 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (1/1) ... [2024-11-10 18:08:08,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:08:08,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:08:08,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:08:08,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:08:08,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:08:08,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:08:08,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:08:08,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-10 18:08:08,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-10 18:08:08,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-10 18:08:08,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:08:08,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:08:08,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:08:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-10 18:08:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-10 18:08:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-10 18:08:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:08:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:08:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 18:08:08,126 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:08:08,126 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:08:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 18:08:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:08:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:08:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:08:08,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-10 18:08:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-10 18:08:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-10 18:08:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:08:08,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:08:08,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:08:08,131 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:08:08,259 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:08:08,261 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:08:08,467 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L708: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-10 18:08:08,467 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L708-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-10 18:08:08,547 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:08:08,547 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:08:08,692 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:08:08,692 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:08:08,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:08:08 BoogieIcfgContainer [2024-11-10 18:08:08,693 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:08:08,695 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:08:08,695 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:08:08,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:08:08,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:08:07" (1/3) ... [2024-11-10 18:08:08,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf220ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:08:08, skipping insertion in model container [2024-11-10 18:08:08,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:07" (2/3) ... [2024-11-10 18:08:08,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf220ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:08:08, skipping insertion in model container [2024-11-10 18:08:08,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:08:08" (3/3) ... [2024-11-10 18:08:08,706 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2024-11-10 18:08:08,726 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:08:08,727 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-10 18:08:08,730 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:08:08,790 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-10 18:08:08,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 84 transitions, 175 flow [2024-11-10 18:08:08,883 INFO L124 PetriNetUnfolderBase]: 19/125 cut-off events. [2024-11-10 18:08:08,884 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:08:08,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 19/125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 512 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2024-11-10 18:08:08,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 84 transitions, 175 flow [2024-11-10 18:08:08,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 84 transitions, 175 flow [2024-11-10 18:08:08,913 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:08:08,923 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;@71d2a769, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:08:08,923 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-10 18:08:08,932 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:08:08,932 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:08:08,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:08:08,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:08,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:08,936 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:08:08,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash 10796008, now seen corresponding path program 1 times [2024-11-10 18:08:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:08,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714226737] [2024-11-10 18:08:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:09,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714226737] [2024-11-10 18:08:09,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714226737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:09,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:09,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:09,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393445072] [2024-11-10 18:08:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:09,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:09,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:09,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2024-11-10 18:08:09,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 84 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:09,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:09,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2024-11-10 18:08:09,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:09,655 INFO L124 PetriNetUnfolderBase]: 169/669 cut-off events. [2024-11-10 18:08:09,656 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:08:09,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 669 events. 169/669 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3994 event pairs, 144 based on Foata normal form. 171/777 useless extension candidates. Maximal degree in co-relation 994. Up to 327 conditions per place. [2024-11-10 18:08:09,664 INFO L140 encePairwiseOnDemand]: 68/84 looper letters, 40 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-11-10 18:08:09,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 253 flow [2024-11-10 18:08:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-11-10 18:08:09,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7103174603174603 [2024-11-10 18:08:09,681 INFO L175 Difference]: Start difference. First operand has 74 places, 84 transitions, 175 flow. Second operand 3 states and 179 transitions. [2024-11-10 18:08:09,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 253 flow [2024-11-10 18:08:09,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:08:09,690 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 149 flow [2024-11-10 18:08:09,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-10 18:08:09,698 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-10 18:08:09,698 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 149 flow [2024-11-10 18:08:09,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:09,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:09,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:09,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:08:09,699 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:08:09,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash 10796009, now seen corresponding path program 1 times [2024-11-10 18:08:09,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:09,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888294421] [2024-11-10 18:08:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:09,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:09,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:09,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888294421] [2024-11-10 18:08:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888294421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:09,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:09,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:09,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603154653] [2024-11-10 18:08:09,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:09,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:09,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-10 18:08:09,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:09,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:09,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-10 18:08:09,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:10,091 INFO L124 PetriNetUnfolderBase]: 180/675 cut-off events. [2024-11-10 18:08:10,091 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-10 18:08:10,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 675 events. 180/675 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3917 event pairs, 140 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 1055. Up to 380 conditions per place. [2024-11-10 18:08:10,103 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 42 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-11-10 18:08:10,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 263 flow [2024-11-10 18:08:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-10 18:08:10,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-11-10 18:08:10,109 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 149 flow. Second operand 3 states and 166 transitions. [2024-11-10 18:08:10,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 263 flow [2024-11-10 18:08:10,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 82 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:08:10,114 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 155 flow [2024-11-10 18:08:10,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-11-10 18:08:10,116 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-10 18:08:10,117 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 155 flow [2024-11-10 18:08:10,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:10,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:10,119 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:08:10,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:08:10,119 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:08:10,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2139509200, now seen corresponding path program 1 times [2024-11-10 18:08:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:10,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857716612] [2024-11-10 18:08:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:10,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857716612] [2024-11-10 18:08:10,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857716612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:08:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371285583] [2024-11-10 18:08:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:10,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:08:10,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:08:10,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:08:10,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:08:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:10,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:08:10,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:08:10,542 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 [2024-11-10 18:08:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:10,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:08:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371285583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:08:10,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:08:10,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:08:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568936957] [2024-11-10 18:08:10,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:08:10,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:08:10,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:08:10,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:08:10,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2024-11-10 18:08:10,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 155 flow. Second operand has 9 states, 9 states have (on average 41.333333333333336) internal successors, (372), 9 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:10,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:10,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2024-11-10 18:08:10,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:10,971 INFO L124 PetriNetUnfolderBase]: 36/137 cut-off events. [2024-11-10 18:08:10,971 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-10 18:08:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 137 events. 36/137 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 417 event pairs, 0 based on Foata normal form. 26/156 useless extension candidates. Maximal degree in co-relation 232. Up to 75 conditions per place. [2024-11-10 18:08:10,974 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 29 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-10 18:08:10,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 176 flow [2024-11-10 18:08:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:08:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:08:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2024-11-10 18:08:10,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-10 18:08:10,978 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 155 flow. Second operand 4 states and 189 transitions. [2024-11-10 18:08:10,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 176 flow [2024-11-10 18:08:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:08:10,980 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 84 flow [2024-11-10 18:08:10,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-11-10 18:08:10,983 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -30 predicate places. [2024-11-10 18:08:10,984 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 84 flow [2024-11-10 18:08:10,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 41.333333333333336) internal successors, (372), 9 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:10,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:10,985 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-10 18:08:11,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:08:11,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:08:11,190 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 18:08:11,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1900276074, now seen corresponding path program 1 times [2024-11-10 18:08:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:11,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193195309] [2024-11-10 18:08:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:11,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:11,221 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:08:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:11,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:08:11,265 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:08:11,266 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-11-10 18:08:11,267 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2024-11-10 18:08:11,268 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2024-11-10 18:08:11,268 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2024-11-10 18:08:11,268 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2024-11-10 18:08:11,268 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2024-11-10 18:08:11,269 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2024-11-10 18:08:11,269 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2024-11-10 18:08:11,269 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2024-11-10 18:08:11,269 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2024-11-10 18:08:11,270 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2024-11-10 18:08:11,270 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2024-11-10 18:08:11,270 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2024-11-10 18:08:11,270 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2024-11-10 18:08:11,270 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2024-11-10 18:08:11,271 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2024-11-10 18:08:11,271 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2024-11-10 18:08:11,271 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2024-11-10 18:08:11,271 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2024-11-10 18:08:11,271 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2024-11-10 18:08:11,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2024-11-10 18:08:11,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2024-11-10 18:08:11,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2024-11-10 18:08:11,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2024-11-10 18:08:11,272 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2024-11-10 18:08:11,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:08:11,273 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:08:11,276 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:08:11,276 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 18:08:11,309 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:08:11,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 123 transitions, 262 flow [2024-11-10 18:08:11,360 INFO L124 PetriNetUnfolderBase]: 34/220 cut-off events. [2024-11-10 18:08:11,361 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:08:11,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 220 events. 34/220 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1024 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2024-11-10 18:08:11,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 123 transitions, 262 flow [2024-11-10 18:08:11,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 123 transitions, 262 flow [2024-11-10 18:08:11,367 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:08:11,368 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@71d2a769, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:08:11,368 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-10 18:08:11,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:08:11,375 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:08:11,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:08:11,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:11,375 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:11,379 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:08:11,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash 14582440, now seen corresponding path program 1 times [2024-11-10 18:08:11,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:11,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057661882] [2024-11-10 18:08:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:11,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:11,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057661882] [2024-11-10 18:08:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057661882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:11,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:11,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040449737] [2024-11-10 18:08:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:11,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:11,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 123 [2024-11-10 18:08:11,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:11,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:11,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 123 [2024-11-10 18:08:11,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:12,870 INFO L124 PetriNetUnfolderBase]: 4779/10995 cut-off events. [2024-11-10 18:08:12,870 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-10 18:08:12,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18670 conditions, 10995 events. 4779/10995 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 98378 event pairs, 4092 based on Foata normal form. 3484/13690 useless extension candidates. Maximal degree in co-relation 11902. Up to 6538 conditions per place. [2024-11-10 18:08:12,969 INFO L140 encePairwiseOnDemand]: 101/123 looper letters, 66 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-11-10 18:08:12,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 126 transitions, 404 flow [2024-11-10 18:08:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2024-11-10 18:08:12,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7425474254742548 [2024-11-10 18:08:12,972 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 262 flow. Second operand 3 states and 274 transitions. [2024-11-10 18:08:12,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 126 transitions, 404 flow [2024-11-10 18:08:12,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 126 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:08:12,977 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 224 flow [2024-11-10 18:08:12,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2024-11-10 18:08:12,978 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -1 predicate places. [2024-11-10 18:08:12,978 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 224 flow [2024-11-10 18:08:12,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:12,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:12,979 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:12,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:08:12,979 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:08:12,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash 14582441, now seen corresponding path program 1 times [2024-11-10 18:08:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:12,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198869676] [2024-11-10 18:08:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:12,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198869676] [2024-11-10 18:08:13,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198869676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:13,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:13,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856789903] [2024-11-10 18:08:13,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:13,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:13,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 123 [2024-11-10 18:08:13,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:13,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:13,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 123 [2024-11-10 18:08:13,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:14,479 INFO L124 PetriNetUnfolderBase]: 5090/12627 cut-off events. [2024-11-10 18:08:14,480 INFO L125 PetriNetUnfolderBase]: For 320/320 co-relation queries the response was YES. [2024-11-10 18:08:14,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20971 conditions, 12627 events. 5090/12627 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 121226 event pairs, 2388 based on Foata normal form. 1/11365 useless extension candidates. Maximal degree in co-relation 18417. Up to 8059 conditions per place. [2024-11-10 18:08:14,592 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 57 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-11-10 18:08:14,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 116 transitions, 370 flow [2024-11-10 18:08:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2024-11-10 18:08:14,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6449864498644986 [2024-11-10 18:08:14,595 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 224 flow. Second operand 3 states and 238 transitions. [2024-11-10 18:08:14,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 116 transitions, 370 flow [2024-11-10 18:08:14,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 116 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:08:14,609 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 234 flow [2024-11-10 18:08:14,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-11-10 18:08:14,610 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, 0 predicate places. [2024-11-10 18:08:14,610 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 234 flow [2024-11-10 18:08:14,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:14,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:14,611 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:08:14,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:08:14,612 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:08:14,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -350012816, now seen corresponding path program 1 times [2024-11-10 18:08:14,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:14,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076458973] [2024-11-10 18:08:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:14,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:14,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076458973] [2024-11-10 18:08:14,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076458973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:08:14,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710471595] [2024-11-10 18:08:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:14,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:08:14,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:08:14,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:08:14,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:08:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:14,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:08:14,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:08:14,871 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 [2024-11-10 18:08:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:14,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:08:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:15,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710471595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:08:15,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:08:15,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:08:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805322519] [2024-11-10 18:08:15,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:08:15,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:08:15,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:08:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:08:15,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 123 [2024-11-10 18:08:15,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 234 flow. Second operand has 9 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:15,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:15,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 123 [2024-11-10 18:08:15,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:15,635 INFO L124 PetriNetUnfolderBase]: 1128/2477 cut-off events. [2024-11-10 18:08:15,636 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2024-11-10 18:08:15,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4579 conditions, 2477 events. 1128/2477 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17016 event pairs, 0 based on Foata normal form. 364/2743 useless extension candidates. Maximal degree in co-relation 355. Up to 1443 conditions per place. [2024-11-10 18:08:15,652 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 68 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2024-11-10 18:08:15,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 382 flow [2024-11-10 18:08:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:08:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:08:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 365 transitions. [2024-11-10 18:08:15,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-11-10 18:08:15,655 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 234 flow. Second operand 5 states and 365 transitions. [2024-11-10 18:08:15,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 382 flow [2024-11-10 18:08:15,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:08:15,659 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 164 flow [2024-11-10 18:08:15,660 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-11-10 18:08:15,661 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -27 predicate places. [2024-11-10 18:08:15,661 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 164 flow [2024-11-10 18:08:15,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:15,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:15,662 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:08:15,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:08:15,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-10 18:08:15,863 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:08:15,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash 449462715, now seen corresponding path program 1 times [2024-11-10 18:08:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:15,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789070778] [2024-11-10 18:08:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:15,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:16,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:16,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789070778] [2024-11-10 18:08:16,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789070778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:16,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:16,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:08:16,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731368036] [2024-11-10 18:08:16,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:16,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:08:16,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:08:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:08:16,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 123 [2024-11-10 18:08:16,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:16,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:16,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 123 [2024-11-10 18:08:16,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:16,357 INFO L124 PetriNetUnfolderBase]: 1128/2781 cut-off events. [2024-11-10 18:08:16,357 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2024-11-10 18:08:16,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5053 conditions, 2781 events. 1128/2781 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 19699 event pairs, 36 based on Foata normal form. 0/2753 useless extension candidates. Maximal degree in co-relation 4706. Up to 1764 conditions per place. [2024-11-10 18:08:16,375 INFO L140 encePairwiseOnDemand]: 117/123 looper letters, 46 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-11-10 18:08:16,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 299 flow [2024-11-10 18:08:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:08:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:08:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2024-11-10 18:08:16,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-11-10 18:08:16,377 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 164 flow. Second operand 4 states and 270 transitions. [2024-11-10 18:08:16,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 299 flow [2024-11-10 18:08:16,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 288 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:08:16,380 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 153 flow [2024-11-10 18:08:16,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2024-11-10 18:08:16,381 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -31 predicate places. [2024-11-10 18:08:16,381 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 153 flow [2024-11-10 18:08:16,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:16,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:16,382 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:08:16,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:08:16,382 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:08:16,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash 449462716, now seen corresponding path program 1 times [2024-11-10 18:08:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:16,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940908401] [2024-11-10 18:08:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940908401] [2024-11-10 18:08:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940908401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:16,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:16,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:08:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309728316] [2024-11-10 18:08:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:16,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:08:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:08:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:08:16,584 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 123 [2024-11-10 18:08:16,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:16,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:16,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 123 [2024-11-10 18:08:16,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:16,904 INFO L124 PetriNetUnfolderBase]: 804/1965 cut-off events. [2024-11-10 18:08:16,905 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-11-10 18:08:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3589 conditions, 1965 events. 804/1965 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12634 event pairs, 354 based on Foata normal form. 0/1863 useless extension candidates. Maximal degree in co-relation 3331. Up to 1284 conditions per place. [2024-11-10 18:08:16,918 INFO L140 encePairwiseOnDemand]: 117/123 looper letters, 44 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-11-10 18:08:16,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 79 transitions, 278 flow [2024-11-10 18:08:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:08:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:08:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 276 transitions. [2024-11-10 18:08:16,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-11-10 18:08:16,921 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 153 flow. Second operand 4 states and 276 transitions. [2024-11-10 18:08:16,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 79 transitions, 278 flow [2024-11-10 18:08:16,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:08:16,924 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 146 flow [2024-11-10 18:08:16,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-11-10 18:08:16,926 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -34 predicate places. [2024-11-10 18:08:16,927 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 146 flow [2024-11-10 18:08:16,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:16,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:16,927 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-10 18:08:16,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:08:16,928 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:08:16,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1435530384, now seen corresponding path program 1 times [2024-11-10 18:08:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:16,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674833920] [2024-11-10 18:08:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:16,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:16,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:08:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:08:16,974 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:08:16,974 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:08:16,974 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2024-11-10 18:08:16,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2024-11-10 18:08:16,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2024-11-10 18:08:16,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2024-11-10 18:08:16,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2024-11-10 18:08:16,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2024-11-10 18:08:16,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2024-11-10 18:08:16,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2024-11-10 18:08:16,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2024-11-10 18:08:16,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2024-11-10 18:08:16,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2024-11-10 18:08:16,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2024-11-10 18:08:16,976 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2024-11-10 18:08:16,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2024-11-10 18:08:16,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2024-11-10 18:08:16,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2024-11-10 18:08:16,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2024-11-10 18:08:16,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2024-11-10 18:08:16,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2024-11-10 18:08:16,977 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2024-11-10 18:08:16,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2024-11-10 18:08:16,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2024-11-10 18:08:16,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2024-11-10 18:08:16,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2024-11-10 18:08:16,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2024-11-10 18:08:16,978 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2024-11-10 18:08:16,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2024-11-10 18:08:16,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2024-11-10 18:08:16,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2024-11-10 18:08:16,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2024-11-10 18:08:16,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2024-11-10 18:08:16,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2024-11-10 18:08:16,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2024-11-10 18:08:16,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:08:16,980 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-10 18:08:16,981 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:08:16,981 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 18:08:17,008 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:08:17,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 162 transitions, 351 flow [2024-11-10 18:08:17,049 INFO L124 PetriNetUnfolderBase]: 54/342 cut-off events. [2024-11-10 18:08:17,049 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:08:17,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 342 events. 54/342 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1682 event pairs, 1 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 231. Up to 16 conditions per place. [2024-11-10 18:08:17,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 162 transitions, 351 flow [2024-11-10 18:08:17,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 162 transitions, 351 flow [2024-11-10 18:08:17,061 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:08:17,062 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;@71d2a769, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:08:17,063 INFO L334 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-11-10 18:08:17,064 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:08:17,064 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:08:17,065 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:08:17,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:17,065 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:17,065 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-10 18:08:17,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 19569448, now seen corresponding path program 1 times [2024-11-10 18:08:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:17,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202317550] [2024-11-10 18:08:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:17,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:17,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202317550] [2024-11-10 18:08:17,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202317550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:17,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:17,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:17,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708646826] [2024-11-10 18:08:17,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:17,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:17,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:17,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 162 [2024-11-10 18:08:17,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 162 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:17,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:17,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 162 [2024-11-10 18:08:17,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:34,033 INFO L124 PetriNetUnfolderBase]: 97712/176467 cut-off events. [2024-11-10 18:08:34,033 INFO L125 PetriNetUnfolderBase]: For 1862/1862 co-relation queries the response was YES. [2024-11-10 18:08:34,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313191 conditions, 176467 events. 97712/176467 cut-off events. For 1862/1862 co-relation queries the response was YES. Maximal size of possible extension queue 3702. Compared 1879588 event pairs, 83389 based on Foata normal form. 62268/228663 useless extension candidates. Maximal degree in co-relation 122671. Up to 115814 conditions per place. [2024-11-10 18:08:35,883 INFO L140 encePairwiseOnDemand]: 134/162 looper letters, 92 selfloop transitions, 2 changer transitions 0/171 dead transitions. [2024-11-10 18:08:35,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 171 transitions, 557 flow [2024-11-10 18:08:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-11-10 18:08:35,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7592592592592593 [2024-11-10 18:08:35,886 INFO L175 Difference]: Start difference. First operand has 142 places, 162 transitions, 351 flow. Second operand 3 states and 369 transitions. [2024-11-10 18:08:35,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 171 transitions, 557 flow [2024-11-10 18:08:35,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 171 transitions, 557 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:08:35,895 INFO L231 Difference]: Finished difference. Result has 141 places, 135 transitions, 301 flow [2024-11-10 18:08:35,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=141, PETRI_TRANSITIONS=135} [2024-11-10 18:08:35,896 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, -1 predicate places. [2024-11-10 18:08:35,896 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 135 transitions, 301 flow [2024-11-10 18:08:35,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:35,897 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:35,897 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:35,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:08:35,897 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-10 18:08:35,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash 19569449, now seen corresponding path program 1 times [2024-11-10 18:08:35,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705804276] [2024-11-10 18:08:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705804276] [2024-11-10 18:08:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705804276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:36,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:36,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244671255] [2024-11-10 18:08:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:36,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:36,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:36,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 162 [2024-11-10 18:08:36,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 135 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:36,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:36,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 162 [2024-11-10 18:08:36,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:52,493 INFO L124 PetriNetUnfolderBase]: 103471/190184 cut-off events. [2024-11-10 18:08:52,493 INFO L125 PetriNetUnfolderBase]: For 4674/4674 co-relation queries the response was YES. [2024-11-10 18:08:53,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337419 conditions, 190184 events. 103471/190184 cut-off events. For 4674/4674 co-relation queries the response was YES. Maximal size of possible extension queue 3883. Compared 2059722 event pairs, 97265 based on Foata normal form. 1/175383 useless extension candidates. Maximal degree in co-relation 291894. Up to 143165 conditions per place. [2024-11-10 18:08:54,240 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 71 selfloop transitions, 2 changer transitions 0/149 dead transitions. [2024-11-10 18:08:54,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 149 transitions, 475 flow [2024-11-10 18:08:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2024-11-10 18:08:54,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-11-10 18:08:54,242 INFO L175 Difference]: Start difference. First operand has 141 places, 135 transitions, 301 flow. Second operand 3 states and 309 transitions. [2024-11-10 18:08:54,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 149 transitions, 475 flow [2024-11-10 18:08:54,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 149 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:08:54,645 INFO L231 Difference]: Finished difference. Result has 142 places, 136 transitions, 311 flow [2024-11-10 18:08:54,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=142, PETRI_TRANSITIONS=136} [2024-11-10 18:08:54,646 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, 0 predicate places. [2024-11-10 18:08:54,646 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 136 transitions, 311 flow [2024-11-10 18:08:54,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:54,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:54,647 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:08:54,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:08:54,647 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-10 18:08:54,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash 340971447, now seen corresponding path program 1 times [2024-11-10 18:08:54,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:54,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388696482] [2024-11-10 18:08:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388696482] [2024-11-10 18:08:54,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388696482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:08:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802396819] [2024-11-10 18:08:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:54,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:08:54,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:08:54,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:08:54,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:08:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:54,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:08:54,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:08:54,861 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 [2024-11-10 18:08:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:54,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:08:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802396819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:08:54,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:08:54,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:08:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457426895] [2024-11-10 18:08:54,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:08:54,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:08:54,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:08:54,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:08:55,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 162 [2024-11-10 18:08:55,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 136 transitions, 311 flow. Second operand has 9 states, 9 states have (on average 79.33333333333333) internal successors, (714), 9 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:55,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:55,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 162 [2024-11-10 18:08:55,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:58,722 INFO L124 PetriNetUnfolderBase]: 23436/44389 cut-off events. [2024-11-10 18:08:58,722 INFO L125 PetriNetUnfolderBase]: For 8982/8982 co-relation queries the response was YES. [2024-11-10 18:08:58,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80461 conditions, 44389 events. 23436/44389 cut-off events. For 8982/8982 co-relation queries the response was YES. Maximal size of possible extension queue 1037. Compared 421215 event pairs, 3380 based on Foata normal form. 4758/46852 useless extension candidates. Maximal degree in co-relation 6296. Up to 24843 conditions per place. [2024-11-10 18:08:58,960 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 119 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2024-11-10 18:08:58,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 638 flow [2024-11-10 18:08:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:08:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:08:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 591 transitions. [2024-11-10 18:08:58,962 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6080246913580247 [2024-11-10 18:08:58,962 INFO L175 Difference]: Start difference. First operand has 142 places, 136 transitions, 311 flow. Second operand 6 states and 591 transitions. [2024-11-10 18:08:58,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 638 flow [2024-11-10 18:08:58,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 182 transitions, 634 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 18:08:58,967 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 240 flow [2024-11-10 18:08:58,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2024-11-10 18:08:58,968 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, -26 predicate places. [2024-11-10 18:08:58,968 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 240 flow [2024-11-10 18:08:58,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.33333333333333) internal successors, (714), 9 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:58,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:58,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:08:58,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:08:59,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:08:59,174 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-10 18:08:59,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash 545011970, now seen corresponding path program 1 times [2024-11-10 18:08:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:59,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285390828] [2024-11-10 18:08:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:59,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:59,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285390828] [2024-11-10 18:08:59,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285390828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:59,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:59,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:08:59,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341096175] [2024-11-10 18:08:59,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:59,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:08:59,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:08:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:08:59,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 162 [2024-11-10 18:08:59,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:59,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:59,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 162 [2024-11-10 18:08:59,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:02,629 INFO L124 PetriNetUnfolderBase]: 23436/44324 cut-off events. [2024-11-10 18:09:02,629 INFO L125 PetriNetUnfolderBase]: For 7693/7693 co-relation queries the response was YES. [2024-11-10 18:09:02,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82594 conditions, 44324 events. 23436/44324 cut-off events. For 7693/7693 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 411978 event pairs, 13408 based on Foata normal form. 0/41832 useless extension candidates. Maximal degree in co-relation 82238. Up to 31092 conditions per place. [2024-11-10 18:09:02,909 INFO L140 encePairwiseOnDemand]: 156/162 looper letters, 74 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2024-11-10 18:09:02,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 131 transitions, 468 flow [2024-11-10 18:09:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:09:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:09:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 372 transitions. [2024-11-10 18:09:02,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-10 18:09:02,911 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 240 flow. Second operand 4 states and 372 transitions. [2024-11-10 18:09:02,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 131 transitions, 468 flow [2024-11-10 18:09:02,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 131 transitions, 453 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-10 18:09:02,914 INFO L231 Difference]: Finished difference. Result has 112 places, 100 transitions, 227 flow [2024-11-10 18:09:02,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2024-11-10 18:09:02,915 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, -30 predicate places. [2024-11-10 18:09:02,915 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 227 flow [2024-11-10 18:09:02,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:02,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:02,916 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:02,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:09:02,916 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-10 18:09:02,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash 545011971, now seen corresponding path program 1 times [2024-11-10 18:09:02,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:02,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871064210] [2024-11-10 18:09:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:02,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:03,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:03,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871064210] [2024-11-10 18:09:03,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871064210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:03,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:03,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:09:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244025123] [2024-11-10 18:09:03,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:03,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:09:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:09:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:09:03,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 162 [2024-11-10 18:09:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:03,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 162 [2024-11-10 18:09:03,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand