./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.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/09-regions_13-arraycollapse_nr.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 b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:06:11,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:06:11,153 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:06:11,158 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:06:11,158 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:06:11,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:06:11,192 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:06:11,193 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:06:11,193 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:06:11,194 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:06:11,194 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:06:11,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:06:11,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:06:11,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:06:11,196 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:06:11,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:06:11,197 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:06:11,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:06:11,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:06:11,198 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:06:11,198 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:06:11,199 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:06:11,199 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:06:11,200 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:06:11,200 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:06:11,200 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:06:11,201 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:06:11,201 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:06:11,201 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:06:11,202 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:06:11,202 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:06:11,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:06:11,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:06:11,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:06:11,203 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:06:11,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:06:11,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:06:11,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:06:11,205 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:06:11,205 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:06:11,205 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:06:11,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:06:11,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b [2024-11-10 18:06:11,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:06:11,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:06:11,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:06:11,517 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:06:11,518 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:06:11,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-11-10 18:06:13,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:06:13,628 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:06:13,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-11-10 18:06:13,648 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb1eb4de4/55ad91cdfdcb487eb225a7de83cf8133/FLAG7006ee3bf [2024-11-10 18:06:13,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb1eb4de4/55ad91cdfdcb487eb225a7de83cf8133 [2024-11-10 18:06:13,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:06:13,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:06:13,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:06:13,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:06:13,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:06:13,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:06:13" (1/1) ... [2024-11-10 18:06:13,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295c6f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:13, skipping insertion in model container [2024-11-10 18:06:13,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:06:13" (1/1) ... [2024-11-10 18:06:13,732 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:06:14,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:06:14,367 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:06:14,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:06:14,490 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:06:14,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14 WrapperNode [2024-11-10 18:06:14,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:06:14,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:06:14,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:06:14,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:06:14,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,589 INFO L138 Inliner]: procedures = 372, calls = 95, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 228 [2024-11-10 18:06:14,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:06:14,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:06:14,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:06:14,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:06:14,609 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,620 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,663 INFO L175 MemorySlicer]: Split 90 memory accesses to 3 slices as follows [50, 16, 24]. 56 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 19 writes are split as follows [0, 1, 18]. [2024-11-10 18:06:14,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,689 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,690 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,708 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:06:14,712 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:06:14,712 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:06:14,713 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:06:14,714 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (1/1) ... [2024-11-10 18:06:14,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:06:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:14,762 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 18:06:14,765 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 18:06:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-10 18:06:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-10 18:06:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-10 18:06:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-10 18:06:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-10 18:06:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-10 18:06:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:06:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:06:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:06:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-10 18:06:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-10 18:06:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-10 18:06:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:06:14,815 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:06:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:06:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:06:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:06:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:06:14,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:06:14,818 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 18:06:14,978 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:06:14,980 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:06:15,613 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:06:15,614 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:06:16,132 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:06:16,133 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:06:16,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:06:16 BoogieIcfgContainer [2024-11-10 18:06:16,134 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:06:16,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:06:16,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:06:16,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:06:16,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:06:13" (1/3) ... [2024-11-10 18:06:16,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b255dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:06:16, skipping insertion in model container [2024-11-10 18:06:16,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:14" (2/3) ... [2024-11-10 18:06:16,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b255dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:06:16, skipping insertion in model container [2024-11-10 18:06:16,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:06:16" (3/3) ... [2024-11-10 18:06:16,144 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr.i [2024-11-10 18:06:16,163 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:06:16,163 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2024-11-10 18:06:16,164 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:06:16,283 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 18:06:16,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 110 transitions, 224 flow [2024-11-10 18:06:16,372 INFO L124 PetriNetUnfolderBase]: 2/109 cut-off events. [2024-11-10 18:06:16,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:16,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 109 events. 2/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 352 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-11-10 18:06:16,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 110 transitions, 224 flow [2024-11-10 18:06:16,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 109 transitions, 221 flow [2024-11-10 18:06:16,395 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:06:16,404 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;@5055dd58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:06:16,405 INFO L334 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2024-11-10 18:06:16,411 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:06:16,412 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:06:16,413 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:16,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:16,415 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:06:16,415 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:16,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash 21468295, now seen corresponding path program 1 times [2024-11-10 18:06:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:16,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598526835] [2024-11-10 18:06:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:16,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:16,849 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 18:06:16,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:16,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598526835] [2024-11-10 18:06:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598526835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:16,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:16,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:16,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574170433] [2024-11-10 18:06:16,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:16,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:17,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 110 [2024-11-10 18:06:17,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 18:06:17,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:17,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 110 [2024-11-10 18:06:17,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:17,208 INFO L124 PetriNetUnfolderBase]: 64/295 cut-off events. [2024-11-10 18:06:17,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:17,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 295 events. 64/295 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1318 event pairs, 63 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2024-11-10 18:06:17,215 INFO L140 encePairwiseOnDemand]: 93/110 looper letters, 30 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-11-10 18:06:17,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 279 flow [2024-11-10 18:06:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2024-11-10 18:06:17,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7151515151515152 [2024-11-10 18:06:17,231 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 221 flow. Second operand 3 states and 236 transitions. [2024-11-10 18:06:17,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 279 flow [2024-11-10 18:06:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:17,237 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 218 flow [2024-11-10 18:06:17,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2024-11-10 18:06:17,243 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2024-11-10 18:06:17,244 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 218 flow [2024-11-10 18:06:17,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 18:06:17,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:17,245 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:06:17,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:06:17,245 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:17,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash 21468296, now seen corresponding path program 1 times [2024-11-10 18:06:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806012888] [2024-11-10 18:06:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:17,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:17,351 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 18:06:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806012888] [2024-11-10 18:06:17,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806012888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:17,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:17,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:17,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528452123] [2024-11-10 18:06:17,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:17,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:17,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 110 [2024-11-10 18:06:17,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 18:06:17,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 110 [2024-11-10 18:06:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:17,639 INFO L124 PetriNetUnfolderBase]: 64/287 cut-off events. [2024-11-10 18:06:17,639 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-10 18:06:17,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 287 events. 64/287 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1273 event pairs, 63 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 395. Up to 157 conditions per place. [2024-11-10 18:06:17,642 INFO L140 encePairwiseOnDemand]: 94/110 looper letters, 26 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2024-11-10 18:06:17,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 270 flow [2024-11-10 18:06:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2024-11-10 18:06:17,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7363636363636363 [2024-11-10 18:06:17,645 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 218 flow. Second operand 3 states and 243 transitions. [2024-11-10 18:06:17,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 270 flow [2024-11-10 18:06:17,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:17,648 INFO L231 Difference]: Finished difference. Result has 96 places, 92 transitions, 202 flow [2024-11-10 18:06:17,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2024-11-10 18:06:17,649 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -15 predicate places. [2024-11-10 18:06:17,649 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 202 flow [2024-11-10 18:06:17,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 18:06:17,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:17,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:06:17,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:06:17,650 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:17,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -843783883, now seen corresponding path program 1 times [2024-11-10 18:06:17,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:17,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410468286] [2024-11-10 18:06:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:17,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:17,809 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 18:06:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410468286] [2024-11-10 18:06:17,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410468286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:17,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425373772] [2024-11-10 18:06:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:17,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:06:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:06:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:06:18,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 110 [2024-11-10 18:06:18,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 64.83333333333333) internal successors, (389), 6 states have internal predecessors, (389), 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 18:06:18,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:18,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 110 [2024-11-10 18:06:18,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:18,135 INFO L124 PetriNetUnfolderBase]: 73/307 cut-off events. [2024-11-10 18:06:18,135 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:06:18,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 307 events. 73/307 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1386 event pairs, 72 based on Foata normal form. 1/248 useless extension candidates. Maximal degree in co-relation 437. Up to 183 conditions per place. [2024-11-10 18:06:18,138 INFO L140 encePairwiseOnDemand]: 103/110 looper letters, 38 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2024-11-10 18:06:18,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 268 flow [2024-11-10 18:06:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2024-11-10 18:06:18,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7181818181818181 [2024-11-10 18:06:18,141 INFO L175 Difference]: Start difference. First operand has 96 places, 92 transitions, 202 flow. Second operand 3 states and 237 transitions. [2024-11-10 18:06:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 268 flow [2024-11-10 18:06:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 86 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:18,143 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 176 flow [2024-11-10 18:06:18,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-11-10 18:06:18,144 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -21 predicate places. [2024-11-10 18:06:18,145 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 176 flow [2024-11-10 18:06:18,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.83333333333333) internal successors, (389), 6 states have internal predecessors, (389), 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 18:06:18,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:18,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:06:18,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 18:06:18,146 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:18,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash -843783882, now seen corresponding path program 1 times [2024-11-10 18:06:18,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:18,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153553139] [2024-11-10 18:06:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:18,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:18,344 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 18:06:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153553139] [2024-11-10 18:06:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153553139] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:06:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138146289] [2024-11-10 18:06:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:18,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:06:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:06:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:06:18,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 110 [2024-11-10 18:06:18,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 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 18:06:18,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:18,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 110 [2024-11-10 18:06:18,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:18,769 INFO L124 PetriNetUnfolderBase]: 64/294 cut-off events. [2024-11-10 18:06:18,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:18,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 294 events. 64/294 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1224 event pairs, 63 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 464. Up to 164 conditions per place. [2024-11-10 18:06:18,775 INFO L140 encePairwiseOnDemand]: 101/110 looper letters, 38 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2024-11-10 18:06:18,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 278 flow [2024-11-10 18:06:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:06:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:06:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 279 transitions. [2024-11-10 18:06:18,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.634090909090909 [2024-11-10 18:06:18,779 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 176 flow. Second operand 4 states and 279 transitions. [2024-11-10 18:06:18,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 278 flow [2024-11-10 18:06:18,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 93 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:18,786 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 223 flow [2024-11-10 18:06:18,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-11-10 18:06:18,787 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -17 predicate places. [2024-11-10 18:06:18,788 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 223 flow [2024-11-10 18:06:18,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 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 18:06:18,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:18,788 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:18,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:06:18,790 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:18,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash 981465627, now seen corresponding path program 1 times [2024-11-10 18:06:18,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368402126] [2024-11-10 18:06:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:19,125 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 18:06:19,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368402126] [2024-11-10 18:06:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368402126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:19,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:19,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:06:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421830385] [2024-11-10 18:06:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:19,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:06:19,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:06:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:06:19,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 110 [2024-11-10 18:06:19,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 223 flow. Second operand has 7 states, 7 states have (on average 55.285714285714285) internal successors, (387), 7 states have internal predecessors, (387), 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 18:06:19,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:19,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 110 [2024-11-10 18:06:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:19,858 INFO L124 PetriNetUnfolderBase]: 64/288 cut-off events. [2024-11-10 18:06:19,858 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:06:19,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 288 events. 64/288 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1175 event pairs, 63 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 485. Up to 154 conditions per place. [2024-11-10 18:06:19,861 INFO L140 encePairwiseOnDemand]: 93/110 looper letters, 30 selfloop transitions, 18 changer transitions 0/87 dead transitions. [2024-11-10 18:06:19,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 87 transitions, 311 flow [2024-11-10 18:06:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:06:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:06:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 479 transitions. [2024-11-10 18:06:19,864 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5443181818181818 [2024-11-10 18:06:19,864 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 223 flow. Second operand 8 states and 479 transitions. [2024-11-10 18:06:19,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 87 transitions, 311 flow [2024-11-10 18:06:19,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 87 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:19,867 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 249 flow [2024-11-10 18:06:19,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=249, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2024-11-10 18:06:19,868 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -15 predicate places. [2024-11-10 18:06:19,869 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 249 flow [2024-11-10 18:06:19,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.285714285714285) internal successors, (387), 7 states have internal predecessors, (387), 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 18:06:19,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:19,870 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:19,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:06:19,870 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:19,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash 981465628, now seen corresponding path program 1 times [2024-11-10 18:06:19,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:19,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188290556] [2024-11-10 18:06:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:19,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:20,260 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 18:06:20,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188290556] [2024-11-10 18:06:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188290556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:20,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:20,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:06:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208049374] [2024-11-10 18:06:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:20,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:06:20,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:06:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:06:20,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 110 [2024-11-10 18:06:20,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 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 18:06:20,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:20,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 110 [2024-11-10 18:06:20,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:21,160 INFO L124 PetriNetUnfolderBase]: 64/284 cut-off events. [2024-11-10 18:06:21,160 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-10 18:06:21,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 284 events. 64/284 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1172 event pairs, 63 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 497. Up to 158 conditions per place. [2024-11-10 18:06:21,163 INFO L140 encePairwiseOnDemand]: 98/110 looper letters, 32 selfloop transitions, 15 changer transitions 0/85 dead transitions. [2024-11-10 18:06:21,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 85 transitions, 339 flow [2024-11-10 18:06:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:06:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:06:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 387 transitions. [2024-11-10 18:06:21,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5025974025974026 [2024-11-10 18:06:21,165 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 249 flow. Second operand 7 states and 387 transitions. [2024-11-10 18:06:21,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 85 transitions, 339 flow [2024-11-10 18:06:21,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 85 transitions, 303 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-10 18:06:21,168 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 239 flow [2024-11-10 18:06:21,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2024-11-10 18:06:21,169 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -18 predicate places. [2024-11-10 18:06:21,169 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 239 flow [2024-11-10 18:06:21,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 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 18:06:21,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:21,169 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:21,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:06:21,170 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:21,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1704315210, now seen corresponding path program 1 times [2024-11-10 18:06:21,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:21,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151353736] [2024-11-10 18:06:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:21,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:21,270 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 18:06:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151353736] [2024-11-10 18:06:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151353736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:21,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:21,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718415993] [2024-11-10 18:06:21,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:21,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:06:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:06:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:06:21,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 110 [2024-11-10 18:06:21,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 239 flow. Second operand has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 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 18:06:21,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:21,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 110 [2024-11-10 18:06:21,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:21,664 INFO L124 PetriNetUnfolderBase]: 64/282 cut-off events. [2024-11-10 18:06:21,664 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-10 18:06:21,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 282 events. 64/282 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1169 event pairs, 63 based on Foata normal form. 2/235 useless extension candidates. Maximal degree in co-relation 490. Up to 158 conditions per place. [2024-11-10 18:06:21,670 INFO L140 encePairwiseOnDemand]: 99/110 looper letters, 30 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2024-11-10 18:06:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 84 transitions, 327 flow [2024-11-10 18:06:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:06:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:06:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2024-11-10 18:06:21,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-10 18:06:21,681 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 239 flow. Second operand 5 states and 341 transitions. [2024-11-10 18:06:21,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 84 transitions, 327 flow [2024-11-10 18:06:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 84 transitions, 297 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:06:21,683 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 237 flow [2024-11-10 18:06:21,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2024-11-10 18:06:21,684 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -21 predicate places. [2024-11-10 18:06:21,684 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 237 flow [2024-11-10 18:06:21,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 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 18:06:21,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:21,685 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:21,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:06:21,685 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:21,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:21,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1704315209, now seen corresponding path program 1 times [2024-11-10 18:06:21,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:21,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500748683] [2024-11-10 18:06:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:22,104 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 18:06:22,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:22,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500748683] [2024-11-10 18:06:22,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500748683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:22,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728048052] [2024-11-10 18:06:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:22,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:06:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:06:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:06:22,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 110 [2024-11-10 18:06:22,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 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 18:06:22,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:22,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 110 [2024-11-10 18:06:22,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:22,543 INFO L124 PetriNetUnfolderBase]: 64/280 cut-off events. [2024-11-10 18:06:22,544 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-10 18:06:22,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 280 events. 64/280 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1157 event pairs, 63 based on Foata normal form. 2/233 useless extension candidates. Maximal degree in co-relation 482. Up to 158 conditions per place. [2024-11-10 18:06:22,549 INFO L140 encePairwiseOnDemand]: 99/110 looper letters, 26 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-11-10 18:06:22,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 83 transitions, 317 flow [2024-11-10 18:06:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:06:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:06:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 397 transitions. [2024-11-10 18:06:22,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7218181818181818 [2024-11-10 18:06:22,551 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 237 flow. Second operand 5 states and 397 transitions. [2024-11-10 18:06:22,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 83 transitions, 317 flow [2024-11-10 18:06:22,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:06:22,554 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 235 flow [2024-11-10 18:06:22,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-11-10 18:06:22,555 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -22 predicate places. [2024-11-10 18:06:22,555 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 235 flow [2024-11-10 18:06:22,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 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 18:06:22,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:22,556 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:22,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:06:22,557 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:22,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:22,557 INFO L85 PathProgramCache]: Analyzing trace with hash -625489222, now seen corresponding path program 1 times [2024-11-10 18:06:22,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:22,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812545918] [2024-11-10 18:06:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:22,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:22,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:22,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812545918] [2024-11-10 18:06:22,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812545918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734809170] [2024-11-10 18:06:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:22,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:22,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:22,993 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 18:06:22,995 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 18:06:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:23,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 18:06:23,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:23,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:23,321 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:06:23,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-10 18:06:23,351 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:23,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:23,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:23,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:23,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:23,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:23,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:23,834 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:23,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:23,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734809170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:23,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:23,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 17 [2024-11-10 18:06:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486510301] [2024-11-10 18:06:23,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:23,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 18:06:23,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:23,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 18:06:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-11-10 18:06:26,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 110 [2024-11-10 18:06:26,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 235 flow. Second operand has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 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 18:06:26,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:26,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 110 [2024-11-10 18:06:26,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:26,803 INFO L124 PetriNetUnfolderBase]: 75/340 cut-off events. [2024-11-10 18:06:26,807 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-10 18:06:26,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 340 events. 75/340 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1471 event pairs, 72 based on Foata normal form. 7/293 useless extension candidates. Maximal degree in co-relation 613. Up to 179 conditions per place. [2024-11-10 18:06:26,810 INFO L140 encePairwiseOnDemand]: 100/110 looper letters, 53 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-11-10 18:06:26,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 105 transitions, 473 flow [2024-11-10 18:06:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:06:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:06:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 528 transitions. [2024-11-10 18:06:26,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-10 18:06:26,812 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 235 flow. Second operand 8 states and 528 transitions. [2024-11-10 18:06:26,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 105 transitions, 473 flow [2024-11-10 18:06:26,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 105 transitions, 407 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:06:26,817 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 267 flow [2024-11-10 18:06:26,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=267, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2024-11-10 18:06:26,818 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -16 predicate places. [2024-11-10 18:06:26,818 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 267 flow [2024-11-10 18:06:26,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 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 18:06:26,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:26,821 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:26,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 18:06:27,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:27,028 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:27,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1384719861, now seen corresponding path program 1 times [2024-11-10 18:06:27,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:27,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072651317] [2024-11-10 18:06:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:27,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:27,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:27,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072651317] [2024-11-10 18:06:27,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072651317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:27,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795006332] [2024-11-10 18:06:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:27,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:27,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:27,204 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 18:06:27,211 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 18:06:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:27,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 18:06:27,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:27,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:27,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795006332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:27,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:27,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-10 18:06:27,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83847765] [2024-11-10 18:06:27,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:27,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:06:27,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:06:27,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:06:27,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 110 [2024-11-10 18:06:27,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 267 flow. Second operand has 9 states, 9 states have (on average 78.66666666666667) internal successors, (708), 9 states have internal predecessors, (708), 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 18:06:27,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:27,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 110 [2024-11-10 18:06:27,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:27,767 INFO L124 PetriNetUnfolderBase]: 64/326 cut-off events. [2024-11-10 18:06:27,767 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-10 18:06:27,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 326 events. 64/326 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1117 event pairs, 63 based on Foata normal form. 4/280 useless extension candidates. Maximal degree in co-relation 591. Up to 155 conditions per place. [2024-11-10 18:06:27,769 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 63 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-11-10 18:06:27,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 113 transitions, 505 flow [2024-11-10 18:06:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:06:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:06:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 667 transitions. [2024-11-10 18:06:27,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7579545454545454 [2024-11-10 18:06:27,773 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 267 flow. Second operand 8 states and 667 transitions. [2024-11-10 18:06:27,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 113 transitions, 505 flow [2024-11-10 18:06:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 113 transitions, 493 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:27,778 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 301 flow [2024-11-10 18:06:27,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2024-11-10 18:06:27,779 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, -6 predicate places. [2024-11-10 18:06:27,779 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 301 flow [2024-11-10 18:06:27,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.66666666666667) internal successors, (708), 9 states have internal predecessors, (708), 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 18:06:27,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:27,780 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-10 18:06:27,803 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 18:06:27,983 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,SelfDestructingSolverStorable9 [2024-11-10 18:06:27,984 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:27,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:27,985 INFO L85 PathProgramCache]: Analyzing trace with hash 239275062, now seen corresponding path program 2 times [2024-11-10 18:06:27,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:27,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977872285] [2024-11-10 18:06:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:27,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:30,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:30,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977872285] [2024-11-10 18:06:30,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977872285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:30,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656551406] [2024-11-10 18:06:30,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:06:30,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:30,130 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 18:06:30,132 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 18:06:30,425 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:06:30,425 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:06:30,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-10 18:06:30,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:30,494 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:30,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:30,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:30,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:06:30,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:30,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:30,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:30,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:30,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:30,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:30,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:30,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:30,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:31,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:31,143 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:06:31,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-10 18:06:31,159 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:06:31,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:06:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:31,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-10 18:06:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:31,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:31,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:31,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:31,747 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:31,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:32,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:32,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:32,099 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:32,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:32,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:32,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:32,424 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:32,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:32,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:32,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-10 18:06:32,828 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:06:32,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-10 18:06:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:32,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656551406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:32,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:32,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 36 [2024-11-10 18:06:32,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509385249] [2024-11-10 18:06:32,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:32,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-10 18:06:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-10 18:06:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2024-11-10 18:06:46,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 110 [2024-11-10 18:06:46,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 301 flow. Second operand has 38 states, 38 states have (on average 59.526315789473685) internal successors, (2262), 38 states have internal predecessors, (2262), 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 18:06:46,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:46,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 110 [2024-11-10 18:06:46,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:47,678 INFO L124 PetriNetUnfolderBase]: 77/410 cut-off events. [2024-11-10 18:06:47,678 INFO L125 PetriNetUnfolderBase]: For 385/385 co-relation queries the response was YES. [2024-11-10 18:06:47,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 410 events. 77/410 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1539 event pairs, 72 based on Foata normal form. 6/362 useless extension candidates. Maximal degree in co-relation 825. Up to 181 conditions per place. [2024-11-10 18:06:47,681 INFO L140 encePairwiseOnDemand]: 102/110 looper letters, 83 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-11-10 18:06:47,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 855 flow [2024-11-10 18:06:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 18:06:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 18:06:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1086 transitions. [2024-11-10 18:06:47,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5807486631016042 [2024-11-10 18:06:47,685 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 301 flow. Second operand 17 states and 1086 transitions. [2024-11-10 18:06:47,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 855 flow [2024-11-10 18:06:47,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 151 transitions, 849 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:06:47,691 INFO L231 Difference]: Finished difference. Result has 129 places, 105 transitions, 527 flow [2024-11-10 18:06:47,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=527, PETRI_PLACES=129, PETRI_TRANSITIONS=105} [2024-11-10 18:06:47,692 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, 18 predicate places. [2024-11-10 18:06:47,693 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 105 transitions, 527 flow [2024-11-10 18:06:47,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 59.526315789473685) internal successors, (2262), 38 states have internal predecessors, (2262), 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 18:06:47,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:47,694 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:47,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:06:47,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:47,899 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:47,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1791321355, now seen corresponding path program 2 times [2024-11-10 18:06:47,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:47,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780127927] [2024-11-10 18:06:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:48,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:48,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780127927] [2024-11-10 18:06:48,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780127927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:48,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719862587] [2024-11-10 18:06:48,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:06:48,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:48,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:48,462 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:48,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:06:48,823 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:06:48,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:06:48,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:06:48,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:48,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:49,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719862587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:49,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:49,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-10 18:06:49,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873885152] [2024-11-10 18:06:49,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:49,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:06:49,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:06:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:06:49,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 110 [2024-11-10 18:06:49,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 105 transitions, 527 flow. Second operand has 13 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 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 18:06:49,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:49,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 110 [2024-11-10 18:06:49,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:49,367 INFO L124 PetriNetUnfolderBase]: 64/372 cut-off events. [2024-11-10 18:06:49,368 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2024-11-10 18:06:49,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 372 events. 64/372 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1122 event pairs, 63 based on Foata normal form. 4/326 useless extension candidates. Maximal degree in co-relation 822. Up to 155 conditions per place. [2024-11-10 18:06:49,370 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 88 selfloop transitions, 12 changer transitions 0/142 dead transitions. [2024-11-10 18:06:49,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 142 transitions, 937 flow [2024-11-10 18:06:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:06:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:06:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 991 transitions. [2024-11-10 18:06:49,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7507575757575757 [2024-11-10 18:06:49,373 INFO L175 Difference]: Start difference. First operand has 129 places, 105 transitions, 527 flow. Second operand 12 states and 991 transitions. [2024-11-10 18:06:49,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 142 transitions, 937 flow [2024-11-10 18:06:49,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 142 transitions, 878 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-10 18:06:49,379 INFO L231 Difference]: Finished difference. Result has 139 places, 102 transitions, 503 flow [2024-11-10 18:06:49,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=503, PETRI_PLACES=139, PETRI_TRANSITIONS=102} [2024-11-10 18:06:49,379 INFO L277 CegarLoopForPetriNet]: 111 programPoint places, 28 predicate places. [2024-11-10 18:06:49,380 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 102 transitions, 503 flow [2024-11-10 18:06:49,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 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 18:06:49,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:49,381 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-10 18:06:49,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 18:06:49,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:49,582 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-10 18:06:49,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1690968906, now seen corresponding path program 3 times [2024-11-10 18:06:49,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:49,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156516885] [2024-11-10 18:06:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:49,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 444 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:50,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:50,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156516885] [2024-11-10 18:06:50,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156516885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:50,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699871633] [2024-11-10 18:06:50,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:06:50,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:50,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:50,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:50,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process