./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:53:39,810 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:53:39,869 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:53:39,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:53:39,873 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:53:39,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:53:39,895 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:53:39,896 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:53:39,896 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:53:39,896 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:53:39,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:53:39,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:53:39,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:53:39,900 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:53:39,901 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:53:39,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:53:39,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:53:39,901 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:53:39,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:53:39,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:53:39,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:53:39,905 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:53:39,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:53:39,905 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:53:39,905 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:53:39,905 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:53:39,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:53:39,905 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:53:39,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:53:39,906 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:53:39,906 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:53:39,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:53:39,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:53:39,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:53:39,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:53:39,907 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:53:39,907 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:53:39,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:53:39,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:53:39,907 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:53:39,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:53:39,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:53:39,909 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2024-11-22 13:53:40,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:53:40,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:53:40,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:53:40,116 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:53:40,117 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:53:40,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-11-22 13:53:41,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:53:41,457 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:53:41,458 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-11-22 13:53:41,466 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6d0b44cb/01e79842ee3b4209a594473e7b2ccb84/FLAGe0b3290e6 [2024-11-22 13:53:41,874 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6d0b44cb/01e79842ee3b4209a594473e7b2ccb84 [2024-11-22 13:53:41,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:53:41,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:53:41,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:53:41,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:53:41,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:53:41,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:53:41" (1/1) ... [2024-11-22 13:53:41,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ef3ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:41, skipping insertion in model container [2024-11-22 13:53:41,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:53:41" (1/1) ... [2024-11-22 13:53:41,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:53:42,051 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-11-22 13:53:42,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:53:42,064 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:53:42,079 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-11-22 13:53:42,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:53:42,110 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:53:42,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42 WrapperNode [2024-11-22 13:53:42,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:53:42,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:53:42,116 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:53:42,116 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:53:42,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,162 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2024-11-22 13:53:42,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:53:42,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:53:42,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:53:42,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:53:42,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,173 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,187 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 13:53:42,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:53:42,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:53:42,197 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:53:42,197 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:53:42,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (1/1) ... [2024-11-22 13:53:42,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:53:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:42,227 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) [2024-11-22 13:53:42,230 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 [2024-11-22 13:53:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:53:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:53:42,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:53:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:53:42,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:53:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:53:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:53:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:53:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:53:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 13:53:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 13:53:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 13:53:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:53:42,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:53:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:53:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:53:42,273 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:53:42,364 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:53:42,367 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:53:42,566 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:53:42,566 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:53:42,725 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:53:42,725 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 13:53:42,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:53:42 BoogieIcfgContainer [2024-11-22 13:53:42,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:53:42,728 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:53:42,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:53:42,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:53:42,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:53:41" (1/3) ... [2024-11-22 13:53:42,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41490492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:53:42, skipping insertion in model container [2024-11-22 13:53:42,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:53:42" (2/3) ... [2024-11-22 13:53:42,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41490492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:53:42, skipping insertion in model container [2024-11-22 13:53:42,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:53:42" (3/3) ... [2024-11-22 13:53:42,735 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-11-22 13:53:42,749 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:53:42,750 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:53:42,750 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:53:42,784 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:53:42,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-11-22 13:53:42,839 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-11-22 13:53:42,839 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:53:42,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-11-22 13:53:42,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-11-22 13:53:42,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-11-22 13:53:42,855 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:53:42,861 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@65b3710e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:53:42,861 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:53:42,870 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:53:42,870 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-11-22 13:53:42,870 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:53:42,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:42,871 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:42,871 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:42,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:42,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1302421153, now seen corresponding path program 1 times [2024-11-22 13:53:42,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:42,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147250894] [2024-11-22 13:53:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:53:42,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:43,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:43,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147250894] [2024-11-22 13:53:43,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147250894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:53:43,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:53:43,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:53:43,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656920894] [2024-11-22 13:53:43,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:53:43,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 13:53:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 13:53:43,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 13:53:43,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:43,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2024-11-22 13:53:43,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:43,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:43,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:43,138 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-11-22 13:53:43,138 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-22 13:53:43,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 94 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-11-22 13:53:43,143 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-22 13:53:43,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-11-22 13:53:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 13:53:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-22 13:53:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-11-22 13:53:43,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-22 13:53:43,155 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-11-22 13:53:43,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-11-22 13:53:43,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 13:53:43,158 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-22 13:53:43,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-22 13:53:43,162 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-22 13:53:43,163 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-22 13:53:43,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2024-11-22 13:53:43,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:43,163 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:43,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:53:43,163 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:43,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash -406957548, now seen corresponding path program 1 times [2024-11-22 13:53:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:43,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942789191] [2024-11-22 13:53:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:53:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:43,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:43,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942789191] [2024-11-22 13:53:43,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942789191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:53:43,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:53:43,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:53:43,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144577985] [2024-11-22 13:53:43,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:53:43,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:53:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:53:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:53:43,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:43,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-22 13:53:43,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:43,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:43,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:43,400 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-11-22 13:53:43,400 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 13:53:43,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1259 event pairs, 82 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-11-22 13:53:43,404 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-11-22 13:53:43,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-11-22 13:53:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:53:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:53:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-22 13:53:43,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-22 13:53:43,405 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-11-22 13:53:43,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-11-22 13:53:43,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 13:53:43,407 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-11-22 13:53:43,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-11-22 13:53:43,407 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-22 13:53:43,408 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-11-22 13:53:43,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-22 13:53:43,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:43,408 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:43,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:53:43,410 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:43,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:43,411 INFO L85 PathProgramCache]: Analyzing trace with hash -132930614, now seen corresponding path program 1 times [2024-11-22 13:53:43,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:43,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141815849] [2024-11-22 13:53:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:53:43,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:43,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141815849] [2024-11-22 13:53:43,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141815849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:53:43,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:53:43,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:53:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901741042] [2024-11-22 13:53:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:53:43,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:53:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:53:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:53:43,523 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:43,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-22 13:53:43,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:43,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:43,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:43,600 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-11-22 13:53:43,601 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-22 13:53:43,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1673 event pairs, 113 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-11-22 13:53:43,604 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-11-22 13:53:43,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-11-22 13:53:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:53:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:53:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-22 13:53:43,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-22 13:53:43,607 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-11-22 13:53:43,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-11-22 13:53:43,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:53:43,610 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-11-22 13:53:43,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-11-22 13:53:43,610 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-11-22 13:53:43,610 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-11-22 13:53:43,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-22 13:53:43,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:43,611 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:43,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:53:43,611 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:43,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1274929099, now seen corresponding path program 1 times [2024-11-22 13:53:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:43,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65334877] [2024-11-22 13:53:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:53:43,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:43,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:43,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65334877] [2024-11-22 13:53:43,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65334877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:53:43,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:53:43,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:53:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819942370] [2024-11-22 13:53:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:53:43,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:53:43,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:53:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:53:43,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:43,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-11-22 13:53:43,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:43,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:43,847 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-11-22 13:53:43,847 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-22 13:53:43,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2454 event pairs, 285 based on Foata normal form. 12/501 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-11-22 13:53:43,849 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-11-22 13:53:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-11-22 13:53:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:53:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:53:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-11-22 13:53:43,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-11-22 13:53:43,852 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-11-22 13:53:43,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-11-22 13:53:43,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:53:43,853 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-11-22 13:53:43,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-11-22 13:53:43,854 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-22 13:53:43,854 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-11-22 13:53:43,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-11-22 13:53:43,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:43,855 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:43,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:53:43,856 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:43,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2016933381, now seen corresponding path program 1 times [2024-11-22 13:53:43,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:43,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926464553] [2024-11-22 13:53:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:53:43,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:44,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:44,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926464553] [2024-11-22 13:53:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926464553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:44,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053302583] [2024-11-22 13:53:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:53:44,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:44,236 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) [2024-11-22 13:53:44,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:53:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:44,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 13:53:44,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:44,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-22 13:53:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:44,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:44,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-22 13:53:44,894 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:53:44,895 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 46 treesize of output 37 [2024-11-22 13:53:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053302583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:44,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:44,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-22 13:53:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140745211] [2024-11-22 13:53:44,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:44,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:53:44,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:53:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:53:44,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:44,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2024-11-22 13:53:44,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:44,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:44,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:45,592 INFO L124 PetriNetUnfolderBase]: 1151/2030 cut-off events. [2024-11-22 13:53:45,592 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2024-11-22 13:53:45,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 2030 events. 1151/2030 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10473 event pairs, 423 based on Foata normal form. 5/1719 useless extension candidates. Maximal degree in co-relation 4445. Up to 452 conditions per place. [2024-11-22 13:53:45,600 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 109 selfloop transitions, 21 changer transitions 30/163 dead transitions. [2024-11-22 13:53:45,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 163 transitions, 764 flow [2024-11-22 13:53:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 13:53:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 13:53:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 231 transitions. [2024-11-22 13:53:45,602 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-11-22 13:53:45,602 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 14 states and 231 transitions. [2024-11-22 13:53:45,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 163 transitions, 764 flow [2024-11-22 13:53:45,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 163 transitions, 752 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-22 13:53:45,606 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 258 flow [2024-11-22 13:53:45,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=258, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-22 13:53:45,607 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2024-11-22 13:53:45,607 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 258 flow [2024-11-22 13:53:45,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2024-11-22 13:53:45,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:45,607 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:45,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 13:53:45,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:45,812 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:45,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1030127305, now seen corresponding path program 2 times [2024-11-22 13:53:45,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:45,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781957584] [2024-11-22 13:53:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:53:45,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:45,848 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:53:45,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:46,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781957584] [2024-11-22 13:53:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781957584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725053823] [2024-11-22 13:53:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:53:46,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:46,562 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) [2024-11-22 13:53:46,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:53:46,617 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:53:46,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:46,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 13:53:46,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:53:46,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:46,746 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:53:46,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 13:53:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:53:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725053823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:46,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:46,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 14 [2024-11-22 13:53:46,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052014290] [2024-11-22 13:53:46,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:46,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 13:53:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 13:53:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-22 13:53:46,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:46,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 258 flow. Second operand has 15 states, 15 states have (on average 8.066666666666666) internal successors, (121), 15 states have internal predecessors, (121), 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) [2024-11-22 13:53:46,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:46,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:46,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:47,176 INFO L124 PetriNetUnfolderBase]: 1311/2302 cut-off events. [2024-11-22 13:53:47,177 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-11-22 13:53:47,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5651 conditions, 2302 events. 1311/2302 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11988 event pairs, 360 based on Foata normal form. 1/1937 useless extension candidates. Maximal degree in co-relation 5636. Up to 727 conditions per place. [2024-11-22 13:53:47,187 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 51 selfloop transitions, 19 changer transitions 12/85 dead transitions. [2024-11-22 13:53:47,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 85 transitions, 540 flow [2024-11-22 13:53:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:53:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:53:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-11-22 13:53:47,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-11-22 13:53:47,189 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 258 flow. Second operand 9 states and 111 transitions. [2024-11-22 13:53:47,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 85 transitions, 540 flow [2024-11-22 13:53:47,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 518 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-22 13:53:47,195 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 308 flow [2024-11-22 13:53:47,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=308, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2024-11-22 13:53:47,196 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 32 predicate places. [2024-11-22 13:53:47,196 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 308 flow [2024-11-22 13:53:47,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.066666666666666) internal successors, (121), 15 states have internal predecessors, (121), 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) [2024-11-22 13:53:47,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:47,197 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:47,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:53:47,400 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,SelfDestructingSolverStorable5 [2024-11-22 13:53:47,401 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:47,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 997787277, now seen corresponding path program 3 times [2024-11-22 13:53:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:47,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895327726] [2024-11-22 13:53:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:53:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:47,423 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:53:47,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 13:53:47,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:47,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895327726] [2024-11-22 13:53:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895327726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:47,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031525642] [2024-11-22 13:53:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:53:47,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:47,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:47,476 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) [2024-11-22 13:53:47,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:53:47,531 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:53:47,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:47,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 13:53:47,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 13:53:47,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:53:47,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031525642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:47,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:47,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-11-22 13:53:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202637728] [2024-11-22 13:53:47,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:47,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:53:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:53:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:53:47,641 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:47,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:47,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:47,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:47,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:47,918 INFO L124 PetriNetUnfolderBase]: 2326/4079 cut-off events. [2024-11-22 13:53:47,918 INFO L125 PetriNetUnfolderBase]: For 4178/4178 co-relation queries the response was YES. [2024-11-22 13:53:47,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10284 conditions, 4079 events. 2326/4079 cut-off events. For 4178/4178 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 23766 event pairs, 936 based on Foata normal form. 55/3489 useless extension candidates. Maximal degree in co-relation 10267. Up to 1781 conditions per place. [2024-11-22 13:53:47,931 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 68 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-11-22 13:53:47,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 674 flow [2024-11-22 13:53:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:53:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:53:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-22 13:53:47,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-22 13:53:47,932 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 308 flow. Second operand 4 states and 72 transitions. [2024-11-22 13:53:47,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 674 flow [2024-11-22 13:53:47,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 616 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-22 13:53:47,940 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 454 flow [2024-11-22 13:53:47,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2024-11-22 13:53:47,941 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2024-11-22 13:53:47,941 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 454 flow [2024-11-22 13:53:47,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:47,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:47,942 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:47,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:53:48,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:48,146 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:48,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash 178691706, now seen corresponding path program 4 times [2024-11-22 13:53:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:48,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160720153] [2024-11-22 13:53:48,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:53:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:48,165 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:53:48,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:53:48,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:48,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160720153] [2024-11-22 13:53:48,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160720153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:48,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181380808] [2024-11-22 13:53:48,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:53:48,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:48,269 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) [2024-11-22 13:53:48,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:53:48,327 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:53:48,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:48,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 13:53:48,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:48,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-22 13:53:48,551 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:53:48,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-22 13:53:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:48,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:48,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-22 13:53:48,890 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-22 13:53:48,890 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 51 treesize of output 43 [2024-11-22 13:53:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:48,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181380808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:48,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:48,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2024-11-22 13:53:48,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278091014] [2024-11-22 13:53:48,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:48,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 13:53:48,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 13:53:48,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2024-11-22 13:53:48,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:48,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 454 flow. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 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) [2024-11-22 13:53:48,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:48,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:48,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:50,116 INFO L124 PetriNetUnfolderBase]: 3882/6831 cut-off events. [2024-11-22 13:53:50,117 INFO L125 PetriNetUnfolderBase]: For 11388/11388 co-relation queries the response was YES. [2024-11-22 13:53:50,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17961 conditions, 6831 events. 3882/6831 cut-off events. For 11388/11388 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 43271 event pairs, 599 based on Foata normal form. 132/5881 useless extension candidates. Maximal degree in co-relation 17944. Up to 1250 conditions per place. [2024-11-22 13:53:50,139 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 129 selfloop transitions, 37 changer transitions 96/265 dead transitions. [2024-11-22 13:53:50,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 265 transitions, 1732 flow [2024-11-22 13:53:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 13:53:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 13:53:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2024-11-22 13:53:50,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-11-22 13:53:50,141 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 454 flow. Second operand 20 states and 338 transitions. [2024-11-22 13:53:50,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 265 transitions, 1732 flow [2024-11-22 13:53:50,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 265 transitions, 1702 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-11-22 13:53:50,152 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 660 flow [2024-11-22 13:53:50,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=660, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2024-11-22 13:53:50,153 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 60 predicate places. [2024-11-22 13:53:50,153 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 660 flow [2024-11-22 13:53:50,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 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) [2024-11-22 13:53:50,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:50,153 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:50,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 13:53:50,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:50,354 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:50,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:50,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1647887852, now seen corresponding path program 5 times [2024-11-22 13:53:50,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:50,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342443867] [2024-11-22 13:53:50,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:53:50,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:50,367 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:53:50,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:53:50,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:50,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342443867] [2024-11-22 13:53:50,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342443867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:50,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556056583] [2024-11-22 13:53:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:53:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:50,483 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) [2024-11-22 13:53:50,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:53:50,543 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:53:50,543 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:50,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 13:53:50,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:53:50,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:50,599 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-22 13:53:50,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-11-22 13:53:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:53:50,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556056583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:50,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-22 13:53:50,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501958208] [2024-11-22 13:53:50,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:50,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:53:50,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:53:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:53:50,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:50,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 660 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2024-11-22 13:53:50,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:50,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:50,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:51,034 INFO L124 PetriNetUnfolderBase]: 2994/5271 cut-off events. [2024-11-22 13:53:51,034 INFO L125 PetriNetUnfolderBase]: For 17527/17527 co-relation queries the response was YES. [2024-11-22 13:53:51,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15343 conditions, 5271 events. 2994/5271 cut-off events. For 17527/17527 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 31718 event pairs, 675 based on Foata normal form. 3/4436 useless extension candidates. Maximal degree in co-relation 15314. Up to 1057 conditions per place. [2024-11-22 13:53:51,056 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 72 selfloop transitions, 32 changer transitions 22/129 dead transitions. [2024-11-22 13:53:51,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 1158 flow [2024-11-22 13:53:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:53:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:53:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-11-22 13:53:51,057 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-11-22 13:53:51,057 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 660 flow. Second operand 7 states and 124 transitions. [2024-11-22 13:53:51,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 1158 flow [2024-11-22 13:53:51,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 971 flow, removed 64 selfloop flow, removed 10 redundant places. [2024-11-22 13:53:51,099 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 599 flow [2024-11-22 13:53:51,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-11-22 13:53:51,100 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 53 predicate places. [2024-11-22 13:53:51,100 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 599 flow [2024-11-22 13:53:51,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2024-11-22 13:53:51,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:51,101 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:51,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 13:53:51,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:51,301 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:51,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash -128097924, now seen corresponding path program 6 times [2024-11-22 13:53:51,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:51,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328478640] [2024-11-22 13:53:51,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:53:51,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:51,313 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:53:51,313 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:53:51,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:51,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328478640] [2024-11-22 13:53:51,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328478640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:51,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328823142] [2024-11-22 13:53:51,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:53:51,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:51,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:51,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:51,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 13:53:51,443 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:53:51,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:51,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:53:51,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 13:53:51,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 13:53:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328823142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:51,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:51,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-22 13:53:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870125450] [2024-11-22 13:53:51,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:51,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 13:53:51,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 13:53:51,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-22 13:53:51,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:51,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 599 flow. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:51,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:51,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:51,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:51,927 INFO L124 PetriNetUnfolderBase]: 2672/4713 cut-off events. [2024-11-22 13:53:51,927 INFO L125 PetriNetUnfolderBase]: For 10367/10367 co-relation queries the response was YES. [2024-11-22 13:53:51,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12925 conditions, 4713 events. 2672/4713 cut-off events. For 10367/10367 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 28564 event pairs, 2345 based on Foata normal form. 12/3985 useless extension candidates. Maximal degree in co-relation 12899. Up to 4417 conditions per place. [2024-11-22 13:53:51,946 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 53 selfloop transitions, 3 changer transitions 29/88 dead transitions. [2024-11-22 13:53:51,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 88 transitions, 773 flow [2024-11-22 13:53:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:53:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:53:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-11-22 13:53:51,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-22 13:53:51,948 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 599 flow. Second operand 6 states and 82 transitions. [2024-11-22 13:53:51,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 88 transitions, 773 flow [2024-11-22 13:53:52,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 697 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-22 13:53:52,009 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 459 flow [2024-11-22 13:53:52,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2024-11-22 13:53:52,010 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2024-11-22 13:53:52,010 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 459 flow [2024-11-22 13:53:52,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:53:52,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:52,011 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:52,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 13:53:52,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:52,212 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:52,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash -951130530, now seen corresponding path program 7 times [2024-11-22 13:53:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:52,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866697466] [2024-11-22 13:53:52,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:53:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 13:53:52,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866697466] [2024-11-22 13:53:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866697466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699722187] [2024-11-22 13:53:52,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:53:52,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:52,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:52,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 13:53:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:53:52,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:53:52,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:53:52,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:53:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699722187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:52,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:52,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2024-11-22 13:53:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362102876] [2024-11-22 13:53:52,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:52,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 13:53:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 13:53:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2024-11-22 13:53:52,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:52,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 459 flow. Second operand has 16 states, 16 states have (on average 8.9375) internal successors, (143), 16 states have internal predecessors, (143), 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) [2024-11-22 13:53:52,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:52,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:52,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:53,199 INFO L124 PetriNetUnfolderBase]: 4122/7179 cut-off events. [2024-11-22 13:53:53,199 INFO L125 PetriNetUnfolderBase]: For 12505/12505 co-relation queries the response was YES. [2024-11-22 13:53:53,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19333 conditions, 7179 events. 4122/7179 cut-off events. For 12505/12505 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 44370 event pairs, 967 based on Foata normal form. 44/6103 useless extension candidates. Maximal degree in co-relation 19309. Up to 2060 conditions per place. [2024-11-22 13:53:53,225 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 77 selfloop transitions, 34 changer transitions 108/222 dead transitions. [2024-11-22 13:53:53,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 222 transitions, 1545 flow [2024-11-22 13:53:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 13:53:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 13:53:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 261 transitions. [2024-11-22 13:53:53,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5825892857142857 [2024-11-22 13:53:53,227 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 459 flow. Second operand 16 states and 261 transitions. [2024-11-22 13:53:53,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 222 transitions, 1545 flow [2024-11-22 13:53:53,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 222 transitions, 1530 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-22 13:53:53,244 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 751 flow [2024-11-22 13:53:53,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=751, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-11-22 13:53:53,245 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 57 predicate places. [2024-11-22 13:53:53,245 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 751 flow [2024-11-22 13:53:53,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.9375) internal successors, (143), 16 states have internal predecessors, (143), 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) [2024-11-22 13:53:53,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:53,245 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:53,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 13:53:53,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:53,450 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:53,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash -846417175, now seen corresponding path program 8 times [2024-11-22 13:53:53,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:53,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671755063] [2024-11-22 13:53:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:53:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:53,472 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:53:53,472 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:53,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:53,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671755063] [2024-11-22 13:53:53,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671755063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:53,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871130198] [2024-11-22 13:53:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:53:53,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:53,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:53,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:53,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 13:53:53,901 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:53:53,901 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:53,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 13:53:53,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:54,173 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:53:54,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-22 13:53:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:54,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:54,221 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:53:54,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 13:53:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:53:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871130198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:54,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:54,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-22 13:53:54,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267521834] [2024-11-22 13:53:54,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:54,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 13:53:54,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:54,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 13:53:54,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 13:53:54,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:54,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 751 flow. Second operand has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 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) [2024-11-22 13:53:54,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:54,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:54,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:56,532 INFO L124 PetriNetUnfolderBase]: 5591/9734 cut-off events. [2024-11-22 13:53:56,532 INFO L125 PetriNetUnfolderBase]: For 29217/29217 co-relation queries the response was YES. [2024-11-22 13:53:56,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27872 conditions, 9734 events. 5591/9734 cut-off events. For 29217/29217 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 62328 event pairs, 649 based on Foata normal form. 129/8331 useless extension candidates. Maximal degree in co-relation 27847. Up to 1800 conditions per place. [2024-11-22 13:53:56,567 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 235 selfloop transitions, 80 changer transitions 69/387 dead transitions. [2024-11-22 13:53:56,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 387 transitions, 2853 flow [2024-11-22 13:53:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-22 13:53:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-22 13:53:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 499 transitions. [2024-11-22 13:53:56,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.594047619047619 [2024-11-22 13:53:56,572 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 751 flow. Second operand 30 states and 499 transitions. [2024-11-22 13:53:56,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 387 transitions, 2853 flow [2024-11-22 13:53:56,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 387 transitions, 2641 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-11-22 13:53:56,695 INFO L231 Difference]: Finished difference. Result has 106 places, 106 transitions, 1361 flow [2024-11-22 13:53:56,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1361, PETRI_PLACES=106, PETRI_TRANSITIONS=106} [2024-11-22 13:53:56,696 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 79 predicate places. [2024-11-22 13:53:56,696 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 106 transitions, 1361 flow [2024-11-22 13:53:56,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 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) [2024-11-22 13:53:56,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:56,697 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:56,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 13:53:56,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 13:53:56,898 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:56,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -591025093, now seen corresponding path program 9 times [2024-11-22 13:53:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974747274] [2024-11-22 13:53:56,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:53:56,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:56,932 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:53:56,936 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 13:53:57,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974747274] [2024-11-22 13:53:57,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974747274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014751851] [2024-11-22 13:53:57,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:53:57,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:57,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:57,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 13:53:57,262 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:53:57,263 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:57,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 13:53:57,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 13:53:57,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:57,777 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:53:57,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 13:53:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 13:53:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014751851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:57,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-11-22 13:53:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888921613] [2024-11-22 13:53:57,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:57,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 13:53:57,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 13:53:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2024-11-22 13:53:57,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:57,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 106 transitions, 1361 flow. Second operand has 25 states, 25 states have (on average 7.6) internal successors, (190), 25 states have internal predecessors, (190), 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) [2024-11-22 13:53:57,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:57,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:57,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:53:59,023 INFO L124 PetriNetUnfolderBase]: 6259/10902 cut-off events. [2024-11-22 13:53:59,024 INFO L125 PetriNetUnfolderBase]: For 30980/30980 co-relation queries the response was YES. [2024-11-22 13:53:59,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31610 conditions, 10902 events. 6259/10902 cut-off events. For 30980/30980 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 73189 event pairs, 2539 based on Foata normal form. 2/9183 useless extension candidates. Maximal degree in co-relation 31574. Up to 5154 conditions per place. [2024-11-22 13:53:59,052 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 77 selfloop transitions, 8 changer transitions 119/207 dead transitions. [2024-11-22 13:53:59,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 207 transitions, 2363 flow [2024-11-22 13:53:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 13:53:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 13:53:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 168 transitions. [2024-11-22 13:53:59,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-22 13:53:59,055 INFO L175 Difference]: Start difference. First operand has 106 places, 106 transitions, 1361 flow. Second operand 12 states and 168 transitions. [2024-11-22 13:53:59,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 207 transitions, 2363 flow [2024-11-22 13:53:59,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 207 transitions, 2198 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-11-22 13:53:59,159 INFO L231 Difference]: Finished difference. Result has 111 places, 77 transitions, 828 flow [2024-11-22 13:53:59,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=828, PETRI_PLACES=111, PETRI_TRANSITIONS=77} [2024-11-22 13:53:59,159 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 84 predicate places. [2024-11-22 13:53:59,160 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 77 transitions, 828 flow [2024-11-22 13:53:59,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.6) internal successors, (190), 25 states have internal predecessors, (190), 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) [2024-11-22 13:53:59,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:53:59,160 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:53:59,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 13:53:59,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 13:53:59,364 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:53:59,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:53:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash -275602663, now seen corresponding path program 10 times [2024-11-22 13:53:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:53:59,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573256302] [2024-11-22 13:53:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:53:59,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:53:59,378 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:53:59,378 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:53:59,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:53:59,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573256302] [2024-11-22 13:53:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573256302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:53:59,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960443282] [2024-11-22 13:53:59,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:53:59,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:53:59,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:53:59,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:53:59,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 13:53:59,579 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:53:59,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:53:59,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 13:53:59,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:53:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:53:59,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:53:59,699 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-22 13:53:59,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-11-22 13:53:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:53:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960443282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:53:59,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:53:59,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 17 [2024-11-22 13:53:59,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18453381] [2024-11-22 13:53:59,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:53:59,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 13:53:59,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:53:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 13:53:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2024-11-22 13:53:59,721 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:53:59,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 77 transitions, 828 flow. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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) [2024-11-22 13:53:59,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:53:59,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:53:59,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:01,318 INFO L124 PetriNetUnfolderBase]: 7575/12968 cut-off events. [2024-11-22 13:54:01,318 INFO L125 PetriNetUnfolderBase]: For 48309/48309 co-relation queries the response was YES. [2024-11-22 13:54:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39093 conditions, 12968 events. 7575/12968 cut-off events. For 48309/48309 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 84584 event pairs, 702 based on Foata normal form. 37/10996 useless extension candidates. Maximal degree in co-relation 39056. Up to 2375 conditions per place. [2024-11-22 13:54:01,363 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 229 selfloop transitions, 125 changer transitions 87/444 dead transitions. [2024-11-22 13:54:01,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 444 transitions, 3735 flow [2024-11-22 13:54:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-22 13:54:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-22 13:54:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 531 transitions. [2024-11-22 13:54:01,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-11-22 13:54:01,368 INFO L175 Difference]: Start difference. First operand has 111 places, 77 transitions, 828 flow. Second operand 30 states and 531 transitions. [2024-11-22 13:54:01,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 444 transitions, 3735 flow [2024-11-22 13:54:01,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 444 transitions, 3200 flow, removed 216 selfloop flow, removed 19 redundant places. [2024-11-22 13:54:01,466 INFO L231 Difference]: Finished difference. Result has 123 places, 155 transitions, 2046 flow [2024-11-22 13:54:01,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2046, PETRI_PLACES=123, PETRI_TRANSITIONS=155} [2024-11-22 13:54:01,467 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-11-22 13:54:01,467 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 155 transitions, 2046 flow [2024-11-22 13:54:01,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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) [2024-11-22 13:54:01,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:01,468 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:01,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 13:54:01,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 13:54:01,672 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:01,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash -583367564, now seen corresponding path program 11 times [2024-11-22 13:54:01,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:01,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971518249] [2024-11-22 13:54:01,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:54:01,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:01,692 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-22 13:54:01,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:02,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:02,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971518249] [2024-11-22 13:54:02,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971518249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:02,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992464723] [2024-11-22 13:54:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:54:02,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:02,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:02,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 13:54:02,260 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-22 13:54:02,261 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:02,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 13:54:02,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:54:02,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:02,419 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-22 13:54:02,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-11-22 13:54:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:54:02,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992464723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:02,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:02,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 21 [2024-11-22 13:54:02,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713003822] [2024-11-22 13:54:02,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:02,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 13:54:02,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:02,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 13:54:02,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-22 13:54:02,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:02,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 155 transitions, 2046 flow. Second operand has 22 states, 22 states have (on average 8.045454545454545) internal successors, (177), 22 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:02,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:02,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:02,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:08,204 INFO L124 PetriNetUnfolderBase]: 20335/34733 cut-off events. [2024-11-22 13:54:08,204 INFO L125 PetriNetUnfolderBase]: For 125903/125903 co-relation queries the response was YES. [2024-11-22 13:54:08,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101185 conditions, 34733 events. 20335/34733 cut-off events. For 125903/125903 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 249853 event pairs, 1520 based on Foata normal form. 45/29420 useless extension candidates. Maximal degree in co-relation 101140. Up to 6350 conditions per place. [2024-11-22 13:54:08,381 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 735 selfloop transitions, 368 changer transitions 147/1253 dead transitions. [2024-11-22 13:54:08,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 1253 transitions, 12024 flow [2024-11-22 13:54:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-22 13:54:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-11-22 13:54:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 1406 transitions. [2024-11-22 13:54:08,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6521335807050093 [2024-11-22 13:54:08,384 INFO L175 Difference]: Start difference. First operand has 123 places, 155 transitions, 2046 flow. Second operand 77 states and 1406 transitions. [2024-11-22 13:54:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 1253 transitions, 12024 flow [2024-11-22 13:54:08,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 1253 transitions, 9695 flow, removed 1124 selfloop flow, removed 10 redundant places. [2024-11-22 13:54:08,669 INFO L231 Difference]: Finished difference. Result has 229 places, 426 transitions, 5298 flow [2024-11-22 13:54:08,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=5298, PETRI_PLACES=229, PETRI_TRANSITIONS=426} [2024-11-22 13:54:08,669 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 202 predicate places. [2024-11-22 13:54:08,669 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 426 transitions, 5298 flow [2024-11-22 13:54:08,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.045454545454545) internal successors, (177), 22 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:08,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:08,670 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:08,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 13:54:08,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 13:54:08,870 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:08,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:08,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1815935400, now seen corresponding path program 12 times [2024-11-22 13:54:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973862087] [2024-11-22 13:54:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:08,887 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-22 13:54:08,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-22 13:54:09,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:09,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973862087] [2024-11-22 13:54:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973862087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536385779] [2024-11-22 13:54:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:09,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:09,027 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:09,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 13:54:09,213 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-22 13:54:09,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:09,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 13:54:09,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:54:09,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:54:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536385779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:09,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:09,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2024-11-22 13:54:09,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56941837] [2024-11-22 13:54:09,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:09,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 13:54:09,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 13:54:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 13:54:09,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:09,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 426 transitions, 5298 flow. Second operand has 34 states, 34 states have (on average 8.058823529411764) internal successors, (274), 34 states have internal predecessors, (274), 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) [2024-11-22 13:54:09,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:09,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:09,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:18,130 INFO L124 PetriNetUnfolderBase]: 34427/60079 cut-off events. [2024-11-22 13:54:18,131 INFO L125 PetriNetUnfolderBase]: For 144248/144248 co-relation queries the response was YES. [2024-11-22 13:54:18,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160026 conditions, 60079 events. 34427/60079 cut-off events. For 144248/144248 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 519318 event pairs, 12565 based on Foata normal form. 1925/52404 useless extension candidates. Maximal degree in co-relation 159947. Up to 15397 conditions per place. [2024-11-22 13:54:18,928 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 173 selfloop transitions, 6 changer transitions 472/654 dead transitions. [2024-11-22 13:54:18,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 654 transitions, 8800 flow [2024-11-22 13:54:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 13:54:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 13:54:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 191 transitions. [2024-11-22 13:54:18,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4872448979591837 [2024-11-22 13:54:18,929 INFO L175 Difference]: Start difference. First operand has 229 places, 426 transitions, 5298 flow. Second operand 14 states and 191 transitions. [2024-11-22 13:54:18,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 654 transitions, 8800 flow [2024-11-22 13:54:20,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 654 transitions, 8570 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-11-22 13:54:20,825 INFO L231 Difference]: Finished difference. Result has 213 places, 182 transitions, 2776 flow [2024-11-22 13:54:20,825 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2776, PETRI_PLACES=213, PETRI_TRANSITIONS=182} [2024-11-22 13:54:20,826 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 186 predicate places. [2024-11-22 13:54:20,826 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 182 transitions, 2776 flow [2024-11-22 13:54:20,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.058823529411764) internal successors, (274), 34 states have internal predecessors, (274), 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) [2024-11-22 13:54:20,826 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:20,826 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:20,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 13:54:21,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 13:54:21,027 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:21,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1764936770, now seen corresponding path program 13 times [2024-11-22 13:54:21,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:21,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785740774] [2024-11-22 13:54:21,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:54:21,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-22 13:54:21,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785740774] [2024-11-22 13:54:21,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785740774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718737607] [2024-11-22 13:54:21,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:54:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:21,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:21,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 13:54:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:21,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:54:21,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-22 13:54:21,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:54:21,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718737607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:21,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:21,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2024-11-22 13:54:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657756219] [2024-11-22 13:54:21,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:21,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 13:54:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 13:54:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-11-22 13:54:21,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:21,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 182 transitions, 2776 flow. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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) [2024-11-22 13:54:21,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:21,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:21,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:24,264 INFO L124 PetriNetUnfolderBase]: 14843/25341 cut-off events. [2024-11-22 13:54:24,264 INFO L125 PetriNetUnfolderBase]: For 98042/98042 co-relation queries the response was YES. [2024-11-22 13:54:24,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75261 conditions, 25341 events. 14843/25341 cut-off events. For 98042/98042 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 183227 event pairs, 2554 based on Foata normal form. 22/21441 useless extension candidates. Maximal degree in co-relation 75176. Up to 6282 conditions per place. [2024-11-22 13:54:24,438 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 151 selfloop transitions, 208 changer transitions 0/362 dead transitions. [2024-11-22 13:54:24,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 362 transitions, 5827 flow [2024-11-22 13:54:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:54:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:54:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-22 13:54:24,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-11-22 13:54:24,440 INFO L175 Difference]: Start difference. First operand has 213 places, 182 transitions, 2776 flow. Second operand 7 states and 135 transitions. [2024-11-22 13:54:24,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 362 transitions, 5827 flow [2024-11-22 13:54:25,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 362 transitions, 4232 flow, removed 630 selfloop flow, removed 58 redundant places. [2024-11-22 13:54:25,195 INFO L231 Difference]: Finished difference. Result has 124 places, 292 transitions, 3876 flow [2024-11-22 13:54:25,195 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3876, PETRI_PLACES=124, PETRI_TRANSITIONS=292} [2024-11-22 13:54:25,196 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 97 predicate places. [2024-11-22 13:54:25,196 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 292 transitions, 3876 flow [2024-11-22 13:54:25,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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) [2024-11-22 13:54:25,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:25,196 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:25,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:25,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 13:54:25,397 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:25,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash -826604279, now seen corresponding path program 14 times [2024-11-22 13:54:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727696913] [2024-11-22 13:54:25,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:54:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:25,419 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:54:25,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:26,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:26,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727696913] [2024-11-22 13:54:26,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727696913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:26,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364045708] [2024-11-22 13:54:26,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:54:26,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:26,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:26,172 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:26,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 13:54:26,248 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:54:26,248 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:26,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 13:54:26,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:26,762 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:26,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-22 13:54:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 29 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:26,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:26,811 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:26,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 13:54:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:27,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364045708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:27,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:27,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2024-11-22 13:54:27,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268336518] [2024-11-22 13:54:27,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:27,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-22 13:54:27,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-22 13:54:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2024-11-22 13:54:27,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:27,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 292 transitions, 3876 flow. Second operand has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 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) [2024-11-22 13:54:27,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:27,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:27,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:36,220 INFO L124 PetriNetUnfolderBase]: 34821/59734 cut-off events. [2024-11-22 13:54:36,220 INFO L125 PetriNetUnfolderBase]: For 161696/161696 co-relation queries the response was YES. [2024-11-22 13:54:36,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170086 conditions, 59734 events. 34821/59734 cut-off events. For 161696/161696 co-relation queries the response was YES. Maximal size of possible extension queue 1339. Compared 490569 event pairs, 2834 based on Foata normal form. 433/50857 useless extension candidates. Maximal degree in co-relation 170048. Up to 11050 conditions per place. [2024-11-22 13:54:36,487 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 514 selfloop transitions, 575 changer transitions 183/1275 dead transitions. [2024-11-22 13:54:36,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 1275 transitions, 13582 flow [2024-11-22 13:54:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-22 13:54:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-11-22 13:54:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1048 transitions. [2024-11-22 13:54:36,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6135831381733021 [2024-11-22 13:54:36,492 INFO L175 Difference]: Start difference. First operand has 124 places, 292 transitions, 3876 flow. Second operand 61 states and 1048 transitions. [2024-11-22 13:54:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 1275 transitions, 13582 flow [2024-11-22 13:54:37,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1275 transitions, 13486 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-11-22 13:54:37,558 INFO L231 Difference]: Finished difference. Result has 211 places, 644 transitions, 10817 flow [2024-11-22 13:54:37,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=10817, PETRI_PLACES=211, PETRI_TRANSITIONS=644} [2024-11-22 13:54:37,558 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 184 predicate places. [2024-11-22 13:54:37,558 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 644 transitions, 10817 flow [2024-11-22 13:54:37,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 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) [2024-11-22 13:54:37,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:37,559 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:37,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 13:54:37,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:37,759 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:37,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1467000485, now seen corresponding path program 15 times [2024-11-22 13:54:37,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:37,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140420486] [2024-11-22 13:54:37,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:54:37,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:37,780 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 13:54:37,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-22 13:54:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140420486] [2024-11-22 13:54:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140420486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311447886] [2024-11-22 13:54:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:54:38,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:38,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:38,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 13:54:38,354 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 13:54:38,354 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:38,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 13:54:38,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 47 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 13:54:38,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:39,003 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:39,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 13:54:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 13:54:39,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311447886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:39,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:39,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2024-11-22 13:54:39,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54298144] [2024-11-22 13:54:39,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:39,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-22 13:54:39,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:39,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-22 13:54:39,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1270, Unknown=0, NotChecked=0, Total=1640 [2024-11-22 13:54:39,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:39,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 644 transitions, 10817 flow. Second operand has 41 states, 41 states have (on average 7.7560975609756095) internal successors, (318), 41 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:39,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:39,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:39,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand