./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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 ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:38:47,425 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:38:47,501 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:38:47,505 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:38:47,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:38:47,530 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:38:47,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:38:47,531 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:38:47,531 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:38:47,535 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:38:47,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:38:47,535 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:38:47,536 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:38:47,537 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:38:47,537 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:38:47,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:38:47,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:38:47,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:38:47,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:38:47,538 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:38:47,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:38:47,539 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:38:47,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:38:47,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:38:47,539 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:38:47,540 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:38:47,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:38:47,540 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:38:47,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:38:47,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:38:47,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:38:47,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:38:47,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:38:47,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:38:47,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:38:47,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:38:47,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:38:47,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:38:47,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:38:47,543 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:38:47,544 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:38:47,544 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:38:47,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:38:47,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-06-27 16:38:47,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:38:47,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:38:47,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:38:47,780 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:38:47,780 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:38:47,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-06-27 16:38:48,801 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:38:48,962 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:38:48,963 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-06-27 16:38:48,973 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e5e5eda/799ddbb2fe9147958606c1401eab8dd9/FLAGbffc67248 [2024-06-27 16:38:48,988 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e5e5eda/799ddbb2fe9147958606c1401eab8dd9 [2024-06-27 16:38:48,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:38:48,991 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:38:48,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:38:48,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:38:48,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:38:48,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:38:48" (1/1) ... [2024-06-27 16:38:48,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3242b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:48, skipping insertion in model container [2024-06-27 16:38:48,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:38:48" (1/1) ... [2024-06-27 16:38:49,021 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:38:49,162 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-06-27 16:38:49,168 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:38:49,174 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:38:49,196 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-06-27 16:38:49,198 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:38:49,210 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:38:49,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49 WrapperNode [2024-06-27 16:38:49,210 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:38:49,211 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:38:49,211 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:38:49,211 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:38:49,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,269 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 407 [2024-06-27 16:38:49,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:38:49,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:38:49,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:38:49,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:38:49,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,306 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:38:49,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,323 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,337 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,339 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,341 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:38:49,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:38:49,349 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:38:49,349 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:38:49,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (1/1) ... [2024-06-27 16:38:49,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:38:49,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:49,373 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) [2024-06-27 16:38:49,375 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 [2024-06-27 16:38:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:38:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:38:49,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:38:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:38:49,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:38:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:38:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:38:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:38:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:38:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:38:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:38:49,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:38:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:38:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:38:49,420 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:38:49,526 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:38:49,528 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:38:49,973 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:38:49,973 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:38:50,401 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:38:50,402 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:38:50,402 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:38:50 BoogieIcfgContainer [2024-06-27 16:38:50,402 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:38:50,404 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:38:50,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:38:50,407 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:38:50,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:38:48" (1/3) ... [2024-06-27 16:38:50,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cd243b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:38:50, skipping insertion in model container [2024-06-27 16:38:50,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:38:49" (2/3) ... [2024-06-27 16:38:50,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cd243b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:38:50, skipping insertion in model container [2024-06-27 16:38:50,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:38:50" (3/3) ... [2024-06-27 16:38:50,410 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-06-27 16:38:50,418 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:38:50,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:38:50,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:38:50,425 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:38:50,495 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:38:50,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-06-27 16:38:50,555 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-06-27 16:38:50,555 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:38:50,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-27 16:38:50,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-06-27 16:38:50,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-06-27 16:38:50,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:38:50,579 INFO L357 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, mHoare=true, 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;@3f3046fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:38:50,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:38:50,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:38:50,591 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-06-27 16:38:50,591 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:38:50,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:50,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:50,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:50,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1593845448, now seen corresponding path program 1 times [2024-06-27 16:38:50,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:50,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223658343] [2024-06-27 16:38:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:50,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:38:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223658343] [2024-06-27 16:38:51,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223658343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:38:51,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:38:51,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:38:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571622294] [2024-06-27 16:38:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:38:51,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:38:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:38:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:38:51,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:51,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-27 16:38:51,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:51,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:51,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:51,248 INFO L124 PetriNetUnfolderBase]: 202/329 cut-off events. [2024-06-27 16:38:51,248 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 16:38:51,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 329 events. 202/329 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1005 event pairs, 138 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 620. Up to 327 conditions per place. [2024-06-27 16:38:51,252 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2024-06-27 16:38:51,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 134 flow [2024-06-27 16:38:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:38:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:38:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-06-27 16:38:51,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-06-27 16:38:51,262 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 3 states and 43 transitions. [2024-06-27 16:38:51,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 134 flow [2024-06-27 16:38:51,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:38:51,266 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 84 flow [2024-06-27 16:38:51,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2024-06-27 16:38:51,269 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-06-27 16:38:51,269 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 84 flow [2024-06-27 16:38:51,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-27 16:38:51,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:51,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:38:51,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:51,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1120329308, now seen corresponding path program 1 times [2024-06-27 16:38:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:51,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585026611] [2024-06-27 16:38:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:38:51,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:51,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585026611] [2024-06-27 16:38:51,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585026611] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:51,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242329091] [2024-06-27 16:38:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:51,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:51,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:51,473 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) [2024-06-27 16:38:51,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:38:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:51,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:38:51,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:38:51,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:38:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242329091] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:51,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-06-27 16:38:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768660205] [2024-06-27 16:38:51,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:38:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:38:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:38:51,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:51,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 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) [2024-06-27 16:38:51,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:51,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:51,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:51,821 INFO L124 PetriNetUnfolderBase]: 202/335 cut-off events. [2024-06-27 16:38:51,822 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 16:38:51,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 335 events. 202/335 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 999 event pairs, 138 based on Foata normal form. 3/275 useless extension candidates. Maximal degree in co-relation 666. Up to 327 conditions per place. [2024-06-27 16:38:51,824 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2024-06-27 16:38:51,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 180 flow [2024-06-27 16:38:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:38:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:38:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-06-27 16:38:51,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2024-06-27 16:38:51,825 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 6 states and 60 transitions. [2024-06-27 16:38:51,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 180 flow [2024-06-27 16:38:51,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:38:51,827 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 146 flow [2024-06-27 16:38:51,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-06-27 16:38:51,827 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-06-27 16:38:51,828 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2024-06-27 16:38:51,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 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) [2024-06-27 16:38:51,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:51,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:51,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:52,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:52,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:52,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1411407270, now seen corresponding path program 2 times [2024-06-27 16:38:52,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:52,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080700157] [2024-06-27 16:38:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:52,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:38:52,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080700157] [2024-06-27 16:38:52,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080700157] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959023073] [2024-06-27 16:38:52,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:38:52,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:52,225 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) [2024-06-27 16:38:52,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:38:52,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:38:52,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:52,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 16:38:52,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-27 16:38:52,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:38:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959023073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:38:52,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:38:52,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-06-27 16:38:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600239322] [2024-06-27 16:38:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:38:52,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:38:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:38:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:38:52,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:52,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2024-06-27 16:38:52,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:52,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:52,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:53,003 INFO L124 PetriNetUnfolderBase]: 244/430 cut-off events. [2024-06-27 16:38:53,003 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:38:53,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 430 events. 244/430 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1540 event pairs, 138 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 848. Up to 319 conditions per place. [2024-06-27 16:38:53,006 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 1 changer transitions 9/56 dead transitions. [2024-06-27 16:38:53,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 299 flow [2024-06-27 16:38:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:38:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:38:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-06-27 16:38:53,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2024-06-27 16:38:53,007 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 146 flow. Second operand 4 states and 61 transitions. [2024-06-27 16:38:53,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 299 flow [2024-06-27 16:38:53,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 283 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:38:53,009 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 139 flow [2024-06-27 16:38:53,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-06-27 16:38:53,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-27 16:38:53,010 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 139 flow [2024-06-27 16:38:53,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2024-06-27 16:38:53,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:53,010 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:53,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:53,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-06-27 16:38:53,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:53,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:53,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1556262304, now seen corresponding path program 3 times [2024-06-27 16:38:53,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:53,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269142359] [2024-06-27 16:38:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:53,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:38:53,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269142359] [2024-06-27 16:38:53,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269142359] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667480499] [2024-06-27 16:38:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:38:53,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:53,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:53,330 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) [2024-06-27 16:38:53,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:38:53,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:38:53,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:53,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 16:38:53,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-27 16:38:53,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:38:53,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667480499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:38:53,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:38:53,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-06-27 16:38:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100727061] [2024-06-27 16:38:53,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:38:53,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:38:53,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:38:53,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:38:53,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:53,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2024-06-27 16:38:53,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:53,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:53,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:53,895 INFO L124 PetriNetUnfolderBase]: 268/487 cut-off events. [2024-06-27 16:38:53,895 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-06-27 16:38:53,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 487 events. 268/487 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1774 event pairs, 181 based on Foata normal form. 5/436 useless extension candidates. Maximal degree in co-relation 1048. Up to 393 conditions per place. [2024-06-27 16:38:53,898 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 1 changer transitions 7/54 dead transitions. [2024-06-27 16:38:53,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 288 flow [2024-06-27 16:38:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:38:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:38:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-06-27 16:38:53,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2024-06-27 16:38:53,899 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 139 flow. Second operand 4 states and 59 transitions. [2024-06-27 16:38:53,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 288 flow [2024-06-27 16:38:53,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 282 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 16:38:53,901 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 145 flow [2024-06-27 16:38:53,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-06-27 16:38:53,902 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-27 16:38:53,902 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 145 flow [2024-06-27 16:38:53,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2024-06-27 16:38:53,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:53,903 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:53,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:54,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:54,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:54,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2075253266, now seen corresponding path program 1 times [2024-06-27 16:38:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:54,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101073023] [2024-06-27 16:38:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:54,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-27 16:38:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101073023] [2024-06-27 16:38:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101073023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:38:54,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:38:54,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:38:54,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959826152] [2024-06-27 16:38:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:38:54,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:38:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:38:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:38:54,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:54,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 145 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) [2024-06-27 16:38:54,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:54,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:54,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:54,312 INFO L124 PetriNetUnfolderBase]: 192/347 cut-off events. [2024-06-27 16:38:54,312 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-06-27 16:38:54,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 347 events. 192/347 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1052 event pairs, 73 based on Foata normal form. 21/336 useless extension candidates. Maximal degree in co-relation 777. Up to 271 conditions per place. [2024-06-27 16:38:54,314 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 39 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-06-27 16:38:54,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 263 flow [2024-06-27 16:38:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:38:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:38:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-27 16:38:54,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-27 16:38:54,316 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 145 flow. Second operand 3 states and 49 transitions. [2024-06-27 16:38:54,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 263 flow [2024-06-27 16:38:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 260 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 16:38:54,317 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 148 flow [2024-06-27 16:38:54,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-06-27 16:38:54,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-27 16:38:54,318 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 148 flow [2024-06-27 16:38:54,319 INFO L496 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) [2024-06-27 16:38:54,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:54,319 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:54,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:38:54,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:54,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1291654264, now seen corresponding path program 1 times [2024-06-27 16:38:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280992635] [2024-06-27 16:38:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:38:54,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:54,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280992635] [2024-06-27 16:38:54,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280992635] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:54,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247914677] [2024-06-27 16:38:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:54,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:54,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:54,426 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) [2024-06-27 16:38:54,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:38:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:54,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:38:54,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:38:54,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:38:54,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247914677] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:54,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:54,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-06-27 16:38:54,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72577319] [2024-06-27 16:38:54,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:54,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:38:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:38:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:38:54,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:54,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 148 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2024-06-27 16:38:54,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:54,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:54,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:54,759 INFO L124 PetriNetUnfolderBase]: 171/306 cut-off events. [2024-06-27 16:38:54,759 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-06-27 16:38:54,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 306 events. 171/306 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 834 event pairs, 128 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 667. Up to 296 conditions per place. [2024-06-27 16:38:54,760 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2024-06-27 16:38:54,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 236 flow [2024-06-27 16:38:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:38:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:38:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2024-06-27 16:38:54,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24789915966386555 [2024-06-27 16:38:54,762 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 148 flow. Second operand 7 states and 59 transitions. [2024-06-27 16:38:54,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 236 flow [2024-06-27 16:38:54,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 228 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 16:38:54,763 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 186 flow [2024-06-27 16:38:54,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-06-27 16:38:54,764 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-27 16:38:54,764 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 186 flow [2024-06-27 16:38:54,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2024-06-27 16:38:54,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:54,764 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:54,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 16:38:54,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:54,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:54,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1270998506, now seen corresponding path program 2 times [2024-06-27 16:38:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:54,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104281726] [2024-06-27 16:38:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:55,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104281726] [2024-06-27 16:38:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104281726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:38:55,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:38:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:38:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63364061] [2024-06-27 16:38:55,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:38:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:38:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:38:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:38:55,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:55,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 186 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) [2024-06-27 16:38:55,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:55,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:55,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:55,196 INFO L124 PetriNetUnfolderBase]: 240/423 cut-off events. [2024-06-27 16:38:55,197 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-27 16:38:55,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 423 events. 240/423 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1309 event pairs, 139 based on Foata normal form. 16/386 useless extension candidates. Maximal degree in co-relation 885. Up to 306 conditions per place. [2024-06-27 16:38:55,198 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 47 selfloop transitions, 3 changer transitions 1/52 dead transitions. [2024-06-27 16:38:55,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 317 flow [2024-06-27 16:38:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:38:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:38:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-27 16:38:55,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-27 16:38:55,199 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 186 flow. Second operand 3 states and 49 transitions. [2024-06-27 16:38:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 317 flow [2024-06-27 16:38:55,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 293 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 16:38:55,201 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 177 flow [2024-06-27 16:38:55,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-06-27 16:38:55,202 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-06-27 16:38:55,202 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 177 flow [2024-06-27 16:38:55,202 INFO L496 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) [2024-06-27 16:38:55,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:55,202 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:55,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:38:55,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:55,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1017083656, now seen corresponding path program 1 times [2024-06-27 16:38:55,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:55,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895633528] [2024-06-27 16:38:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:55,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-06-27 16:38:55,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895633528] [2024-06-27 16:38:55,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895633528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:38:55,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:38:55,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:38:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029378070] [2024-06-27 16:38:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:38:55,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:38:55,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:38:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:38:55,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:38:55,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-06-27 16:38:55,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:55,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:38:55,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:55,432 INFO L124 PetriNetUnfolderBase]: 333/579 cut-off events. [2024-06-27 16:38:55,432 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-06-27 16:38:55,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 579 events. 333/579 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1979 event pairs, 191 based on Foata normal form. 21/558 useless extension candidates. Maximal degree in co-relation 1313. Up to 423 conditions per place. [2024-06-27 16:38:55,434 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 48 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2024-06-27 16:38:55,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 320 flow [2024-06-27 16:38:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:38:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:38:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-06-27 16:38:55,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-27 16:38:55,435 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 177 flow. Second operand 3 states and 48 transitions. [2024-06-27 16:38:55,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 320 flow [2024-06-27 16:38:55,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:38:55,437 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 189 flow [2024-06-27 16:38:55,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-27 16:38:55,437 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-06-27 16:38:55,437 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 189 flow [2024-06-27 16:38:55,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-06-27 16:38:55,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:55,438 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:55,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:38:55,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:55,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:55,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1297553171, now seen corresponding path program 1 times [2024-06-27 16:38:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:55,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283590581] [2024-06-27 16:38:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:55,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:39:00,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283590581] [2024-06-27 16:39:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283590581] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723012002] [2024-06-27 16:39:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:00,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:00,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:00,824 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) [2024-06-27 16:39:00,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:39:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:01,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:39:01,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:01,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:01,914 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 324 treesize of output 276 [2024-06-27 16:39:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:02,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:05,379 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:39:05,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 355 treesize of output 320 [2024-06-27 16:39:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723012002] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:06,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 34 [2024-06-27 16:39:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312398197] [2024-06-27 16:39:06,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:06,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:39:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:39:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:39:06,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:39:06,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 189 flow. Second operand has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 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) [2024-06-27 16:39:06,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:06,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:39:06,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:08,871 INFO L124 PetriNetUnfolderBase]: 682/1176 cut-off events. [2024-06-27 16:39:08,872 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-06-27 16:39:08,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2904 conditions, 1176 events. 682/1176 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5082 event pairs, 133 based on Foata normal form. 1/1177 useless extension candidates. Maximal degree in co-relation 2838. Up to 273 conditions per place. [2024-06-27 16:39:08,877 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 48 changer transitions 16/164 dead transitions. [2024-06-27 16:39:08,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 164 transitions, 914 flow [2024-06-27 16:39:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:39:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:39:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 251 transitions. [2024-06-27 16:39:08,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2381404174573055 [2024-06-27 16:39:08,879 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 189 flow. Second operand 31 states and 251 transitions. [2024-06-27 16:39:08,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 164 transitions, 914 flow [2024-06-27 16:39:08,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 164 transitions, 899 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:39:08,883 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 486 flow [2024-06-27 16:39:08,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=486, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-06-27 16:39:08,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-27 16:39:08,884 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 486 flow [2024-06-27 16:39:08,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 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) [2024-06-27 16:39:08,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:08,885 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:08,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:09,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:09,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:09,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:09,099 INFO L85 PathProgramCache]: Analyzing trace with hash 552162979, now seen corresponding path program 2 times [2024-06-27 16:39:09,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:09,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56501538] [2024-06-27 16:39:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:39:13,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:13,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56501538] [2024-06-27 16:39:13,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56501538] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:13,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857859585] [2024-06-27 16:39:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:39:13,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:13,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:13,701 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) [2024-06-27 16:39:13,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:39:13,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:39:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:13,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 57 conjunts are in the unsatisfiable core [2024-06-27 16:39:13,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:14,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:14,902 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 326 treesize of output 274 [2024-06-27 16:39:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:15,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:17,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:17,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 376 treesize of output 354 [2024-06-27 16:39:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:18,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857859585] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:18,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:18,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 8] total 37 [2024-06-27 16:39:18,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459925309] [2024-06-27 16:39:18,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:18,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 16:39:18,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 16:39:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 16:39:18,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:39:18,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 486 flow. Second operand has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2024-06-27 16:39:18,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:18,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:39:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:21,479 INFO L124 PetriNetUnfolderBase]: 999/1758 cut-off events. [2024-06-27 16:39:21,479 INFO L125 PetriNetUnfolderBase]: For 1433/1433 co-relation queries the response was YES. [2024-06-27 16:39:21,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4845 conditions, 1758 events. 999/1758 cut-off events. For 1433/1433 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8619 event pairs, 240 based on Foata normal form. 1/1759 useless extension candidates. Maximal degree in co-relation 4805. Up to 580 conditions per place. [2024-06-27 16:39:21,487 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 114 selfloop transitions, 53 changer transitions 12/180 dead transitions. [2024-06-27 16:39:21,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 180 transitions, 1228 flow [2024-06-27 16:39:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:39:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:39:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 241 transitions. [2024-06-27 16:39:21,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23627450980392156 [2024-06-27 16:39:21,491 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 486 flow. Second operand 30 states and 241 transitions. [2024-06-27 16:39:21,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 180 transitions, 1228 flow [2024-06-27 16:39:21,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 180 transitions, 1022 flow, removed 75 selfloop flow, removed 14 redundant places. [2024-06-27 16:39:21,500 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 563 flow [2024-06-27 16:39:21,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=563, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2024-06-27 16:39:21,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-27 16:39:21,501 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 563 flow [2024-06-27 16:39:21,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2024-06-27 16:39:21,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:21,502 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:21,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:21,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:21,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:21,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1617631143, now seen corresponding path program 3 times [2024-06-27 16:39:21,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994504264] [2024-06-27 16:39:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:21,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:39:25,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:25,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994504264] [2024-06-27 16:39:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994504264] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:25,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660460642] [2024-06-27 16:39:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:39:25,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:25,721 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) [2024-06-27 16:39:25,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:39:25,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:39:25,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:25,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 57 conjunts are in the unsatisfiable core [2024-06-27 16:39:25,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:26,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:26,852 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 326 treesize of output 274 [2024-06-27 16:39:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:27,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:29,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:29,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 388 treesize of output 360 [2024-06-27 16:39:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:30,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660460642] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:30,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 8] total 38 [2024-06-27 16:39:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100135454] [2024-06-27 16:39:30,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:30,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 16:39:30,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:30,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 16:39:30,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 16:39:30,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:39:30,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 563 flow. Second operand has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 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) [2024-06-27 16:39:30,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:30,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:39:30,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:34,312 INFO L124 PetriNetUnfolderBase]: 1261/2228 cut-off events. [2024-06-27 16:39:34,313 INFO L125 PetriNetUnfolderBase]: For 2560/2560 co-relation queries the response was YES. [2024-06-27 16:39:34,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6390 conditions, 2228 events. 1261/2228 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11702 event pairs, 216 based on Foata normal form. 2/2227 useless extension candidates. Maximal degree in co-relation 6342. Up to 608 conditions per place. [2024-06-27 16:39:34,323 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 147 selfloop transitions, 75 changer transitions 33/256 dead transitions. [2024-06-27 16:39:34,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 256 transitions, 1641 flow [2024-06-27 16:39:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 16:39:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 16:39:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 335 transitions. [2024-06-27 16:39:34,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2592879256965944 [2024-06-27 16:39:34,336 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 563 flow. Second operand 38 states and 335 transitions. [2024-06-27 16:39:34,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 256 transitions, 1641 flow [2024-06-27 16:39:34,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 256 transitions, 1576 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-06-27 16:39:34,361 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 870 flow [2024-06-27 16:39:34,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=870, PETRI_PLACES=125, PETRI_TRANSITIONS=115} [2024-06-27 16:39:34,362 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-27 16:39:34,362 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 870 flow [2024-06-27 16:39:34,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 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) [2024-06-27 16:39:34,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:34,362 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:34,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:34,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:34,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1530775621, now seen corresponding path program 4 times [2024-06-27 16:39:34,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:34,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136167544] [2024-06-27 16:39:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:39:38,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:38,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136167544] [2024-06-27 16:39:38,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136167544] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:38,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525917892] [2024-06-27 16:39:38,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:39:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:38,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:38,535 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) [2024-06-27 16:39:38,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:39:38,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:39:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:38,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 70 conjunts are in the unsatisfiable core [2024-06-27 16:39:38,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:38,842 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 15 treesize of output 1 [2024-06-27 16:39:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:39:38,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:39:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:39:38,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:39:38,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:39:38,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:39:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:39:38,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:39:40,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:40,190 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 336 treesize of output 276 [2024-06-27 16:39:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:41,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525917892] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:44,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 8] total 40 [2024-06-27 16:39:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173838854] [2024-06-27 16:39:44,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-06-27 16:39:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-06-27 16:39:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2024-06-27 16:39:44,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:39:44,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 870 flow. Second operand has 40 states, 40 states have (on average 5.35) internal successors, (214), 40 states have internal predecessors, (214), 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) [2024-06-27 16:39:44,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:44,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:39:44,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:51,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:40:04,592 INFO L124 PetriNetUnfolderBase]: 1602/2850 cut-off events. [2024-06-27 16:40:04,593 INFO L125 PetriNetUnfolderBase]: For 10884/10884 co-relation queries the response was YES. [2024-06-27 16:40:04,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10544 conditions, 2850 events. 1602/2850 cut-off events. For 10884/10884 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15941 event pairs, 391 based on Foata normal form. 1/2851 useless extension candidates. Maximal degree in co-relation 10480. Up to 726 conditions per place. [2024-06-27 16:40:04,611 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 142 selfloop transitions, 74 changer transitions 12/229 dead transitions. [2024-06-27 16:40:04,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 1937 flow [2024-06-27 16:40:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:40:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:40:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 216 transitions. [2024-06-27 16:40:04,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2541176470588235 [2024-06-27 16:40:04,613 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 870 flow. Second operand 25 states and 216 transitions. [2024-06-27 16:40:04,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 1937 flow [2024-06-27 16:40:04,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 229 transitions, 1788 flow, removed 38 selfloop flow, removed 22 redundant places. [2024-06-27 16:40:04,641 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 1196 flow [2024-06-27 16:40:04,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1196, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-06-27 16:40:04,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-06-27 16:40:04,644 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 1196 flow [2024-06-27 16:40:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.35) internal successors, (214), 40 states have internal predecessors, (214), 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) [2024-06-27 16:40:04,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:04,644 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:04,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 16:40:04,856 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:04,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash -551727749, now seen corresponding path program 5 times [2024-06-27 16:40:04,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:04,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604750420] [2024-06-27 16:40:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:04,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:40:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:08,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604750420] [2024-06-27 16:40:08,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604750420] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:08,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165185183] [2024-06-27 16:40:08,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:40:08,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:08,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:08,428 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) [2024-06-27 16:40:08,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:40:08,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:40:08,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:08,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 51 conjunts are in the unsatisfiable core [2024-06-27 16:40:08,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:09,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:09,694 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 323 treesize of output 271 [2024-06-27 16:40:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:10,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:12,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:12,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 417 treesize of output 395 [2024-06-27 16:40:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165185183] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:13,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 37 [2024-06-27 16:40:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924164616] [2024-06-27 16:40:13,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 16:40:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 16:40:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 16:40:13,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:40:13,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 1196 flow. Second operand has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2024-06-27 16:40:13,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:13,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:40:13,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:16,626 INFO L124 PetriNetUnfolderBase]: 1767/3133 cut-off events. [2024-06-27 16:40:16,627 INFO L125 PetriNetUnfolderBase]: For 16249/16249 co-relation queries the response was YES. [2024-06-27 16:40:16,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12332 conditions, 3133 events. 1767/3133 cut-off events. For 16249/16249 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18142 event pairs, 505 based on Foata normal form. 1/3134 useless extension candidates. Maximal degree in co-relation 12264. Up to 1596 conditions per place. [2024-06-27 16:40:16,663 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 141 selfloop transitions, 85 changer transitions 17/244 dead transitions. [2024-06-27 16:40:16,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 244 transitions, 2385 flow [2024-06-27 16:40:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:40:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:40:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 239 transitions. [2024-06-27 16:40:16,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2510504201680672 [2024-06-27 16:40:16,680 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 1196 flow. Second operand 28 states and 239 transitions. [2024-06-27 16:40:16,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 244 transitions, 2385 flow [2024-06-27 16:40:16,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 244 transitions, 2143 flow, removed 91 selfloop flow, removed 14 redundant places. [2024-06-27 16:40:16,748 INFO L231 Difference]: Finished difference. Result has 150 places, 153 transitions, 1445 flow [2024-06-27 16:40:16,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1445, PETRI_PLACES=150, PETRI_TRANSITIONS=153} [2024-06-27 16:40:16,749 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-27 16:40:16,749 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 153 transitions, 1445 flow [2024-06-27 16:40:16,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2024-06-27 16:40:16,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:16,750 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:16,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:16,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 16:40:16,957 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:16,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash 15021887, now seen corresponding path program 6 times [2024-06-27 16:40:16,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:16,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258050398] [2024-06-27 16:40:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:16,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:40:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258050398] [2024-06-27 16:40:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258050398] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575058073] [2024-06-27 16:40:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:40:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:20,446 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) [2024-06-27 16:40:20,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:40:20,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:40:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:20,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 57 conjunts are in the unsatisfiable core [2024-06-27 16:40:20,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:21,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:21,706 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 326 treesize of output 274 [2024-06-27 16:40:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:22,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:25,044 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:40:25,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 344 treesize of output 309 [2024-06-27 16:40:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:25,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575058073] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:25,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:25,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 9] total 40 [2024-06-27 16:40:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843686635] [2024-06-27 16:40:25,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:25,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-06-27 16:40:25,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-06-27 16:40:25,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2024-06-27 16:40:25,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:40:25,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 153 transitions, 1445 flow. Second operand has 40 states, 40 states have (on average 5.3) internal successors, (212), 40 states have internal predecessors, (212), 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) [2024-06-27 16:40:25,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:25,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:40:25,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:31,286 INFO L124 PetriNetUnfolderBase]: 1827/3252 cut-off events. [2024-06-27 16:40:31,286 INFO L125 PetriNetUnfolderBase]: For 12665/12665 co-relation queries the response was YES. [2024-06-27 16:40:31,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12851 conditions, 3252 events. 1827/3252 cut-off events. For 12665/12665 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19041 event pairs, 380 based on Foata normal form. 2/3254 useless extension candidates. Maximal degree in co-relation 12779. Up to 696 conditions per place. [2024-06-27 16:40:31,308 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 170 selfloop transitions, 111 changer transitions 26/308 dead transitions. [2024-06-27 16:40:31,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 308 transitions, 2860 flow [2024-06-27 16:40:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-27 16:40:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-27 16:40:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 344 transitions. [2024-06-27 16:40:31,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23529411764705882 [2024-06-27 16:40:31,319 INFO L175 Difference]: Start difference. First operand has 150 places, 153 transitions, 1445 flow. Second operand 43 states and 344 transitions. [2024-06-27 16:40:31,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 308 transitions, 2860 flow [2024-06-27 16:40:31,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 308 transitions, 2744 flow, removed 27 selfloop flow, removed 17 redundant places. [2024-06-27 16:40:31,359 INFO L231 Difference]: Finished difference. Result has 186 places, 172 transitions, 1803 flow [2024-06-27 16:40:31,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1803, PETRI_PLACES=186, PETRI_TRANSITIONS=172} [2024-06-27 16:40:31,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-27 16:40:31,360 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 172 transitions, 1803 flow [2024-06-27 16:40:31,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.3) internal successors, (212), 40 states have internal predecessors, (212), 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) [2024-06-27 16:40:31,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:31,360 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:31,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 16:40:31,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 16:40:31,565 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:31,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1771095389, now seen corresponding path program 7 times [2024-06-27 16:40:31,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:31,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047218645] [2024-06-27 16:40:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:31,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:40:34,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:34,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047218645] [2024-06-27 16:40:34,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047218645] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:34,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458322982] [2024-06-27 16:40:34,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:40:34,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:34,774 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) [2024-06-27 16:40:34,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:40:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:34,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 16:40:34,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:36,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:36,226 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 302 treesize of output 254 [2024-06-27 16:40:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:36,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:39,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:39,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 396 treesize of output 374 [2024-06-27 16:40:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458322982] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:40,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:40,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 33 [2024-06-27 16:40:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694950978] [2024-06-27 16:40:40,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:40:40,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:40:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:40:40,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:40:40,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 172 transitions, 1803 flow. Second operand has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:40:40,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:40,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:40:40,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:43,674 INFO L124 PetriNetUnfolderBase]: 2133/3822 cut-off events. [2024-06-27 16:40:43,674 INFO L125 PetriNetUnfolderBase]: For 25162/25162 co-relation queries the response was YES. [2024-06-27 16:40:43,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18059 conditions, 3822 events. 2133/3822 cut-off events. For 25162/25162 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23073 event pairs, 642 based on Foata normal form. 4/3823 useless extension candidates. Maximal degree in co-relation 17975. Up to 1376 conditions per place. [2024-06-27 16:40:43,696 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 158 selfloop transitions, 104 changer transitions 38/301 dead transitions. [2024-06-27 16:40:43,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 301 transitions, 3484 flow [2024-06-27 16:40:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 16:40:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 16:40:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 274 transitions. [2024-06-27 16:40:43,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24420677361853832 [2024-06-27 16:40:43,698 INFO L175 Difference]: Start difference. First operand has 186 places, 172 transitions, 1803 flow. Second operand 33 states and 274 transitions. [2024-06-27 16:40:43,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 301 transitions, 3484 flow [2024-06-27 16:40:43,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 301 transitions, 3193 flow, removed 46 selfloop flow, removed 29 redundant places. [2024-06-27 16:40:43,753 INFO L231 Difference]: Finished difference. Result has 198 places, 192 transitions, 2090 flow [2024-06-27 16:40:43,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2090, PETRI_PLACES=198, PETRI_TRANSITIONS=192} [2024-06-27 16:40:43,754 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-27 16:40:43,754 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 192 transitions, 2090 flow [2024-06-27 16:40:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:40:43,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:43,755 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:43,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:43,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:40:43,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:43,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2085424011, now seen corresponding path program 8 times [2024-06-27 16:40:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:43,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737415929] [2024-06-27 16:40:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:40:46,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:46,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737415929] [2024-06-27 16:40:46,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737415929] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:46,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787804723] [2024-06-27 16:40:46,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:40:46,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:46,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:46,213 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) [2024-06-27 16:40:46,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:40:46,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:40:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:46,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:40:46,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:46,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:47,514 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:40:47,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:40:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787804723] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:47,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:47,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 35 [2024-06-27 16:40:47,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618843369] [2024-06-27 16:40:47,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:47,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:40:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:40:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:40:47,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:40:47,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 192 transitions, 2090 flow. Second operand has 35 states, 35 states have (on average 5.628571428571429) internal successors, (197), 35 states have internal predecessors, (197), 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) [2024-06-27 16:40:47,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:47,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:40:47,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:50,074 INFO L124 PetriNetUnfolderBase]: 2083/3708 cut-off events. [2024-06-27 16:40:50,074 INFO L125 PetriNetUnfolderBase]: For 26816/26816 co-relation queries the response was YES. [2024-06-27 16:40:50,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18135 conditions, 3708 events. 2083/3708 cut-off events. For 26816/26816 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22526 event pairs, 343 based on Foata normal form. 16/3721 useless extension candidates. Maximal degree in co-relation 18045. Up to 704 conditions per place. [2024-06-27 16:40:50,102 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 192 selfloop transitions, 147 changer transitions 14/354 dead transitions. [2024-06-27 16:40:50,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 354 transitions, 4220 flow [2024-06-27 16:40:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 16:40:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 16:40:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 286 transitions. [2024-06-27 16:40:50,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2549019607843137 [2024-06-27 16:40:50,113 INFO L175 Difference]: Start difference. First operand has 198 places, 192 transitions, 2090 flow. Second operand 33 states and 286 transitions. [2024-06-27 16:40:50,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 354 transitions, 4220 flow [2024-06-27 16:40:50,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 354 transitions, 3964 flow, removed 105 selfloop flow, removed 22 redundant places. [2024-06-27 16:40:50,191 INFO L231 Difference]: Finished difference. Result has 206 places, 223 transitions, 2663 flow [2024-06-27 16:40:50,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2663, PETRI_PLACES=206, PETRI_TRANSITIONS=223} [2024-06-27 16:40:50,192 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2024-06-27 16:40:50,193 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 223 transitions, 2663 flow [2024-06-27 16:40:50,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.628571428571429) internal successors, (197), 35 states have internal predecessors, (197), 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) [2024-06-27 16:40:50,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:50,193 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:50,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:50,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:40:50,406 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:50,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1441738218, now seen corresponding path program 9 times [2024-06-27 16:40:50,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:50,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719323617] [2024-06-27 16:40:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:40:52,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:52,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719323617] [2024-06-27 16:40:52,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719323617] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:52,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202932521] [2024-06-27 16:40:52,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:40:52,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:52,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:52,590 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) [2024-06-27 16:40:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:40:52,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:40:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:52,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:40:52,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:53,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:53,543 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 124 treesize of output 108 [2024-06-27 16:40:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:53,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:54,226 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:40:54,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:40:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202932521] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:54,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 7] total 34 [2024-06-27 16:40:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501676479] [2024-06-27 16:40:54,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:54,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:40:54,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:54,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:40:54,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:40:54,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:40:54,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 223 transitions, 2663 flow. Second operand has 34 states, 34 states have (on average 5.647058823529412) internal successors, (192), 34 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:40:54,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:54,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:40:54,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:57,904 INFO L124 PetriNetUnfolderBase]: 2071/3706 cut-off events. [2024-06-27 16:40:57,904 INFO L125 PetriNetUnfolderBase]: For 29910/29910 co-relation queries the response was YES. [2024-06-27 16:40:57,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18884 conditions, 3706 events. 2071/3706 cut-off events. For 29910/29910 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22377 event pairs, 439 based on Foata normal form. 10/3716 useless extension candidates. Maximal degree in co-relation 18795. Up to 790 conditions per place. [2024-06-27 16:40:57,925 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 203 selfloop transitions, 115 changer transitions 6/325 dead transitions. [2024-06-27 16:40:57,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 325 transitions, 4097 flow [2024-06-27 16:40:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:40:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:40:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 244 transitions. [2024-06-27 16:40:57,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25630252100840334 [2024-06-27 16:40:57,929 INFO L175 Difference]: Start difference. First operand has 206 places, 223 transitions, 2663 flow. Second operand 28 states and 244 transitions. [2024-06-27 16:40:57,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 325 transitions, 4097 flow [2024-06-27 16:40:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 325 transitions, 3779 flow, removed 135 selfloop flow, removed 18 redundant places. [2024-06-27 16:40:58,014 INFO L231 Difference]: Finished difference. Result has 215 places, 225 transitions, 2675 flow [2024-06-27 16:40:58,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2675, PETRI_PLACES=215, PETRI_TRANSITIONS=225} [2024-06-27 16:40:58,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-27 16:40:58,015 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 225 transitions, 2675 flow [2024-06-27 16:40:58,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.647058823529412) internal successors, (192), 34 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:40:58,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:58,015 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:58,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:58,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 16:40:58,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:58,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1224934515, now seen corresponding path program 10 times [2024-06-27 16:40:58,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:58,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007471639] [2024-06-27 16:40:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:58,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:00,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:00,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007471639] [2024-06-27 16:41:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007471639] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:00,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213799833] [2024-06-27 16:41:00,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:41:00,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:00,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:00,476 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) [2024-06-27 16:41:00,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:41:00,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:41:00,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:00,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:41:00,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:01,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:01,721 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:41:01,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:41:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:01,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213799833] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:01,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:01,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 8] total 32 [2024-06-27 16:41:01,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287842357] [2024-06-27 16:41:01,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:01,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:41:01,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:41:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:41:01,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:01,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 225 transitions, 2675 flow. Second operand has 32 states, 32 states have (on average 5.46875) internal successors, (175), 32 states have internal predecessors, (175), 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) [2024-06-27 16:41:01,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:01,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:01,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:04,530 INFO L124 PetriNetUnfolderBase]: 2404/4282 cut-off events. [2024-06-27 16:41:04,531 INFO L125 PetriNetUnfolderBase]: For 29141/29141 co-relation queries the response was YES. [2024-06-27 16:41:04,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19475 conditions, 4282 events. 2404/4282 cut-off events. For 29141/29141 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 26727 event pairs, 277 based on Foata normal form. 32/4314 useless extension candidates. Maximal degree in co-relation 19390. Up to 812 conditions per place. [2024-06-27 16:41:04,558 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 242 selfloop transitions, 159 changer transitions 21/423 dead transitions. [2024-06-27 16:41:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 423 transitions, 4946 flow [2024-06-27 16:41:04,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-06-27 16:41:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-06-27 16:41:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 379 transitions. [2024-06-27 16:41:04,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27187948350071733 [2024-06-27 16:41:04,560 INFO L175 Difference]: Start difference. First operand has 215 places, 225 transitions, 2675 flow. Second operand 41 states and 379 transitions. [2024-06-27 16:41:04,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 423 transitions, 4946 flow [2024-06-27 16:41:04,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 423 transitions, 4708 flow, removed 3 selfloop flow, removed 24 redundant places. [2024-06-27 16:41:04,639 INFO L231 Difference]: Finished difference. Result has 238 places, 254 transitions, 3268 flow [2024-06-27 16:41:04,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3268, PETRI_PLACES=238, PETRI_TRANSITIONS=254} [2024-06-27 16:41:04,640 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-27 16:41:04,640 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 254 transitions, 3268 flow [2024-06-27 16:41:04,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.46875) internal successors, (175), 32 states have internal predecessors, (175), 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) [2024-06-27 16:41:04,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:04,640 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:04,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:04,842 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:04,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1981888344, now seen corresponding path program 11 times [2024-06-27 16:41:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:04,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649551465] [2024-06-27 16:41:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:04,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:07,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:07,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649551465] [2024-06-27 16:41:07,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649551465] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:07,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184466890] [2024-06-27 16:41:07,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:41:07,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:07,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:07,214 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) [2024-06-27 16:41:07,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:41:07,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:41:07,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:07,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 16:41:07,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:07,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:07,987 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 92 treesize of output 88 [2024-06-27 16:41:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:08,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:08,534 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:41:08,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:41:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:08,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184466890] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:08,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:08,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 7] total 33 [2024-06-27 16:41:08,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777380300] [2024-06-27 16:41:08,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:08,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:41:08,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:41:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:41:08,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:08,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 254 transitions, 3268 flow. Second operand has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 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) [2024-06-27 16:41:08,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:08,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:08,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:10,524 INFO L124 PetriNetUnfolderBase]: 2414/4307 cut-off events. [2024-06-27 16:41:10,524 INFO L125 PetriNetUnfolderBase]: For 30618/30618 co-relation queries the response was YES. [2024-06-27 16:41:10,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20120 conditions, 4307 events. 2414/4307 cut-off events. For 30618/30618 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26934 event pairs, 784 based on Foata normal form. 5/4312 useless extension candidates. Maximal degree in co-relation 20028. Up to 1139 conditions per place. [2024-06-27 16:41:10,556 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 199 selfloop transitions, 90 changer transitions 16/306 dead transitions. [2024-06-27 16:41:10,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 306 transitions, 4285 flow [2024-06-27 16:41:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:41:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:41:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 161 transitions. [2024-06-27 16:41:10,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22549019607843138 [2024-06-27 16:41:10,558 INFO L175 Difference]: Start difference. First operand has 238 places, 254 transitions, 3268 flow. Second operand 21 states and 161 transitions. [2024-06-27 16:41:10,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 306 transitions, 4285 flow [2024-06-27 16:41:10,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 306 transitions, 4020 flow, removed 37 selfloop flow, removed 26 redundant places. [2024-06-27 16:41:10,668 INFO L231 Difference]: Finished difference. Result has 233 places, 252 transitions, 3157 flow [2024-06-27 16:41:10,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3157, PETRI_PLACES=233, PETRI_TRANSITIONS=252} [2024-06-27 16:41:10,669 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-27 16:41:10,669 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 252 transitions, 3157 flow [2024-06-27 16:41:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 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) [2024-06-27 16:41:10,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:10,670 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:10,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-06-27 16:41:10,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:10,883 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:10,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash -892351039, now seen corresponding path program 12 times [2024-06-27 16:41:10,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:10,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634515649] [2024-06-27 16:41:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:10,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:13,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634515649] [2024-06-27 16:41:13,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634515649] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305347436] [2024-06-27 16:41:13,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:41:13,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:13,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:13,081 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:13,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:41:13,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:41:13,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:13,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:41:13,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:13,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:13,778 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 192 treesize of output 168 [2024-06-27 16:41:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:14,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:14,636 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:41:14,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:41:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305347436] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:14,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:14,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 7] total 33 [2024-06-27 16:41:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343970366] [2024-06-27 16:41:14,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:14,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:41:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:14,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:41:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:41:14,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:14,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 252 transitions, 3157 flow. Second operand has 33 states, 33 states have (on average 5.606060606060606) internal successors, (185), 33 states have internal predecessors, (185), 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) [2024-06-27 16:41:14,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:14,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:14,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:16,940 INFO L124 PetriNetUnfolderBase]: 2618/4663 cut-off events. [2024-06-27 16:41:16,940 INFO L125 PetriNetUnfolderBase]: For 33900/33900 co-relation queries the response was YES. [2024-06-27 16:41:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21703 conditions, 4663 events. 2618/4663 cut-off events. For 33900/33900 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 29584 event pairs, 479 based on Foata normal form. 11/4674 useless extension candidates. Maximal degree in co-relation 21610. Up to 1239 conditions per place. [2024-06-27 16:41:16,975 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 197 selfloop transitions, 148 changer transitions 8/354 dead transitions. [2024-06-27 16:41:16,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 354 transitions, 4711 flow [2024-06-27 16:41:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:41:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:41:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 211 transitions. [2024-06-27 16:41:16,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23868778280542988 [2024-06-27 16:41:16,977 INFO L175 Difference]: Start difference. First operand has 233 places, 252 transitions, 3157 flow. Second operand 26 states and 211 transitions. [2024-06-27 16:41:16,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 354 transitions, 4711 flow [2024-06-27 16:41:17,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 354 transitions, 4548 flow, removed 1 selfloop flow, removed 17 redundant places. [2024-06-27 16:41:17,096 INFO L231 Difference]: Finished difference. Result has 242 places, 269 transitions, 3656 flow [2024-06-27 16:41:17,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3656, PETRI_PLACES=242, PETRI_TRANSITIONS=269} [2024-06-27 16:41:17,097 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-27 16:41:17,097 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 269 transitions, 3656 flow [2024-06-27 16:41:17,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.606060606060606) internal successors, (185), 33 states have internal predecessors, (185), 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) [2024-06-27 16:41:17,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:17,098 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:17,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:17,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:17,310 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:17,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1064004586, now seen corresponding path program 13 times [2024-06-27 16:41:17,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:17,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826292794] [2024-06-27 16:41:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:19,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:19,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826292794] [2024-06-27 16:41:19,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826292794] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:19,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765431401] [2024-06-27 16:41:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:41:19,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:19,575 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:19,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:41:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:19,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:41:19,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:20,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:20,259 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 124 treesize of output 112 [2024-06-27 16:41:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:20,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:21,028 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:41:21,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:41:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765431401] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:21,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8, 8] total 32 [2024-06-27 16:41:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764976699] [2024-06-27 16:41:21,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:21,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:41:21,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:41:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:41:21,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:21,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 269 transitions, 3656 flow. Second operand has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 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) [2024-06-27 16:41:21,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:21,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:21,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:25,158 INFO L124 PetriNetUnfolderBase]: 2553/4542 cut-off events. [2024-06-27 16:41:25,158 INFO L125 PetriNetUnfolderBase]: For 33987/33987 co-relation queries the response was YES. [2024-06-27 16:41:25,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21905 conditions, 4542 events. 2553/4542 cut-off events. For 33987/33987 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28556 event pairs, 701 based on Foata normal form. 15/4557 useless extension candidates. Maximal degree in co-relation 21810. Up to 1367 conditions per place. [2024-06-27 16:41:25,189 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 223 selfloop transitions, 142 changer transitions 26/392 dead transitions. [2024-06-27 16:41:25,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 392 transitions, 5284 flow [2024-06-27 16:41:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 16:41:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 16:41:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 283 transitions. [2024-06-27 16:41:25,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23781512605042016 [2024-06-27 16:41:25,191 INFO L175 Difference]: Start difference. First operand has 242 places, 269 transitions, 3656 flow. Second operand 35 states and 283 transitions. [2024-06-27 16:41:25,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 392 transitions, 5284 flow [2024-06-27 16:41:25,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 392 transitions, 5154 flow, removed 15 selfloop flow, removed 18 redundant places. [2024-06-27 16:41:25,304 INFO L231 Difference]: Finished difference. Result has 272 places, 285 transitions, 4054 flow [2024-06-27 16:41:25,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4054, PETRI_PLACES=272, PETRI_TRANSITIONS=285} [2024-06-27 16:41:25,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2024-06-27 16:41:25,305 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 285 transitions, 4054 flow [2024-06-27 16:41:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 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) [2024-06-27 16:41:25,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:25,305 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:25,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-06-27 16:41:25,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:25,510 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:25,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1191072014, now seen corresponding path program 14 times [2024-06-27 16:41:25,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:25,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463019030] [2024-06-27 16:41:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:27,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463019030] [2024-06-27 16:41:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463019030] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277757008] [2024-06-27 16:41:27,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:41:27,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:27,822 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:27,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:41:28,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:41:28,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:28,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:41:28,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:28,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:28,837 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 92 treesize of output 84 [2024-06-27 16:41:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:28,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:29,517 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:41:29,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:41:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277757008] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:29,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:29,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9] total 36 [2024-06-27 16:41:29,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126677154] [2024-06-27 16:41:29,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:29,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:41:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:29,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:41:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:41:29,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:29,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 285 transitions, 4054 flow. Second operand has 36 states, 36 states have (on average 5.444444444444445) internal successors, (196), 36 states have internal predecessors, (196), 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) [2024-06-27 16:41:29,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:29,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:29,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:32,442 INFO L124 PetriNetUnfolderBase]: 2425/4294 cut-off events. [2024-06-27 16:41:32,443 INFO L125 PetriNetUnfolderBase]: For 60036/60036 co-relation queries the response was YES. [2024-06-27 16:41:32,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26398 conditions, 4294 events. 2425/4294 cut-off events. For 60036/60036 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26489 event pairs, 787 based on Foata normal form. 15/4309 useless extension candidates. Maximal degree in co-relation 26289. Up to 1367 conditions per place. [2024-06-27 16:41:32,478 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 205 selfloop transitions, 112 changer transitions 27/345 dead transitions. [2024-06-27 16:41:32,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 345 transitions, 5361 flow [2024-06-27 16:41:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:41:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:41:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 189 transitions. [2024-06-27 16:41:32,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23161764705882354 [2024-06-27 16:41:32,479 INFO L175 Difference]: Start difference. First operand has 272 places, 285 transitions, 4054 flow. Second operand 24 states and 189 transitions. [2024-06-27 16:41:32,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 345 transitions, 5361 flow [2024-06-27 16:41:32,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 345 transitions, 4899 flow, removed 105 selfloop flow, removed 28 redundant places. [2024-06-27 16:41:32,659 INFO L231 Difference]: Finished difference. Result has 261 places, 275 transitions, 3861 flow [2024-06-27 16:41:32,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3861, PETRI_PLACES=261, PETRI_TRANSITIONS=275} [2024-06-27 16:41:32,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-27 16:41:32,660 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 275 transitions, 3861 flow [2024-06-27 16:41:32,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.444444444444445) internal successors, (196), 36 states have internal predecessors, (196), 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) [2024-06-27 16:41:32,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:32,661 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:32,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:32,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:32,874 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:32,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 216986169, now seen corresponding path program 15 times [2024-06-27 16:41:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916223065] [2024-06-27 16:41:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:35,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:35,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916223065] [2024-06-27 16:41:35,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916223065] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:35,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001915721] [2024-06-27 16:41:35,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:41:35,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:35,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:35,121 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:35,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:41:35,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:41:35,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:35,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:41:35,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:36,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:36,071 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 254 treesize of output 218 [2024-06-27 16:41:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:36,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:37,157 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:41:37,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:41:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:37,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001915721] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:37,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:37,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 35 [2024-06-27 16:41:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486947453] [2024-06-27 16:41:37,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:37,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:41:37,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:41:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:41:37,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:37,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 275 transitions, 3861 flow. Second operand has 35 states, 35 states have (on average 5.285714285714286) internal successors, (185), 35 states have internal predecessors, (185), 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) [2024-06-27 16:41:37,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:37,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:37,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:40,383 INFO L124 PetriNetUnfolderBase]: 2356/4138 cut-off events. [2024-06-27 16:41:40,383 INFO L125 PetriNetUnfolderBase]: For 44819/44819 co-relation queries the response was YES. [2024-06-27 16:41:40,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24130 conditions, 4138 events. 2356/4138 cut-off events. For 44819/44819 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25195 event pairs, 328 based on Foata normal form. 4/4136 useless extension candidates. Maximal degree in co-relation 24025. Up to 785 conditions per place. [2024-06-27 16:41:40,413 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 204 selfloop transitions, 174 changer transitions 19/398 dead transitions. [2024-06-27 16:41:40,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 398 transitions, 5836 flow [2024-06-27 16:41:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 16:41:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 16:41:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 284 transitions. [2024-06-27 16:41:40,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23865546218487396 [2024-06-27 16:41:40,417 INFO L175 Difference]: Start difference. First operand has 261 places, 275 transitions, 3861 flow. Second operand 35 states and 284 transitions. [2024-06-27 16:41:40,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 398 transitions, 5836 flow [2024-06-27 16:41:40,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 398 transitions, 5515 flow, removed 81 selfloop flow, removed 23 redundant places. [2024-06-27 16:41:40,552 INFO L231 Difference]: Finished difference. Result has 263 places, 278 transitions, 4142 flow [2024-06-27 16:41:40,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4142, PETRI_PLACES=263, PETRI_TRANSITIONS=278} [2024-06-27 16:41:40,553 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-06-27 16:41:40,553 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 278 transitions, 4142 flow [2024-06-27 16:41:40,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.285714285714286) internal successors, (185), 35 states have internal predecessors, (185), 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) [2024-06-27 16:41:40,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:40,554 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:40,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-06-27 16:41:40,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:40,766 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:40,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1671872490, now seen corresponding path program 16 times [2024-06-27 16:41:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123585970] [2024-06-27 16:41:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:42,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123585970] [2024-06-27 16:41:42,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123585970] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009253495] [2024-06-27 16:41:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:41:42,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:42,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:42,979 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:43,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 16:41:43,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:41:43,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:43,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:41:43,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:43,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:44,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:44,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:41:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:44,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009253495] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:44,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:44,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 8] total 35 [2024-06-27 16:41:44,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851165172] [2024-06-27 16:41:44,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:44,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:41:44,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:44,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:41:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:41:44,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:44,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 278 transitions, 4142 flow. Second operand has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 35 states have internal predecessors, (193), 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) [2024-06-27 16:41:44,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:44,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:44,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:47,279 INFO L124 PetriNetUnfolderBase]: 2546/4465 cut-off events. [2024-06-27 16:41:47,279 INFO L125 PetriNetUnfolderBase]: For 45650/45650 co-relation queries the response was YES. [2024-06-27 16:41:47,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25282 conditions, 4465 events. 2546/4465 cut-off events. For 45650/45650 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 27465 event pairs, 617 based on Foata normal form. 28/4484 useless extension candidates. Maximal degree in co-relation 25181. Up to 1795 conditions per place. [2024-06-27 16:41:47,309 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 225 selfloop transitions, 163 changer transitions 9/398 dead transitions. [2024-06-27 16:41:47,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 398 transitions, 6049 flow [2024-06-27 16:41:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:41:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:41:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 242 transitions. [2024-06-27 16:41:47,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2636165577342048 [2024-06-27 16:41:47,311 INFO L175 Difference]: Start difference. First operand has 263 places, 278 transitions, 4142 flow. Second operand 27 states and 242 transitions. [2024-06-27 16:41:47,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 398 transitions, 6049 flow [2024-06-27 16:41:47,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 398 transitions, 5726 flow, removed 5 selfloop flow, removed 27 redundant places. [2024-06-27 16:41:47,443 INFO L231 Difference]: Finished difference. Result has 265 places, 303 transitions, 4822 flow [2024-06-27 16:41:47,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4822, PETRI_PLACES=265, PETRI_TRANSITIONS=303} [2024-06-27 16:41:47,444 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-27 16:41:47,444 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 303 transitions, 4822 flow [2024-06-27 16:41:47,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 35 states have internal predecessors, (193), 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) [2024-06-27 16:41:47,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:47,444 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:47,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:47,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 16:41:47,658 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:47,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash -370999656, now seen corresponding path program 17 times [2024-06-27 16:41:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002708925] [2024-06-27 16:41:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:47,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:49,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:49,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002708925] [2024-06-27 16:41:49,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002708925] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:49,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203724521] [2024-06-27 16:41:49,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:41:49,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:49,880 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:49,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 16:41:50,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:41:50,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:50,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 74 conjunts are in the unsatisfiable core [2024-06-27 16:41:50,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:50,343 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 15 treesize of output 1 [2024-06-27 16:41:50,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:41:50,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:41:50,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:41:50,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:41:50,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:50,860 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 170 treesize of output 142 [2024-06-27 16:41:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:51,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:51,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203724521] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:51,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:51,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 8] total 45 [2024-06-27 16:41:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641012863] [2024-06-27 16:41:51,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:51,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-06-27 16:41:51,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-06-27 16:41:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2024-06-27 16:41:51,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:41:51,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 303 transitions, 4822 flow. Second operand has 45 states, 45 states have (on average 5.088888888888889) internal successors, (229), 45 states have internal predecessors, (229), 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) [2024-06-27 16:41:51,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:51,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:41:51,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:56,136 INFO L124 PetriNetUnfolderBase]: 2879/5074 cut-off events. [2024-06-27 16:41:56,136 INFO L125 PetriNetUnfolderBase]: For 53674/53674 co-relation queries the response was YES. [2024-06-27 16:41:56,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28962 conditions, 5074 events. 2879/5074 cut-off events. For 53674/53674 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31952 event pairs, 1212 based on Foata normal form. 20/5088 useless extension candidates. Maximal degree in co-relation 28860. Up to 3032 conditions per place. [2024-06-27 16:41:56,176 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 314 selfloop transitions, 125 changer transitions 12/452 dead transitions. [2024-06-27 16:41:56,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 452 transitions, 6942 flow [2024-06-27 16:41:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 16:41:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 16:41:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 313 transitions. [2024-06-27 16:41:56,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.255718954248366 [2024-06-27 16:41:56,177 INFO L175 Difference]: Start difference. First operand has 265 places, 303 transitions, 4822 flow. Second operand 36 states and 313 transitions. [2024-06-27 16:41:56,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 452 transitions, 6942 flow [2024-06-27 16:41:56,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 452 transitions, 6764 flow, removed 63 selfloop flow, removed 12 redundant places. [2024-06-27 16:41:56,404 INFO L231 Difference]: Finished difference. Result has 295 places, 329 transitions, 5518 flow [2024-06-27 16:41:56,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5518, PETRI_PLACES=295, PETRI_TRANSITIONS=329} [2024-06-27 16:41:56,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-27 16:41:56,406 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 329 transitions, 5518 flow [2024-06-27 16:41:56,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.088888888888889) internal successors, (229), 45 states have internal predecessors, (229), 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) [2024-06-27 16:41:56,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:56,406 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:56,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:56,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 16:41:56,620 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:56,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1709239863, now seen corresponding path program 18 times [2024-06-27 16:41:56,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:56,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021537403] [2024-06-27 16:41:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:56,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:58,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021537403] [2024-06-27 16:41:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021537403] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218932718] [2024-06-27 16:41:58,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:41:58,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:58,856 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 16:41:59,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:41:59,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:59,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:41:59,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:59,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:59,645 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 157 treesize of output 137 [2024-06-27 16:41:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:59,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:00,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:00,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:42:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:00,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218932718] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:00,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:00,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 35 [2024-06-27 16:42:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978580637] [2024-06-27 16:42:00,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:42:00,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:42:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:42:00,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:42:00,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 329 transitions, 5518 flow. Second operand has 35 states, 35 states have (on average 5.628571428571429) internal successors, (197), 35 states have internal predecessors, (197), 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) [2024-06-27 16:42:00,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:00,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:42:00,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:03,519 INFO L124 PetriNetUnfolderBase]: 3064/5417 cut-off events. [2024-06-27 16:42:03,520 INFO L125 PetriNetUnfolderBase]: For 62114/62114 co-relation queries the response was YES. [2024-06-27 16:42:03,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31485 conditions, 5417 events. 3064/5417 cut-off events. For 62114/62114 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34742 event pairs, 898 based on Foata normal form. 11/5422 useless extension candidates. Maximal degree in co-relation 31373. Up to 2164 conditions per place. [2024-06-27 16:42:03,575 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 279 selfloop transitions, 178 changer transitions 13/471 dead transitions. [2024-06-27 16:42:03,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 471 transitions, 7699 flow [2024-06-27 16:42:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:42:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:42:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 262 transitions. [2024-06-27 16:42:03,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2657200811359026 [2024-06-27 16:42:03,576 INFO L175 Difference]: Start difference. First operand has 295 places, 329 transitions, 5518 flow. Second operand 29 states and 262 transitions. [2024-06-27 16:42:03,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 471 transitions, 7699 flow [2024-06-27 16:42:03,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 471 transitions, 7329 flow, removed 95 selfloop flow, removed 22 redundant places. [2024-06-27 16:42:03,935 INFO L231 Difference]: Finished difference. Result has 308 places, 344 transitions, 6123 flow [2024-06-27 16:42:03,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6123, PETRI_PLACES=308, PETRI_TRANSITIONS=344} [2024-06-27 16:42:03,937 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-27 16:42:03,937 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 344 transitions, 6123 flow [2024-06-27 16:42:03,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.628571428571429) internal successors, (197), 35 states have internal predecessors, (197), 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) [2024-06-27 16:42:03,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:03,937 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:03,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:04,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 16:42:04,150 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:04,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1542577462, now seen corresponding path program 19 times [2024-06-27 16:42:04,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:04,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508568328] [2024-06-27 16:42:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:04,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:42:06,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:06,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508568328] [2024-06-27 16:42:06,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508568328] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:06,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819274980] [2024-06-27 16:42:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:42:06,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:06,196 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:06,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 16:42:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:06,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:42:06,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:06,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:06,910 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 157 treesize of output 141 [2024-06-27 16:42:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:07,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:07,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:07,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:42:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:07,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819274980] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:07,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:07,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 8] total 31 [2024-06-27 16:42:07,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756202676] [2024-06-27 16:42:07,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:07,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:42:07,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:42:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:42:07,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:42:07,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 344 transitions, 6123 flow. Second operand has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 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) [2024-06-27 16:42:07,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:07,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:42:07,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:10,416 INFO L124 PetriNetUnfolderBase]: 3051/5398 cut-off events. [2024-06-27 16:42:10,416 INFO L125 PetriNetUnfolderBase]: For 64184/64184 co-relation queries the response was YES. [2024-06-27 16:42:10,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31957 conditions, 5398 events. 3051/5398 cut-off events. For 64184/64184 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34415 event pairs, 677 based on Foata normal form. 5/5397 useless extension candidates. Maximal degree in co-relation 31844. Up to 1337 conditions per place. [2024-06-27 16:42:10,470 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 234 selfloop transitions, 205 changer transitions 17/457 dead transitions. [2024-06-27 16:42:10,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 457 transitions, 7832 flow [2024-06-27 16:42:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:42:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:42:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 278 transitions. [2024-06-27 16:42:10,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2637571157495256 [2024-06-27 16:42:10,472 INFO L175 Difference]: Start difference. First operand has 308 places, 344 transitions, 6123 flow. Second operand 31 states and 278 transitions. [2024-06-27 16:42:10,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 457 transitions, 7832 flow [2024-06-27 16:42:10,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 457 transitions, 7396 flow, removed 78 selfloop flow, removed 21 redundant places. [2024-06-27 16:42:10,741 INFO L231 Difference]: Finished difference. Result has 317 places, 348 transitions, 6273 flow [2024-06-27 16:42:10,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5673, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6273, PETRI_PLACES=317, PETRI_TRANSITIONS=348} [2024-06-27 16:42:10,742 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-27 16:42:10,742 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 348 transitions, 6273 flow [2024-06-27 16:42:10,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 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) [2024-06-27 16:42:10,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:10,742 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:10,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:10,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:10,944 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:10,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1622665571, now seen corresponding path program 20 times [2024-06-27 16:42:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676631254] [2024-06-27 16:42:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:10,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676631254] [2024-06-27 16:42:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676631254] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912507782] [2024-06-27 16:42:13,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:42:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:13,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:13,177 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:13,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:42:13,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:42:13,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:13,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:42:13,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:13,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:13,898 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 157 treesize of output 137 [2024-06-27 16:42:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:14,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:14,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:14,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:42:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912507782] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:14,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:14,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 35 [2024-06-27 16:42:14,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328947803] [2024-06-27 16:42:14,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:42:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:42:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:42:14,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:42:14,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 348 transitions, 6273 flow. Second operand has 35 states, 35 states have (on average 5.4) internal successors, (189), 35 states have internal predecessors, (189), 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) [2024-06-27 16:42:14,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:14,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:42:14,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:17,506 INFO L124 PetriNetUnfolderBase]: 2982/5257 cut-off events. [2024-06-27 16:42:17,506 INFO L125 PetriNetUnfolderBase]: For 61951/61951 co-relation queries the response was YES. [2024-06-27 16:42:17,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31151 conditions, 5257 events. 2982/5257 cut-off events. For 61951/61951 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 33282 event pairs, 1027 based on Foata normal form. 8/5259 useless extension candidates. Maximal degree in co-relation 31038. Up to 2335 conditions per place. [2024-06-27 16:42:17,563 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 244 selfloop transitions, 183 changer transitions 17/445 dead transitions. [2024-06-27 16:42:17,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 7765 flow [2024-06-27 16:42:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:42:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:42:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 240 transitions. [2024-06-27 16:42:17,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23529411764705882 [2024-06-27 16:42:17,578 INFO L175 Difference]: Start difference. First operand has 317 places, 348 transitions, 6273 flow. Second operand 30 states and 240 transitions. [2024-06-27 16:42:17,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 7765 flow [2024-06-27 16:42:17,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 445 transitions, 7340 flow, removed 44 selfloop flow, removed 19 redundant places. [2024-06-27 16:42:17,829 INFO L231 Difference]: Finished difference. Result has 331 places, 359 transitions, 6363 flow [2024-06-27 16:42:17,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5758, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6363, PETRI_PLACES=331, PETRI_TRANSITIONS=359} [2024-06-27 16:42:17,834 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2024-06-27 16:42:17,834 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 359 transitions, 6363 flow [2024-06-27 16:42:17,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.4) internal successors, (189), 35 states have internal predecessors, (189), 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) [2024-06-27 16:42:17,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:17,835 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:17,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:18,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 16:42:18,047 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:18,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:18,048 INFO L85 PathProgramCache]: Analyzing trace with hash 769644971, now seen corresponding path program 21 times [2024-06-27 16:42:18,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:18,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400775341] [2024-06-27 16:42:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:18,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:20,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:20,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400775341] [2024-06-27 16:42:20,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400775341] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:20,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213080524] [2024-06-27 16:42:20,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:42:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:20,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:20,208 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:20,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:42:20,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:42:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:20,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:42:20,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:21,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:21,100 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 124 treesize of output 108 [2024-06-27 16:42:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:21,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:21,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:21,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 194 [2024-06-27 16:42:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213080524] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:22,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 9] total 37 [2024-06-27 16:42:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962150614] [2024-06-27 16:42:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:22,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 16:42:22,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 16:42:22,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 16:42:22,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:42:22,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 359 transitions, 6363 flow. Second operand has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2024-06-27 16:42:22,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:22,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:42:22,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:25,193 INFO L124 PetriNetUnfolderBase]: 2989/5263 cut-off events. [2024-06-27 16:42:25,193 INFO L125 PetriNetUnfolderBase]: For 63207/63207 co-relation queries the response was YES. [2024-06-27 16:42:25,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32241 conditions, 5263 events. 2989/5263 cut-off events. For 63207/63207 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33472 event pairs, 1112 based on Foata normal form. 11/5268 useless extension candidates. Maximal degree in co-relation 32125. Up to 2988 conditions per place. [2024-06-27 16:42:25,244 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 248 selfloop transitions, 196 changer transitions 10/455 dead transitions. [2024-06-27 16:42:25,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 455 transitions, 7991 flow [2024-06-27 16:42:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:42:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:42:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 234 transitions. [2024-06-27 16:42:25,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24579831932773108 [2024-06-27 16:42:25,246 INFO L175 Difference]: Start difference. First operand has 331 places, 359 transitions, 6363 flow. Second operand 28 states and 234 transitions. [2024-06-27 16:42:25,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 455 transitions, 7991 flow [2024-06-27 16:42:25,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 455 transitions, 7747 flow, removed 44 selfloop flow, removed 23 redundant places. [2024-06-27 16:42:25,477 INFO L231 Difference]: Finished difference. Result has 340 places, 381 transitions, 6929 flow [2024-06-27 16:42:25,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6133, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6929, PETRI_PLACES=340, PETRI_TRANSITIONS=381} [2024-06-27 16:42:25,478 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 310 predicate places. [2024-06-27 16:42:25,479 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 381 transitions, 6929 flow [2024-06-27 16:42:25,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2024-06-27 16:42:25,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:25,479 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:25,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-06-27 16:42:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 16:42:25,681 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:25,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1116575975, now seen corresponding path program 22 times [2024-06-27 16:42:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:25,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807480306] [2024-06-27 16:42:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:28,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:28,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807480306] [2024-06-27 16:42:28,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807480306] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:28,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570389286] [2024-06-27 16:42:28,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:42:28,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:28,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:28,142 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:28,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 16:42:28,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:42:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:28,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 73 conjunts are in the unsatisfiable core [2024-06-27 16:42:28,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:28,612 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 15 treesize of output 1 [2024-06-27 16:42:28,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:42:28,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:42:28,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:42:28,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:42:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:42:29,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:34,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570389286] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:34,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:34,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 8] total 43 [2024-06-27 16:42:34,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51000765] [2024-06-27 16:42:34,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:34,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-06-27 16:42:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-06-27 16:42:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1670, Unknown=1, NotChecked=0, Total=1806 [2024-06-27 16:42:34,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:42:34,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 381 transitions, 6929 flow. Second operand has 43 states, 43 states have (on average 5.3023255813953485) internal successors, (228), 43 states have internal predecessors, (228), 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) [2024-06-27 16:42:34,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:34,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:42:34,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:41,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:42:45,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:42:50,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:42:54,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:06,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:11,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:15,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:19,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:23,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:35,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:39,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:43,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:47,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:52,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:56,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:43:56,467 INFO L124 PetriNetUnfolderBase]: 3031/5334 cut-off events. [2024-06-27 16:43:56,467 INFO L125 PetriNetUnfolderBase]: For 65802/65802 co-relation queries the response was YES. [2024-06-27 16:43:56,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34255 conditions, 5334 events. 3031/5334 cut-off events. For 65802/65802 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33884 event pairs, 1066 based on Foata normal form. 32/5360 useless extension candidates. Maximal degree in co-relation 34140. Up to 2300 conditions per place. [2024-06-27 16:43:56,513 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 268 selfloop transitions, 183 changer transitions 13/465 dead transitions. [2024-06-27 16:43:56,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 465 transitions, 8450 flow [2024-06-27 16:43:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 16:43:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 16:43:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 278 transitions. [2024-06-27 16:43:56,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23361344537815126 [2024-06-27 16:43:56,515 INFO L175 Difference]: Start difference. First operand has 340 places, 381 transitions, 6929 flow. Second operand 35 states and 278 transitions. [2024-06-27 16:43:56,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 465 transitions, 8450 flow [2024-06-27 16:43:56,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 465 transitions, 8224 flow, removed 24 selfloop flow, removed 20 redundant places. [2024-06-27 16:43:56,752 INFO L231 Difference]: Finished difference. Result has 353 places, 384 transitions, 7187 flow [2024-06-27 16:43:56,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6586, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7187, PETRI_PLACES=353, PETRI_TRANSITIONS=384} [2024-06-27 16:43:56,753 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2024-06-27 16:43:56,753 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 384 transitions, 7187 flow [2024-06-27 16:43:56,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.3023255813953485) internal successors, (228), 43 states have internal predecessors, (228), 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) [2024-06-27 16:43:56,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:56,754 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:56,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:56,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:56,967 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:56,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1212224815, now seen corresponding path program 23 times [2024-06-27 16:43:56,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:56,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948679108] [2024-06-27 16:43:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:56,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:59,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:59,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948679108] [2024-06-27 16:43:59,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948679108] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:59,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739214482] [2024-06-27 16:43:59,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:43:59,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:59,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:59,248 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:59,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 16:43:59,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:43:59,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:59,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:43:59,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:00,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:00,264 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 124 treesize of output 112 [2024-06-27 16:44:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:00,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:00,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:00,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 226 [2024-06-27 16:44:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:01,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739214482] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:01,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:01,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 7] total 33 [2024-06-27 16:44:01,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392765782] [2024-06-27 16:44:01,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:01,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:44:01,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:44:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:44:01,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:01,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 384 transitions, 7187 flow. Second operand has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 33 states have internal predecessors, (183), 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) [2024-06-27 16:44:01,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:01,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:01,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:04,324 INFO L124 PetriNetUnfolderBase]: 3006/5284 cut-off events. [2024-06-27 16:44:04,324 INFO L125 PetriNetUnfolderBase]: For 68676/68676 co-relation queries the response was YES. [2024-06-27 16:44:04,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34444 conditions, 5284 events. 3006/5284 cut-off events. For 68676/68676 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33469 event pairs, 995 based on Foata normal form. 4/5279 useless extension candidates. Maximal degree in co-relation 34326. Up to 2329 conditions per place. [2024-06-27 16:44:04,372 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 271 selfloop transitions, 174 changer transitions 10/456 dead transitions. [2024-06-27 16:44:04,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 456 transitions, 8560 flow [2024-06-27 16:44:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:44:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:44:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 228 transitions. [2024-06-27 16:44:04,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23949579831932774 [2024-06-27 16:44:04,392 INFO L175 Difference]: Start difference. First operand has 353 places, 384 transitions, 7187 flow. Second operand 28 states and 228 transitions. [2024-06-27 16:44:04,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 456 transitions, 8560 flow [2024-06-27 16:44:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 456 transitions, 8434 flow, removed 7 selfloop flow, removed 23 redundant places. [2024-06-27 16:44:04,641 INFO L231 Difference]: Finished difference. Result has 357 places, 379 transitions, 7342 flow [2024-06-27 16:44:04,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7342, PETRI_PLACES=357, PETRI_TRANSITIONS=379} [2024-06-27 16:44:04,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2024-06-27 16:44:04,645 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 379 transitions, 7342 flow [2024-06-27 16:44:04,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 33 states have internal predecessors, (183), 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) [2024-06-27 16:44:04,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:04,646 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:04,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:04,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:04,847 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:04,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1900130295, now seen corresponding path program 24 times [2024-06-27 16:44:04,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:04,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981395986] [2024-06-27 16:44:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:04,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:07,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:07,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981395986] [2024-06-27 16:44:07,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981395986] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:07,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505636829] [2024-06-27 16:44:07,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:44:07,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:07,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:07,118 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:07,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 16:44:07,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:44:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:07,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:44:07,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:08,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:08,185 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 92 treesize of output 84 [2024-06-27 16:44:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:08,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:08,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:08,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 194 [2024-06-27 16:44:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505636829] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:09,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:09,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 8] total 34 [2024-06-27 16:44:09,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538646793] [2024-06-27 16:44:09,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:44:09,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:09,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:44:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:44:09,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:09,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 379 transitions, 7342 flow. Second operand has 34 states, 34 states have (on average 5.5588235294117645) internal successors, (189), 34 states have internal predecessors, (189), 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) [2024-06-27 16:44:09,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:09,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:09,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:11,537 INFO L124 PetriNetUnfolderBase]: 2973/5218 cut-off events. [2024-06-27 16:44:11,537 INFO L125 PetriNetUnfolderBase]: For 73465/73465 co-relation queries the response was YES. [2024-06-27 16:44:11,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34683 conditions, 5218 events. 2973/5218 cut-off events. For 73465/73465 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32863 event pairs, 1221 based on Foata normal form. 4/5216 useless extension candidates. Maximal degree in co-relation 34565. Up to 2393 conditions per place. [2024-06-27 16:44:11,587 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 265 selfloop transitions, 130 changer transitions 10/406 dead transitions. [2024-06-27 16:44:11,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 406 transitions, 8285 flow [2024-06-27 16:44:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:44:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:44:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 138 transitions. [2024-06-27 16:44:11,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22549019607843138 [2024-06-27 16:44:11,588 INFO L175 Difference]: Start difference. First operand has 357 places, 379 transitions, 7342 flow. Second operand 18 states and 138 transitions. [2024-06-27 16:44:11,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 406 transitions, 8285 flow [2024-06-27 16:44:11,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 406 transitions, 8067 flow, removed 7 selfloop flow, removed 24 redundant places. [2024-06-27 16:44:11,832 INFO L231 Difference]: Finished difference. Result has 345 places, 374 transitions, 7296 flow [2024-06-27 16:44:11,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7066, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7296, PETRI_PLACES=345, PETRI_TRANSITIONS=374} [2024-06-27 16:44:11,833 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2024-06-27 16:44:11,833 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 374 transitions, 7296 flow [2024-06-27 16:44:11,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.5588235294117645) internal successors, (189), 34 states have internal predecessors, (189), 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) [2024-06-27 16:44:11,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:11,833 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:11,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:12,047 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:12,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1608047776, now seen corresponding path program 25 times [2024-06-27 16:44:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:12,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31889748] [2024-06-27 16:44:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:12,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:14,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:14,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31889748] [2024-06-27 16:44:14,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31889748] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:14,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764761676] [2024-06-27 16:44:14,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:44:14,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:14,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:14,163 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:14,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 16:44:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:14,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:44:14,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:14,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:15,502 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:44:15,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:44:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:15,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764761676] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:15,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:15,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 32 [2024-06-27 16:44:15,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967740529] [2024-06-27 16:44:15,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:15,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:44:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:15,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:44:15,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:44:15,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:15,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 374 transitions, 7296 flow. Second operand has 32 states, 32 states have (on average 5.34375) internal successors, (171), 32 states have internal predecessors, (171), 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) [2024-06-27 16:44:15,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:15,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:15,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:18,637 INFO L124 PetriNetUnfolderBase]: 3065/5363 cut-off events. [2024-06-27 16:44:18,637 INFO L125 PetriNetUnfolderBase]: For 77893/77893 co-relation queries the response was YES. [2024-06-27 16:44:18,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35534 conditions, 5363 events. 3065/5363 cut-off events. For 77893/77893 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34043 event pairs, 734 based on Foata normal form. 18/5375 useless extension candidates. Maximal degree in co-relation 35421. Up to 1556 conditions per place. [2024-06-27 16:44:18,687 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 270 selfloop transitions, 210 changer transitions 7/488 dead transitions. [2024-06-27 16:44:18,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 488 transitions, 9454 flow [2024-06-27 16:44:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:44:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:44:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 222 transitions. [2024-06-27 16:44:18,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.251131221719457 [2024-06-27 16:44:18,688 INFO L175 Difference]: Start difference. First operand has 345 places, 374 transitions, 7296 flow. Second operand 26 states and 222 transitions. [2024-06-27 16:44:18,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 488 transitions, 9454 flow [2024-06-27 16:44:18,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 488 transitions, 9205 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-06-27 16:44:18,941 INFO L231 Difference]: Finished difference. Result has 355 places, 389 transitions, 7844 flow [2024-06-27 16:44:18,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7844, PETRI_PLACES=355, PETRI_TRANSITIONS=389} [2024-06-27 16:44:18,942 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 325 predicate places. [2024-06-27 16:44:18,942 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 389 transitions, 7844 flow [2024-06-27 16:44:18,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.34375) internal successors, (171), 32 states have internal predecessors, (171), 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) [2024-06-27 16:44:18,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:18,943 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:18,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:19,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:19,148 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:19,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:19,149 INFO L85 PathProgramCache]: Analyzing trace with hash 939521051, now seen corresponding path program 26 times [2024-06-27 16:44:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534980802] [2024-06-27 16:44:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:21,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:21,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534980802] [2024-06-27 16:44:21,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534980802] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:21,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128925771] [2024-06-27 16:44:21,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:44:21,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:21,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:21,489 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:21,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 16:44:21,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:44:21,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:21,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:44:21,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:22,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:22,510 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 184 treesize of output 156 [2024-06-27 16:44:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:22,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:23,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:23,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:44:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:23,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128925771] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:23,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:23,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 8] total 36 [2024-06-27 16:44:23,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402819095] [2024-06-27 16:44:23,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:23,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:44:23,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:44:23,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:44:23,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:23,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 389 transitions, 7844 flow. Second operand has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 states have internal predecessors, (194), 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) [2024-06-27 16:44:23,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:23,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:23,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:27,286 INFO L124 PetriNetUnfolderBase]: 3520/6193 cut-off events. [2024-06-27 16:44:27,286 INFO L125 PetriNetUnfolderBase]: For 98357/98357 co-relation queries the response was YES. [2024-06-27 16:44:27,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41824 conditions, 6193 events. 3520/6193 cut-off events. For 98357/98357 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 40342 event pairs, 1342 based on Foata normal form. 33/6220 useless extension candidates. Maximal degree in co-relation 41707. Up to 3046 conditions per place. [2024-06-27 16:44:27,357 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 393 selfloop transitions, 165 changer transitions 9/568 dead transitions. [2024-06-27 16:44:27,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 568 transitions, 10909 flow [2024-06-27 16:44:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 16:44:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 16:44:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 323 transitions. [2024-06-27 16:44:27,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2714285714285714 [2024-06-27 16:44:27,358 INFO L175 Difference]: Start difference. First operand has 355 places, 389 transitions, 7844 flow. Second operand 35 states and 323 transitions. [2024-06-27 16:44:27,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 568 transitions, 10909 flow [2024-06-27 16:44:27,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 568 transitions, 10734 flow, removed 19 selfloop flow, removed 15 redundant places. [2024-06-27 16:44:27,807 INFO L231 Difference]: Finished difference. Result has 378 places, 417 transitions, 8675 flow [2024-06-27 16:44:27,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7682, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8675, PETRI_PLACES=378, PETRI_TRANSITIONS=417} [2024-06-27 16:44:27,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 348 predicate places. [2024-06-27 16:44:27,808 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 417 transitions, 8675 flow [2024-06-27 16:44:27,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 states have internal predecessors, (194), 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) [2024-06-27 16:44:27,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:27,809 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:27,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-06-27 16:44:28,023 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:28,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2035554000, now seen corresponding path program 27 times [2024-06-27 16:44:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238719203] [2024-06-27 16:44:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238719203] [2024-06-27 16:44:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238719203] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806800818] [2024-06-27 16:44:30,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:44:30,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:30,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:30,328 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:30,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 16:44:30,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:44:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:30,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:44:30,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:31,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:31,987 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:44:31,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:44:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:32,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806800818] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:32,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:32,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 35 [2024-06-27 16:44:32,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399348614] [2024-06-27 16:44:32,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:32,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:44:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:32,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:44:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:44:32,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:32,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 417 transitions, 8675 flow. Second operand has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 35 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) [2024-06-27 16:44:32,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:32,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:32,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:34,772 INFO L124 PetriNetUnfolderBase]: 3694/6491 cut-off events. [2024-06-27 16:44:34,773 INFO L125 PetriNetUnfolderBase]: For 105377/105377 co-relation queries the response was YES. [2024-06-27 16:44:34,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45095 conditions, 6491 events. 3694/6491 cut-off events. For 105377/105377 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 42960 event pairs, 1065 based on Foata normal form. 14/6499 useless extension candidates. Maximal degree in co-relation 44971. Up to 4649 conditions per place. [2024-06-27 16:44:34,834 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 349 selfloop transitions, 133 changer transitions 7/490 dead transitions. [2024-06-27 16:44:34,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 490 transitions, 10644 flow [2024-06-27 16:44:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:44:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:44:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 164 transitions. [2024-06-27 16:44:34,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2411764705882353 [2024-06-27 16:44:34,848 INFO L175 Difference]: Start difference. First operand has 378 places, 417 transitions, 8675 flow. Second operand 20 states and 164 transitions. [2024-06-27 16:44:34,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 490 transitions, 10644 flow [2024-06-27 16:44:35,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 490 transitions, 10303 flow, removed 96 selfloop flow, removed 21 redundant places. [2024-06-27 16:44:35,234 INFO L231 Difference]: Finished difference. Result has 377 places, 429 transitions, 8981 flow [2024-06-27 16:44:35,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8339, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8981, PETRI_PLACES=377, PETRI_TRANSITIONS=429} [2024-06-27 16:44:35,235 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 347 predicate places. [2024-06-27 16:44:35,235 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 429 transitions, 8981 flow [2024-06-27 16:44:35,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 35 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) [2024-06-27 16:44:35,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:35,236 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:35,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-06-27 16:44:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:35,441 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:35,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash 516716466, now seen corresponding path program 28 times [2024-06-27 16:44:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005868571] [2024-06-27 16:44:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:35,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:37,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:37,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005868571] [2024-06-27 16:44:37,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005868571] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:37,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776955036] [2024-06-27 16:44:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:44:37,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:37,793 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:37,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 16:44:38,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:44:38,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:38,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:44:38,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:38,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:38,830 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 124 treesize of output 112 [2024-06-27 16:44:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:39,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:39,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:39,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 194 [2024-06-27 16:44:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776955036] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:40,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:40,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 34 [2024-06-27 16:44:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574922395] [2024-06-27 16:44:40,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:44:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:44:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:44:40,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:40,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 429 transitions, 8981 flow. Second operand has 34 states, 34 states have (on average 5.588235294117647) internal successors, (190), 34 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) [2024-06-27 16:44:40,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:40,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:40,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:43,956 INFO L124 PetriNetUnfolderBase]: 3730/6554 cut-off events. [2024-06-27 16:44:43,957 INFO L125 PetriNetUnfolderBase]: For 104647/104647 co-relation queries the response was YES. [2024-06-27 16:44:44,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45372 conditions, 6554 events. 3730/6554 cut-off events. For 104647/104647 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43343 event pairs, 1485 based on Foata normal form. 20/6568 useless extension candidates. Maximal degree in co-relation 45252. Up to 3250 conditions per place. [2024-06-27 16:44:44,031 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 298 selfloop transitions, 205 changer transitions 10/514 dead transitions. [2024-06-27 16:44:44,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 514 transitions, 10631 flow [2024-06-27 16:44:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 16:44:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 16:44:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 258 transitions. [2024-06-27 16:44:44,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22994652406417113 [2024-06-27 16:44:44,039 INFO L175 Difference]: Start difference. First operand has 377 places, 429 transitions, 8981 flow. Second operand 33 states and 258 transitions. [2024-06-27 16:44:44,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 514 transitions, 10631 flow [2024-06-27 16:44:44,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 514 transitions, 10466 flow, removed 6 selfloop flow, removed 16 redundant places. [2024-06-27 16:44:44,438 INFO L231 Difference]: Finished difference. Result has 395 places, 434 transitions, 9371 flow [2024-06-27 16:44:44,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8762, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9371, PETRI_PLACES=395, PETRI_TRANSITIONS=434} [2024-06-27 16:44:44,439 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2024-06-27 16:44:44,439 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 434 transitions, 9371 flow [2024-06-27 16:44:44,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.588235294117647) internal successors, (190), 34 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) [2024-06-27 16:44:44,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:44,440 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:44,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-06-27 16:44:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:44,655 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1633769054, now seen corresponding path program 29 times [2024-06-27 16:44:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372604929] [2024-06-27 16:44:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:46,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372604929] [2024-06-27 16:44:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372604929] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118199842] [2024-06-27 16:44:46,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:44:46,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:46,880 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:46,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 16:44:47,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:44:47,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:47,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:44:47,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:47,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:47,837 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 132 treesize of output 124 [2024-06-27 16:44:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:48,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:48,744 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:44:48,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:44:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118199842] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:48,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 8] total 34 [2024-06-27 16:44:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962306976] [2024-06-27 16:44:48,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:48,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:44:48,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:44:48,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:44:48,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:48,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 434 transitions, 9371 flow. Second operand has 34 states, 34 states have (on average 5.411764705882353) internal successors, (184), 34 states have internal predecessors, (184), 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) [2024-06-27 16:44:48,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:48,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:48,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:52,563 INFO L124 PetriNetUnfolderBase]: 4081/7187 cut-off events. [2024-06-27 16:44:52,563 INFO L125 PetriNetUnfolderBase]: For 115032/115032 co-relation queries the response was YES. [2024-06-27 16:44:52,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49995 conditions, 7187 events. 4081/7187 cut-off events. For 115032/115032 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 48684 event pairs, 692 based on Foata normal form. 10/7188 useless extension candidates. Maximal degree in co-relation 49870. Up to 2895 conditions per place. [2024-06-27 16:44:52,646 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 348 selfloop transitions, 192 changer transitions 7/548 dead transitions. [2024-06-27 16:44:52,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 548 transitions, 11747 flow [2024-06-27 16:44:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:44:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:44:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 229 transitions. [2024-06-27 16:44:52,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24054621848739496 [2024-06-27 16:44:52,648 INFO L175 Difference]: Start difference. First operand has 395 places, 434 transitions, 9371 flow. Second operand 28 states and 229 transitions. [2024-06-27 16:44:52,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 548 transitions, 11747 flow [2024-06-27 16:44:53,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 548 transitions, 11545 flow, removed 7 selfloop flow, removed 26 redundant places. [2024-06-27 16:44:53,065 INFO L231 Difference]: Finished difference. Result has 400 places, 452 transitions, 10098 flow [2024-06-27 16:44:53,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=9176, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10098, PETRI_PLACES=400, PETRI_TRANSITIONS=452} [2024-06-27 16:44:53,065 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2024-06-27 16:44:53,066 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 452 transitions, 10098 flow [2024-06-27 16:44:53,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.411764705882353) internal successors, (184), 34 states have internal predecessors, (184), 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) [2024-06-27 16:44:53,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:53,066 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:53,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:53,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-27 16:44:53,277 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:53,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1323865792, now seen corresponding path program 30 times [2024-06-27 16:44:53,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:53,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216445798] [2024-06-27 16:44:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:55,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:55,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216445798] [2024-06-27 16:44:55,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216445798] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:55,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914925158] [2024-06-27 16:44:55,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:44:55,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:55,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:55,414 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:55,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 16:44:55,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:44:55,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:55,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 60 conjunts are in the unsatisfiable core [2024-06-27 16:44:55,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:55,924 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 15 treesize of output 1 [2024-06-27 16:44:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:44:55,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:44:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:44:56,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:44:56,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:44:56,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:44:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:44:56,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:44:56,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:56,642 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 170 treesize of output 142 [2024-06-27 16:44:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:56,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914925158] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:57,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 7] total 40 [2024-06-27 16:44:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6917340] [2024-06-27 16:44:57,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:57,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-06-27 16:44:57,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-06-27 16:44:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2024-06-27 16:44:57,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:44:57,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 452 transitions, 10098 flow. Second operand has 40 states, 40 states have (on average 5.35) internal successors, (214), 40 states have internal predecessors, (214), 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) [2024-06-27 16:44:57,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:57,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:44:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:02,506 INFO L124 PetriNetUnfolderBase]: 4118/7240 cut-off events. [2024-06-27 16:45:02,506 INFO L125 PetriNetUnfolderBase]: For 126099/126099 co-relation queries the response was YES. [2024-06-27 16:45:02,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51367 conditions, 7240 events. 4118/7240 cut-off events. For 126099/126099 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 49096 event pairs, 1560 based on Foata normal form. 10/7244 useless extension candidates. Maximal degree in co-relation 51238. Up to 3445 conditions per place. [2024-06-27 16:45:02,576 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 347 selfloop transitions, 209 changer transitions 7/564 dead transitions. [2024-06-27 16:45:02,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 564 transitions, 12227 flow [2024-06-27 16:45:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:45:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:45:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 256 transitions. [2024-06-27 16:45:02,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25098039215686274 [2024-06-27 16:45:02,578 INFO L175 Difference]: Start difference. First operand has 400 places, 452 transitions, 10098 flow. Second operand 30 states and 256 transitions. [2024-06-27 16:45:02,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 564 transitions, 12227 flow [2024-06-27 16:45:02,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 564 transitions, 11801 flow, removed 61 selfloop flow, removed 22 redundant places. [2024-06-27 16:45:02,987 INFO L231 Difference]: Finished difference. Result has 410 places, 462 transitions, 10541 flow [2024-06-27 16:45:02,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=9733, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10541, PETRI_PLACES=410, PETRI_TRANSITIONS=462} [2024-06-27 16:45:02,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2024-06-27 16:45:02,988 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 462 transitions, 10541 flow [2024-06-27 16:45:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.35) internal successors, (214), 40 states have internal predecessors, (214), 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) [2024-06-27 16:45:02,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:02,988 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:03,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-27 16:45:03,201 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:03,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1361678968, now seen corresponding path program 31 times [2024-06-27 16:45:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:03,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329902348] [2024-06-27 16:45:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:45:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329902348] [2024-06-27 16:45:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329902348] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97456450] [2024-06-27 16:45:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:45:04,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:04,917 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:04,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 16:45:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:05,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:45:05,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:05,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:05,638 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 157 treesize of output 141 [2024-06-27 16:45:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:05,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:06,487 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:45:06,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-06-27 16:45:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97456450] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:06,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:06,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 26 [2024-06-27 16:45:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356577481] [2024-06-27 16:45:06,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:06,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:45:06,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:06,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:45:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:45:06,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:45:06,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 462 transitions, 10541 flow. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 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) [2024-06-27 16:45:06,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:06,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:45:06,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:09,538 INFO L124 PetriNetUnfolderBase]: 4063/7129 cut-off events. [2024-06-27 16:45:09,538 INFO L125 PetriNetUnfolderBase]: For 126617/126617 co-relation queries the response was YES. [2024-06-27 16:45:09,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50490 conditions, 7129 events. 4063/7129 cut-off events. For 126617/126617 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48296 event pairs, 1033 based on Foata normal form. 5/7128 useless extension candidates. Maximal degree in co-relation 50360. Up to 3270 conditions per place. [2024-06-27 16:45:09,625 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 335 selfloop transitions, 175 changer transitions 11/522 dead transitions. [2024-06-27 16:45:09,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 522 transitions, 12016 flow [2024-06-27 16:45:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:45:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:45:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 169 transitions. [2024-06-27 16:45:09,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23669467787114845 [2024-06-27 16:45:09,626 INFO L175 Difference]: Start difference. First operand has 410 places, 462 transitions, 10541 flow. Second operand 21 states and 169 transitions. [2024-06-27 16:45:09,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 522 transitions, 12016 flow [2024-06-27 16:45:10,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 522 transitions, 11715 flow, removed 45 selfloop flow, removed 22 redundant places. [2024-06-27 16:45:10,311 INFO L231 Difference]: Finished difference. Result has 407 places, 461 transitions, 10556 flow [2024-06-27 16:45:10,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10213, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10556, PETRI_PLACES=407, PETRI_TRANSITIONS=461} [2024-06-27 16:45:10,312 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2024-06-27 16:45:10,312 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 461 transitions, 10556 flow [2024-06-27 16:45:10,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 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) [2024-06-27 16:45:10,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:10,313 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:10,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:10,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 16:45:10,532 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:10,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1410684280, now seen corresponding path program 32 times [2024-06-27 16:45:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:10,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447033713] [2024-06-27 16:45:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:10,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:12,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:12,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447033713] [2024-06-27 16:45:12,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447033713] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:12,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108386975] [2024-06-27 16:45:12,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:45:12,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:12,737 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:12,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 16:45:13,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:45:13,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:13,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:45:13,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:13,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:13,779 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 192 treesize of output 168 [2024-06-27 16:45:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:14,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:14,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:14,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:45:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:14,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108386975] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:14,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:14,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 35 [2024-06-27 16:45:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273726386] [2024-06-27 16:45:14,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:14,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:45:14,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:45:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:45:14,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:45:14,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 461 transitions, 10556 flow. Second operand has 35 states, 35 states have (on average 5.457142857142857) internal successors, (191), 35 states have internal predecessors, (191), 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) [2024-06-27 16:45:14,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:14,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:45:14,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:18,487 INFO L124 PetriNetUnfolderBase]: 3987/6982 cut-off events. [2024-06-27 16:45:18,487 INFO L125 PetriNetUnfolderBase]: For 128465/128465 co-relation queries the response was YES. [2024-06-27 16:45:18,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49836 conditions, 6982 events. 3987/6982 cut-off events. For 128465/128465 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 47041 event pairs, 2306 based on Foata normal form. 10/6986 useless extension candidates. Maximal degree in co-relation 49712. Up to 5174 conditions per place. [2024-06-27 16:45:18,548 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 377 selfloop transitions, 128 changer transitions 5/511 dead transitions. [2024-06-27 16:45:18,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 511 transitions, 11919 flow [2024-06-27 16:45:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:45:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:45:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 175 transitions. [2024-06-27 16:45:18,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2237851662404092 [2024-06-27 16:45:18,550 INFO L175 Difference]: Start difference. First operand has 407 places, 461 transitions, 10556 flow. Second operand 23 states and 175 transitions. [2024-06-27 16:45:18,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 511 transitions, 11919 flow [2024-06-27 16:45:18,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 511 transitions, 11772 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-27 16:45:18,923 INFO L231 Difference]: Finished difference. Result has 412 places, 457 transitions, 10557 flow [2024-06-27 16:45:18,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10337, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10557, PETRI_PLACES=412, PETRI_TRANSITIONS=457} [2024-06-27 16:45:18,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2024-06-27 16:45:18,925 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 457 transitions, 10557 flow [2024-06-27 16:45:18,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.457142857142857) internal successors, (191), 35 states have internal predecessors, (191), 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) [2024-06-27 16:45:18,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:18,926 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:18,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:19,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-27 16:45:19,140 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:19,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1354669379, now seen corresponding path program 33 times [2024-06-27 16:45:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:19,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287236237] [2024-06-27 16:45:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:21,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287236237] [2024-06-27 16:45:21,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287236237] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853221135] [2024-06-27 16:45:21,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:45:21,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:21,428 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:21,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 16:45:21,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:45:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:21,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:45:21,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:22,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:22,493 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 124 treesize of output 108 [2024-06-27 16:45:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:22,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:23,245 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:45:23,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:45:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853221135] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:23,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:23,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 7] total 34 [2024-06-27 16:45:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190687767] [2024-06-27 16:45:23,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:23,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:45:23,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:45:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:45:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:45:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 457 transitions, 10557 flow. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 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) [2024-06-27 16:45:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:45:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:27,691 INFO L124 PetriNetUnfolderBase]: 3939/6894 cut-off events. [2024-06-27 16:45:27,691 INFO L125 PetriNetUnfolderBase]: For 125690/125690 co-relation queries the response was YES. [2024-06-27 16:45:27,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49511 conditions, 6894 events. 3939/6894 cut-off events. For 125690/125690 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45974 event pairs, 1131 based on Foata normal form. 11/6899 useless extension candidates. Maximal degree in co-relation 49384. Up to 1822 conditions per place. [2024-06-27 16:45:27,753 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 333 selfloop transitions, 217 changer transitions 10/561 dead transitions. [2024-06-27 16:45:27,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 561 transitions, 12676 flow [2024-06-27 16:45:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:45:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:45:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 232 transitions. [2024-06-27 16:45:27,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25272331154684097 [2024-06-27 16:45:27,754 INFO L175 Difference]: Start difference. First operand has 412 places, 457 transitions, 10557 flow. Second operand 27 states and 232 transitions. [2024-06-27 16:45:27,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 561 transitions, 12676 flow [2024-06-27 16:45:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 561 transitions, 12397 flow, removed 6 selfloop flow, removed 24 redundant places. [2024-06-27 16:45:28,125 INFO L231 Difference]: Finished difference. Result has 413 places, 457 transitions, 10711 flow [2024-06-27 16:45:28,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10711, PETRI_PLACES=413, PETRI_TRANSITIONS=457} [2024-06-27 16:45:28,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 383 predicate places. [2024-06-27 16:45:28,126 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 457 transitions, 10711 flow [2024-06-27 16:45:28,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 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) [2024-06-27 16:45:28,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:28,126 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:28,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:28,339 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:28,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -309853114, now seen corresponding path program 34 times [2024-06-27 16:45:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140200783] [2024-06-27 16:45:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:30,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140200783] [2024-06-27 16:45:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140200783] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565883811] [2024-06-27 16:45:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:45:30,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:30,640 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:30,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 16:45:31,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:45:31,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:31,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:45:31,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:31,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:32,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:32,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:45:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:32,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565883811] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:32,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 34 [2024-06-27 16:45:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502423031] [2024-06-27 16:45:32,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:32,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:45:32,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:45:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:45:32,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:45:32,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 457 transitions, 10711 flow. Second operand has 34 states, 34 states have (on average 5.5588235294117645) internal successors, (189), 34 states have internal predecessors, (189), 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) [2024-06-27 16:45:32,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:32,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:45:32,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:35,773 INFO L124 PetriNetUnfolderBase]: 4002/6988 cut-off events. [2024-06-27 16:45:35,773 INFO L125 PetriNetUnfolderBase]: For 132235/132235 co-relation queries the response was YES. [2024-06-27 16:45:35,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50530 conditions, 6988 events. 4002/6988 cut-off events. For 132235/132235 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 46714 event pairs, 1613 based on Foata normal form. 28/7010 useless extension candidates. Maximal degree in co-relation 50407. Up to 3508 conditions per place. [2024-06-27 16:45:35,843 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 333 selfloop transitions, 198 changer transitions 11/543 dead transitions. [2024-06-27 16:45:35,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 543 transitions, 12326 flow [2024-06-27 16:45:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:45:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:45:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 244 transitions. [2024-06-27 16:45:35,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24746450304259635 [2024-06-27 16:45:35,844 INFO L175 Difference]: Start difference. First operand has 413 places, 457 transitions, 10711 flow. Second operand 29 states and 244 transitions. [2024-06-27 16:45:35,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 543 transitions, 12326 flow [2024-06-27 16:45:36,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 543 transitions, 11818 flow, removed 11 selfloop flow, removed 26 redundant places. [2024-06-27 16:45:36,239 INFO L231 Difference]: Finished difference. Result has 410 places, 460 transitions, 10688 flow [2024-06-27 16:45:36,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10066, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10688, PETRI_PLACES=410, PETRI_TRANSITIONS=460} [2024-06-27 16:45:36,240 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2024-06-27 16:45:36,240 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 460 transitions, 10688 flow [2024-06-27 16:45:36,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.5588235294117645) internal successors, (189), 34 states have internal predecessors, (189), 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) [2024-06-27 16:45:36,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:36,240 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:36,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-06-27 16:45:36,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-06-27 16:45:36,457 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:36,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1704790593, now seen corresponding path program 35 times [2024-06-27 16:45:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:36,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19600468] [2024-06-27 16:45:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:36,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:45:38,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:38,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19600468] [2024-06-27 16:45:38,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19600468] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:38,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213360587] [2024-06-27 16:45:38,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:45:38,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:38,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:38,529 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:38,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 16:45:39,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:45:39,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:39,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:45:39,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:39,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:39,698 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 159 treesize of output 143 [2024-06-27 16:45:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:39,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:40,413 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:45:40,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:45:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213360587] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:40,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:40,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 31 [2024-06-27 16:45:40,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584727265] [2024-06-27 16:45:40,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:40,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:45:40,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:45:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:45:40,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:45:40,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 460 transitions, 10688 flow. Second operand has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 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) [2024-06-27 16:45:40,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:40,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:45:40,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:44,252 INFO L124 PetriNetUnfolderBase]: 3586/6267 cut-off events. [2024-06-27 16:45:44,253 INFO L125 PetriNetUnfolderBase]: For 118604/118604 co-relation queries the response was YES. [2024-06-27 16:45:44,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46464 conditions, 6267 events. 3586/6267 cut-off events. For 118604/118604 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 41083 event pairs, 1422 based on Foata normal form. 8/6271 useless extension candidates. Maximal degree in co-relation 46346. Up to 2651 conditions per place. [2024-06-27 16:45:44,318 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 379 selfloop transitions, 173 changer transitions 12/565 dead transitions. [2024-06-27 16:45:44,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 565 transitions, 13060 flow [2024-06-27 16:45:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:45:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:45:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 202 transitions. [2024-06-27 16:45:44,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22850678733031674 [2024-06-27 16:45:44,320 INFO L175 Difference]: Start difference. First operand has 410 places, 460 transitions, 10688 flow. Second operand 26 states and 202 transitions. [2024-06-27 16:45:44,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 565 transitions, 13060 flow [2024-06-27 16:45:44,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 565 transitions, 12905 flow, removed 8 selfloop flow, removed 20 redundant places. [2024-06-27 16:45:44,675 INFO L231 Difference]: Finished difference. Result has 421 places, 462 transitions, 10954 flow [2024-06-27 16:45:44,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10473, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10954, PETRI_PLACES=421, PETRI_TRANSITIONS=462} [2024-06-27 16:45:44,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 391 predicate places. [2024-06-27 16:45:44,676 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 462 transitions, 10954 flow [2024-06-27 16:45:44,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 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) [2024-06-27 16:45:44,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:44,676 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:44,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:44,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-06-27 16:45:44,890 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1703532199, now seen corresponding path program 36 times [2024-06-27 16:45:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:44,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881636254] [2024-06-27 16:45:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881636254] [2024-06-27 16:45:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881636254] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952906101] [2024-06-27 16:45:47,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:45:47,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:47,151 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:47,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 16:45:47,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:45:47,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:47,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:45:47,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:48,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:49,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:49,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:45:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952906101] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:49,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 7] total 35 [2024-06-27 16:45:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405706852] [2024-06-27 16:45:49,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:49,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:45:49,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:45:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:45:49,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:45:49,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 462 transitions, 10954 flow. Second operand has 35 states, 35 states have (on average 5.457142857142857) internal successors, (191), 35 states have internal predecessors, (191), 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) [2024-06-27 16:45:49,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:49,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:45:49,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:52,337 INFO L124 PetriNetUnfolderBase]: 3198/5561 cut-off events. [2024-06-27 16:45:52,337 INFO L125 PetriNetUnfolderBase]: For 128684/128684 co-relation queries the response was YES. [2024-06-27 16:45:52,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45489 conditions, 5561 events. 3198/5561 cut-off events. For 128684/128684 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35348 event pairs, 1369 based on Foata normal form. 35/5592 useless extension candidates. Maximal degree in co-relation 45365. Up to 3178 conditions per place. [2024-06-27 16:45:52,385 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 331 selfloop transitions, 165 changer transitions 1/498 dead transitions. [2024-06-27 16:45:52,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 498 transitions, 12078 flow [2024-06-27 16:45:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:45:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:45:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 189 transitions. [2024-06-27 16:45:52,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21380090497737556 [2024-06-27 16:45:52,387 INFO L175 Difference]: Start difference. First operand has 421 places, 462 transitions, 10954 flow. Second operand 26 states and 189 transitions. [2024-06-27 16:45:52,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 498 transitions, 12078 flow [2024-06-27 16:45:52,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 498 transitions, 11638 flow, removed 40 selfloop flow, removed 25 redundant places. [2024-06-27 16:45:52,785 INFO L231 Difference]: Finished difference. Result has 415 places, 448 transitions, 10548 flow [2024-06-27 16:45:52,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10218, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10548, PETRI_PLACES=415, PETRI_TRANSITIONS=448} [2024-06-27 16:45:52,785 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2024-06-27 16:45:52,785 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 448 transitions, 10548 flow [2024-06-27 16:45:52,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.457142857142857) internal successors, (191), 35 states have internal predecessors, (191), 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) [2024-06-27 16:45:52,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:52,786 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:52,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:52,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-06-27 16:45:53,000 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:53,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1064807901, now seen corresponding path program 37 times [2024-06-27 16:45:53,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:53,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118285674] [2024-06-27 16:45:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:53,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:55,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:55,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118285674] [2024-06-27 16:45:55,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118285674] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:55,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162779503] [2024-06-27 16:45:55,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:45:55,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:55,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:55,260 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:55,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-27 16:45:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:55,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:45:55,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:56,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:56,280 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 92 treesize of output 88 [2024-06-27 16:45:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:56,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:57,007 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:45:57,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:45:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162779503] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:57,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:57,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 8] total 31 [2024-06-27 16:45:57,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127715452] [2024-06-27 16:45:57,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:57,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:45:57,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:45:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:45:57,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:45:57,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 448 transitions, 10548 flow. Second operand has 31 states, 31 states have (on average 5.516129032258065) internal successors, (171), 31 states have internal predecessors, (171), 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) [2024-06-27 16:45:57,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:57,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:45:57,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:01,301 INFO L124 PetriNetUnfolderBase]: 3170/5521 cut-off events. [2024-06-27 16:46:01,301 INFO L125 PetriNetUnfolderBase]: For 118890/118890 co-relation queries the response was YES. [2024-06-27 16:46:01,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43927 conditions, 5521 events. 3170/5521 cut-off events. For 118890/118890 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 35020 event pairs, 647 based on Foata normal form. 16/5530 useless extension candidates. Maximal degree in co-relation 43806. Up to 1068 conditions per place. [2024-06-27 16:46:01,359 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 246 selfloop transitions, 253 changer transitions 19/519 dead transitions. [2024-06-27 16:46:01,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 519 transitions, 12038 flow [2024-06-27 16:46:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:46:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:46:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 234 transitions. [2024-06-27 16:46:01,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23732251521298176 [2024-06-27 16:46:01,360 INFO L175 Difference]: Start difference. First operand has 415 places, 448 transitions, 10548 flow. Second operand 29 states and 234 transitions. [2024-06-27 16:46:01,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 519 transitions, 12038 flow [2024-06-27 16:46:01,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 519 transitions, 11743 flow, removed 22 selfloop flow, removed 26 redundant places. [2024-06-27 16:46:01,711 INFO L231 Difference]: Finished difference. Result has 416 places, 435 transitions, 10526 flow [2024-06-27 16:46:01,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10526, PETRI_PLACES=416, PETRI_TRANSITIONS=435} [2024-06-27 16:46:01,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 386 predicate places. [2024-06-27 16:46:01,712 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 435 transitions, 10526 flow [2024-06-27 16:46:01,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.516129032258065) internal successors, (171), 31 states have internal predecessors, (171), 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) [2024-06-27 16:46:01,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:01,712 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:01,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-06-27 16:46:01,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:01,925 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:01,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1060986177, now seen corresponding path program 38 times [2024-06-27 16:46:01,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:01,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175354671] [2024-06-27 16:46:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:01,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:04,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175354671] [2024-06-27 16:46:04,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175354671] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786523285] [2024-06-27 16:46:04,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:46:04,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:04,327 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:04,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-27 16:46:04,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:46:04,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:04,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:46:04,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:05,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:05,397 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 157 treesize of output 137 [2024-06-27 16:46:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:05,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:06,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:06,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-06-27 16:46:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:06,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786523285] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:06,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:06,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 7] total 35 [2024-06-27 16:46:06,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145337818] [2024-06-27 16:46:06,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:06,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:46:06,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:46:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:46:06,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:46:06,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 435 transitions, 10526 flow. Second operand has 35 states, 35 states have (on average 5.4) internal successors, (189), 35 states have internal predecessors, (189), 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) [2024-06-27 16:46:06,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:06,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:46:06,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:09,190 INFO L124 PetriNetUnfolderBase]: 3076/5321 cut-off events. [2024-06-27 16:46:09,190 INFO L125 PetriNetUnfolderBase]: For 118681/118681 co-relation queries the response was YES. [2024-06-27 16:46:09,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42828 conditions, 5321 events. 3076/5321 cut-off events. For 118681/118681 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33309 event pairs, 1266 based on Foata normal form. 4/5321 useless extension candidates. Maximal degree in co-relation 42711. Up to 3078 conditions per place. [2024-06-27 16:46:09,250 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 322 selfloop transitions, 164 changer transitions 5/492 dead transitions. [2024-06-27 16:46:09,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 492 transitions, 11899 flow [2024-06-27 16:46:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:46:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:46:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 192 transitions. [2024-06-27 16:46:09,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22588235294117648 [2024-06-27 16:46:09,251 INFO L175 Difference]: Start difference. First operand has 416 places, 435 transitions, 10526 flow. Second operand 25 states and 192 transitions. [2024-06-27 16:46:09,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 492 transitions, 11899 flow [2024-06-27 16:46:09,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 492 transitions, 11562 flow, removed 20 selfloop flow, removed 24 redundant places. [2024-06-27 16:46:09,586 INFO L231 Difference]: Finished difference. Result has 406 places, 431 transitions, 10434 flow [2024-06-27 16:46:09,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10130, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10434, PETRI_PLACES=406, PETRI_TRANSITIONS=431} [2024-06-27 16:46:09,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 376 predicate places. [2024-06-27 16:46:09,587 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 431 transitions, 10434 flow [2024-06-27 16:46:09,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.4) internal successors, (189), 35 states have internal predecessors, (189), 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) [2024-06-27 16:46:09,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:09,587 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:09,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-06-27 16:46:09,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:09,800 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:09,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:09,801 INFO L85 PathProgramCache]: Analyzing trace with hash 938319685, now seen corresponding path program 39 times [2024-06-27 16:46:09,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:09,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906822700] [2024-06-27 16:46:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:09,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:12,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906822700] [2024-06-27 16:46:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906822700] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720584102] [2024-06-27 16:46:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:46:12,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:12,070 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:12,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-27 16:46:12,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:46:12,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:12,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:46:12,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:13,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:13,265 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 92 treesize of output 84 [2024-06-27 16:46:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:13,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:13,833 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:46:13,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-06-27 16:46:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:14,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720584102] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:14,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:14,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 7] total 34 [2024-06-27 16:46:14,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345914391] [2024-06-27 16:46:14,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 16:46:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 16:46:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 16:46:14,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:46:14,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 431 transitions, 10434 flow. Second operand has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 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) [2024-06-27 16:46:14,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:14,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:46:14,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:16,671 INFO L124 PetriNetUnfolderBase]: 3043/5255 cut-off events. [2024-06-27 16:46:16,672 INFO L125 PetriNetUnfolderBase]: For 115646/115646 co-relation queries the response was YES. [2024-06-27 16:46:16,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42216 conditions, 5255 events. 3043/5255 cut-off events. For 115646/115646 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32802 event pairs, 1006 based on Foata normal form. 4/5255 useless extension candidates. Maximal degree in co-relation 42100. Up to 1983 conditions per place. [2024-06-27 16:46:16,729 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 283 selfloop transitions, 175 changer transitions 14/473 dead transitions. [2024-06-27 16:46:16,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 473 transitions, 11651 flow [2024-06-27 16:46:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:46:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:46:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 152 transitions. [2024-06-27 16:46:16,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21288515406162464 [2024-06-27 16:46:16,730 INFO L175 Difference]: Start difference. First operand has 406 places, 431 transitions, 10434 flow. Second operand 21 states and 152 transitions. [2024-06-27 16:46:16,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 473 transitions, 11651 flow [2024-06-27 16:46:17,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 473 transitions, 11292 flow, removed 0 selfloop flow, removed 24 redundant places. [2024-06-27 16:46:17,053 INFO L231 Difference]: Finished difference. Result has 398 places, 425 transitions, 10258 flow [2024-06-27 16:46:17,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10022, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10258, PETRI_PLACES=398, PETRI_TRANSITIONS=425} [2024-06-27 16:46:17,069 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 368 predicate places. [2024-06-27 16:46:17,069 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 425 transitions, 10258 flow [2024-06-27 16:46:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 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) [2024-06-27 16:46:17,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:17,070 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:17,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-06-27 16:46:17,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-27 16:46:17,272 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:17,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2055783244, now seen corresponding path program 40 times [2024-06-27 16:46:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:17,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755498194] [2024-06-27 16:46:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:17,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:22,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:22,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755498194] [2024-06-27 16:46:22,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755498194] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:22,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250761929] [2024-06-27 16:46:22,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:46:22,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:22,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:22,064 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:22,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-06-27 16:46:22,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:46:22,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:22,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 86 conjunts are in the unsatisfiable core [2024-06-27 16:46:22,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:22,650 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 15 treesize of output 1 [2024-06-27 16:46:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:46:22,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:46:22,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:46:22,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:46:22,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:46:22,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:46:24,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:24,315 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 357 treesize of output 283 [2024-06-27 16:46:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:46:24,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:29,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250761929] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:29,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:29,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 10] total 47 [2024-06-27 16:46:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814612192] [2024-06-27 16:46:29,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-06-27 16:46:29,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-06-27 16:46:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2007, Unknown=0, NotChecked=0, Total=2162 [2024-06-27 16:46:29,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:46:29,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 425 transitions, 10258 flow. Second operand has 47 states, 47 states have (on average 5.297872340425532) internal successors, (249), 47 states have internal predecessors, (249), 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) [2024-06-27 16:46:29,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:29,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:46:29,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:48,395 INFO L124 PetriNetUnfolderBase]: 5222/9165 cut-off events. [2024-06-27 16:46:48,395 INFO L125 PetriNetUnfolderBase]: For 196226/196226 co-relation queries the response was YES. [2024-06-27 16:46:48,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70701 conditions, 9165 events. 5222/9165 cut-off events. For 196226/196226 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 64151 event pairs, 964 based on Foata normal form. 22/9183 useless extension candidates. Maximal degree in co-relation 70585. Up to 1807 conditions per place. [2024-06-27 16:46:48,478 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 467 selfloop transitions, 294 changer transitions 54/816 dead transitions. [2024-06-27 16:46:48,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 816 transitions, 18358 flow [2024-06-27 16:46:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-27 16:46:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-27 16:46:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 440 transitions. [2024-06-27 16:46:48,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2813299232736573 [2024-06-27 16:46:48,480 INFO L175 Difference]: Start difference. First operand has 398 places, 425 transitions, 10258 flow. Second operand 46 states and 440 transitions. [2024-06-27 16:46:48,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 816 transitions, 18358 flow [2024-06-27 16:46:49,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 816 transitions, 17586 flow, removed 1 selfloop flow, removed 20 redundant places. [2024-06-27 16:46:49,041 INFO L231 Difference]: Finished difference. Result has 433 places, 525 transitions, 13127 flow [2024-06-27 16:46:49,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=9781, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=13127, PETRI_PLACES=433, PETRI_TRANSITIONS=525} [2024-06-27 16:46:49,041 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 403 predicate places. [2024-06-27 16:46:49,042 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 525 transitions, 13127 flow [2024-06-27 16:46:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.297872340425532) internal successors, (249), 47 states have internal predecessors, (249), 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) [2024-06-27 16:46:49,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:49,042 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:49,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-06-27 16:46:49,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-06-27 16:46:49,399 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:49,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1202010286, now seen corresponding path program 41 times [2024-06-27 16:46:49,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:49,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141684322] [2024-06-27 16:46:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:49,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:54,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141684322] [2024-06-27 16:46:54,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141684322] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078373512] [2024-06-27 16:46:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:46:54,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:54,079 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:54,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-06-27 16:46:54,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:46:54,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:54,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 82 conjunts are in the unsatisfiable core [2024-06-27 16:46:54,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:54,765 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 19 treesize of output 1 [2024-06-27 16:46:54,812 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-06-27 16:46:54,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 17 [2024-06-27 16:46:54,860 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-06-27 16:46:54,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 17 [2024-06-27 16:46:54,905 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-06-27 16:46:54,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 17 [2024-06-27 16:46:56,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:56,211 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 347 treesize of output 273 [2024-06-27 16:46:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:46:56,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:47:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078373512] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:03,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:03,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 12] total 51 [2024-06-27 16:47:03,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369444069] [2024-06-27 16:47:03,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-06-27 16:47:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-06-27 16:47:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2358, Unknown=0, NotChecked=0, Total=2550 [2024-06-27 16:47:03,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:47:03,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 525 transitions, 13127 flow. Second operand has 51 states, 51 states have (on average 5.117647058823529) internal successors, (261), 51 states have internal predecessors, (261), 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) [2024-06-27 16:47:03,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:03,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:47:03,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:17,576 INFO L124 PetriNetUnfolderBase]: 5497/9634 cut-off events. [2024-06-27 16:47:17,576 INFO L125 PetriNetUnfolderBase]: For 215734/215734 co-relation queries the response was YES. [2024-06-27 16:47:17,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74919 conditions, 9634 events. 5497/9634 cut-off events. For 215734/215734 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 67945 event pairs, 2378 based on Foata normal form. 2/9628 useless extension candidates. Maximal degree in co-relation 74789. Up to 6119 conditions per place. [2024-06-27 16:47:17,686 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 442 selfloop transitions, 292 changer transitions 14/749 dead transitions. [2024-06-27 16:47:17,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 749 transitions, 17248 flow [2024-06-27 16:47:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-06-27 16:47:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-06-27 16:47:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 401 transitions. [2024-06-27 16:47:17,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26209150326797387 [2024-06-27 16:47:17,687 INFO L175 Difference]: Start difference. First operand has 433 places, 525 transitions, 13127 flow. Second operand 45 states and 401 transitions. [2024-06-27 16:47:17,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 749 transitions, 17248 flow [2024-06-27 16:47:18,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 749 transitions, 16860 flow, removed 88 selfloop flow, removed 22 redundant places. [2024-06-27 16:47:18,633 INFO L231 Difference]: Finished difference. Result has 457 places, 582 transitions, 14750 flow [2024-06-27 16:47:18,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=12790, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14750, PETRI_PLACES=457, PETRI_TRANSITIONS=582} [2024-06-27 16:47:18,633 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 427 predicate places. [2024-06-27 16:47:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 582 transitions, 14750 flow [2024-06-27 16:47:18,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.117647058823529) internal successors, (261), 51 states have internal predecessors, (261), 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) [2024-06-27 16:47:18,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:18,634 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:18,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-06-27 16:47:18,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-06-27 16:47:18,848 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:18,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1409202090, now seen corresponding path program 42 times [2024-06-27 16:47:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:18,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080381915] [2024-06-27 16:47:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:23,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080381915] [2024-06-27 16:47:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080381915] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940936864] [2024-06-27 16:47:23,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:47:23,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:23,451 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:23,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-06-27 16:47:24,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:47:24,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:24,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 62 conjunts are in the unsatisfiable core [2024-06-27 16:47:24,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:25,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:25,230 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 346 treesize of output 286 [2024-06-27 16:47:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:47:26,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:28,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:28,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 410 treesize of output 374 [2024-06-27 16:47:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:47:30,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940936864] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:30,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:30,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 11] total 45 [2024-06-27 16:47:30,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317710090] [2024-06-27 16:47:30,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:30,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-06-27 16:47:30,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-06-27 16:47:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1812, Unknown=0, NotChecked=0, Total=1980 [2024-06-27 16:47:30,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:47:30,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 582 transitions, 14750 flow. Second operand has 45 states, 45 states have (on average 5.311111111111111) internal successors, (239), 45 states have internal predecessors, (239), 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) [2024-06-27 16:47:30,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:30,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:47:30,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:36,996 INFO L124 PetriNetUnfolderBase]: 5612/9846 cut-off events. [2024-06-27 16:47:36,996 INFO L125 PetriNetUnfolderBase]: For 229784/229784 co-relation queries the response was YES. [2024-06-27 16:47:37,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77484 conditions, 9846 events. 5612/9846 cut-off events. For 229784/229784 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 69606 event pairs, 1851 based on Foata normal form. 3/9849 useless extension candidates. Maximal degree in co-relation 77353. Up to 3731 conditions per place. [2024-06-27 16:47:37,119 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 400 selfloop transitions, 271 changer transitions 12/684 dead transitions. [2024-06-27 16:47:37,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 684 transitions, 17106 flow [2024-06-27 16:47:37,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-06-27 16:47:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-06-27 16:47:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 306 transitions. [2024-06-27 16:47:37,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.225 [2024-06-27 16:47:37,122 INFO L175 Difference]: Start difference. First operand has 457 places, 582 transitions, 14750 flow. Second operand 40 states and 306 transitions. [2024-06-27 16:47:37,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 684 transitions, 17106 flow [2024-06-27 16:47:38,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 684 transitions, 16566 flow, removed 124 selfloop flow, removed 23 redundant places. [2024-06-27 16:47:38,199 INFO L231 Difference]: Finished difference. Result has 480 places, 598 transitions, 15170 flow [2024-06-27 16:47:38,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14222, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=15170, PETRI_PLACES=480, PETRI_TRANSITIONS=598} [2024-06-27 16:47:38,200 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 450 predicate places. [2024-06-27 16:47:38,200 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 598 transitions, 15170 flow [2024-06-27 16:47:38,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.311111111111111) internal successors, (239), 45 states have internal predecessors, (239), 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) [2024-06-27 16:47:38,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:38,201 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:38,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:38,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:38,413 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:38,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:38,413 INFO L85 PathProgramCache]: Analyzing trace with hash 207343316, now seen corresponding path program 43 times [2024-06-27 16:47:38,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:38,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876466391] [2024-06-27 16:47:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:38,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:43,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:43,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876466391] [2024-06-27 16:47:43,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876466391] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:43,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846697574] [2024-06-27 16:47:43,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:47:43,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:43,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:43,486 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:43,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-06-27 16:47:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:44,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 54 conjunts are in the unsatisfiable core [2024-06-27 16:47:44,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:45,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:45,423 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 418 treesize of output 316 [2024-06-27 16:47:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:47:46,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:49,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:49,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 454 treesize of output 414 [2024-06-27 16:47:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:47:51,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846697574] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:51,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:51,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 41 [2024-06-27 16:47:51,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220169756] [2024-06-27 16:47:51,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:51,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 16:47:51,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 16:47:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 16:47:51,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:47:51,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 598 transitions, 15170 flow. Second operand has 41 states, 41 states have (on average 5.317073170731708) internal successors, (218), 41 states have internal predecessors, (218), 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) [2024-06-27 16:47:51,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:51,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:47:51,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:05,039 INFO L124 PetriNetUnfolderBase]: 6507/11496 cut-off events. [2024-06-27 16:48:05,040 INFO L125 PetriNetUnfolderBase]: For 316936/316936 co-relation queries the response was YES. [2024-06-27 16:48:05,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93512 conditions, 11496 events. 6507/11496 cut-off events. For 316936/316936 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 82943 event pairs, 1768 based on Foata normal form. 40/11533 useless extension candidates. Maximal degree in co-relation 93373. Up to 3602 conditions per place. [2024-06-27 16:48:05,172 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 525 selfloop transitions, 351 changer transitions 77/954 dead transitions. [2024-06-27 16:48:05,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 954 transitions, 21950 flow [2024-06-27 16:48:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-06-27 16:48:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-06-27 16:48:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 611 transitions. [2024-06-27 16:48:05,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27228163992869875 [2024-06-27 16:48:05,174 INFO L175 Difference]: Start difference. First operand has 480 places, 598 transitions, 15170 flow. Second operand 66 states and 611 transitions. [2024-06-27 16:48:05,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 954 transitions, 21950 flow [2024-06-27 16:48:06,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 954 transitions, 21387 flow, removed 75 selfloop flow, removed 33 redundant places. [2024-06-27 16:48:06,254 INFO L231 Difference]: Finished difference. Result has 527 places, 673 transitions, 17533 flow [2024-06-27 16:48:06,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14546, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17533, PETRI_PLACES=527, PETRI_TRANSITIONS=673} [2024-06-27 16:48:06,255 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 497 predicate places. [2024-06-27 16:48:06,255 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 673 transitions, 17533 flow [2024-06-27 16:48:06,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.317073170731708) internal successors, (218), 41 states have internal predecessors, (218), 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) [2024-06-27 16:48:06,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:06,256 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:06,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:06,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:06,484 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:06,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1486209194, now seen corresponding path program 44 times [2024-06-27 16:48:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:06,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870892768] [2024-06-27 16:48:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:06,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:11,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:11,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870892768] [2024-06-27 16:48:11,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870892768] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:11,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224503873] [2024-06-27 16:48:11,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:48:11,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:11,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:11,313 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:11,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-06-27 16:48:11,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:48:11,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:11,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 62 conjunts are in the unsatisfiable core [2024-06-27 16:48:11,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:13,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:13,124 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 326 treesize of output 274 [2024-06-27 16:48:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:48:13,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:16,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:16,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 392 treesize of output 358 [2024-06-27 16:48:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:48:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224503873] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:17,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:17,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 11] total 46 [2024-06-27 16:48:17,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306493975] [2024-06-27 16:48:17,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-06-27 16:48:17,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-06-27 16:48:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1884, Unknown=0, NotChecked=0, Total=2070 [2024-06-27 16:48:17,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:48:17,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 673 transitions, 17533 flow. Second operand has 46 states, 46 states have (on average 5.260869565217392) internal successors, (242), 46 states have internal predecessors, (242), 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) [2024-06-27 16:48:17,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:17,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:48:17,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:25,549 INFO L124 PetriNetUnfolderBase]: 6414/11275 cut-off events. [2024-06-27 16:48:25,549 INFO L125 PetriNetUnfolderBase]: For 361747/361747 co-relation queries the response was YES. [2024-06-27 16:48:25,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97085 conditions, 11275 events. 6414/11275 cut-off events. For 361747/361747 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 80901 event pairs, 2159 based on Foata normal form. 4/11279 useless extension candidates. Maximal degree in co-relation 96932. Up to 4240 conditions per place. [2024-06-27 16:48:25,687 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 502 selfloop transitions, 298 changer transitions 10/811 dead transitions. [2024-06-27 16:48:25,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 811 transitions, 20894 flow [2024-06-27 16:48:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-27 16:48:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-27 16:48:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 326 transitions. [2024-06-27 16:48:25,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2591414944356121 [2024-06-27 16:48:25,689 INFO L175 Difference]: Start difference. First operand has 527 places, 673 transitions, 17533 flow. Second operand 37 states and 326 transitions. [2024-06-27 16:48:25,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 811 transitions, 20894 flow [2024-06-27 16:48:27,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 811 transitions, 20157 flow, removed 297 selfloop flow, removed 29 redundant places. [2024-06-27 16:48:27,120 INFO L231 Difference]: Finished difference. Result has 530 places, 689 transitions, 18026 flow [2024-06-27 16:48:27,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=16855, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18026, PETRI_PLACES=530, PETRI_TRANSITIONS=689} [2024-06-27 16:48:27,121 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 500 predicate places. [2024-06-27 16:48:27,121 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 689 transitions, 18026 flow [2024-06-27 16:48:27,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.260869565217392) internal successors, (242), 46 states have internal predecessors, (242), 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) [2024-06-27 16:48:27,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:27,122 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:27,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-06-27 16:48:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:27,341 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:27,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash -996992722, now seen corresponding path program 45 times [2024-06-27 16:48:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066423527] [2024-06-27 16:48:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:32,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066423527] [2024-06-27 16:48:32,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066423527] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294624133] [2024-06-27 16:48:32,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:48:32,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:32,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:32,438 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:32,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-06-27 16:48:33,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:48:33,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:33,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 65 conjunts are in the unsatisfiable core [2024-06-27 16:48:33,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:34,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:34,315 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 346 treesize of output 286 [2024-06-27 16:48:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:48:35,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:37,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:37,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 384 treesize of output 362 [2024-06-27 16:48:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:48:38,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294624133] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:38,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:38,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 11] total 46 [2024-06-27 16:48:38,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184661870] [2024-06-27 16:48:38,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-06-27 16:48:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-06-27 16:48:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2024-06-27 16:48:38,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:48:38,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 689 transitions, 18026 flow. Second operand has 46 states, 46 states have (on average 5.260869565217392) internal successors, (242), 46 states have internal predecessors, (242), 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) [2024-06-27 16:48:38,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:38,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:48:38,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:51,519 INFO L124 PetriNetUnfolderBase]: 6925/12210 cut-off events. [2024-06-27 16:48:51,520 INFO L125 PetriNetUnfolderBase]: For 373871/373871 co-relation queries the response was YES. [2024-06-27 16:48:51,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102066 conditions, 12210 events. 6925/12210 cut-off events. For 373871/373871 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 89013 event pairs, 2103 based on Foata normal form. 7/12217 useless extension candidates. Maximal degree in co-relation 101916. Up to 4708 conditions per place. [2024-06-27 16:48:51,693 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 560 selfloop transitions, 375 changer transitions 22/958 dead transitions. [2024-06-27 16:48:51,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 958 transitions, 23319 flow [2024-06-27 16:48:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-06-27 16:48:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-06-27 16:48:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 528 transitions. [2024-06-27 16:48:51,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2504743833017078 [2024-06-27 16:48:51,695 INFO L175 Difference]: Start difference. First operand has 530 places, 689 transitions, 18026 flow. Second operand 62 states and 528 transitions. [2024-06-27 16:48:51,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 958 transitions, 23319 flow [2024-06-27 16:48:53,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 958 transitions, 22926 flow, removed 83 selfloop flow, removed 30 redundant places. [2024-06-27 16:48:53,499 INFO L231 Difference]: Finished difference. Result has 575 places, 749 transitions, 20153 flow [2024-06-27 16:48:53,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=17695, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=20153, PETRI_PLACES=575, PETRI_TRANSITIONS=749} [2024-06-27 16:48:53,500 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 545 predicate places. [2024-06-27 16:48:53,500 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 749 transitions, 20153 flow [2024-06-27 16:48:53,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.260869565217392) internal successors, (242), 46 states have internal predecessors, (242), 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) [2024-06-27 16:48:53,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:53,500 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:53,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-06-27 16:48:53,715 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:53,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1206700308, now seen corresponding path program 46 times [2024-06-27 16:48:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854009012] [2024-06-27 16:48:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:58,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:58,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854009012] [2024-06-27 16:48:58,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854009012] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:58,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634090739] [2024-06-27 16:48:58,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:48:58,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:58,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:58,563 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:58,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-06-27 16:48:59,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:48:59,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:59,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 80 conjunts are in the unsatisfiable core [2024-06-27 16:48:59,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:59,324 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 15 treesize of output 1 [2024-06-27 16:48:59,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:48:59,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:48:59,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:48:59,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:48:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:48:59,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-06-27 16:49:00,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:49:00,706 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 373 treesize of output 283 [2024-06-27 16:49:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:49:01,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 1 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:49:14,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634090739] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:14,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:14,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 10] total 48 [2024-06-27 16:49:14,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343871184] [2024-06-27 16:49:14,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:14,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-06-27 16:49:14,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-06-27 16:49:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2080, Unknown=2, NotChecked=0, Total=2256 [2024-06-27 16:49:14,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:49:14,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 749 transitions, 20153 flow. Second operand has 48 states, 48 states have (on average 5.25) internal successors, (252), 48 states have internal predecessors, (252), 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) [2024-06-27 16:49:14,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:14,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:49:14,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:28,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:32,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:36,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:40,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:49:46,778 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-06-27 16:49:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:49:46,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-06-27 16:49:46,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-06-27 16:49:46,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-06-27 16:49:46,980 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:915) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:247) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:482) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfoldingHelper(PetriNetUnfolderBase.java:226) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfolding(PetriNetUnfolderBase.java:183) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.(PetriNetUnfolderBase.java:123) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:72) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:128) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 54 more [2024-06-27 16:49:46,985 INFO L158 Benchmark]: Toolchain (without parser) took 657994.11ms. Allocated memory was 121.6MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 87.7MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2024-06-27 16:49:46,985 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 121.6MB. Free memory was 80.7MB in the beginning and 80.6MB in the end (delta: 160.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 16:49:46,985 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.25ms. Allocated memory is still 121.6MB. Free memory was 87.1MB in the beginning and 73.0MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-06-27 16:49:46,985 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.26ms. Allocated memory is still 121.6MB. Free memory was 73.0MB in the beginning and 69.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 16:49:46,985 INFO L158 Benchmark]: Boogie Preprocessor took 76.17ms. Allocated memory is still 121.6MB. Free memory was 69.7MB in the beginning and 65.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 16:49:46,985 INFO L158 Benchmark]: RCFGBuilder took 1055.85ms. Allocated memory was 121.6MB in the beginning and 163.6MB in the end (delta: 41.9MB). Free memory was 65.5MB in the beginning and 85.4MB in the end (delta: -19.8MB). Peak memory consumption was 68.4MB. Max. memory is 16.1GB. [2024-06-27 16:49:46,985 INFO L158 Benchmark]: TraceAbstraction took 656580.76ms. Allocated memory was 163.6MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 84.3MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. [2024-06-27 16:49:46,986 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 121.6MB. Free memory was 80.7MB in the beginning and 80.6MB in the end (delta: 160.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 218.25ms. Allocated memory is still 121.6MB. Free memory was 87.1MB in the beginning and 73.0MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.26ms. Allocated memory is still 121.6MB. Free memory was 73.0MB in the beginning and 69.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.17ms. Allocated memory is still 121.6MB. Free memory was 69.7MB in the beginning and 65.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1055.85ms. Allocated memory was 121.6MB in the beginning and 163.6MB in the end (delta: 41.9MB). Free memory was 65.5MB in the beginning and 85.4MB in the end (delta: -19.8MB). Peak memory consumption was 68.4MB. Max. memory is 16.1GB. * TraceAbstraction took 656580.76ms. Allocated memory was 163.6MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 84.3MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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 ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:49:49,249 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:49:49,302 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-06-27 16:49:49,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:49:49,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:49:49,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:49:49,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:49:49,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:49:49,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:49:49,333 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:49:49,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:49:49,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:49:49,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:49:49,336 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:49:49,336 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:49:49,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:49:49,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:49:49,337 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:49:49,337 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:49:49,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:49:49,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:49:49,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:49:49,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:49:49,338 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-06-27 16:49:49,339 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-06-27 16:49:49,339 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:49:49,339 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-06-27 16:49:49,339 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:49:49,339 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:49:49,340 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:49:49,341 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:49:49,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:49:49,341 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:49:49,341 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:49:49,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:49:49,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:49:49,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:49:49,342 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:49:49,342 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-06-27 16:49:49,343 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-06-27 16:49:49,343 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:49:49,343 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:49:49,343 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:49:49,343 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:49:49,344 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:49:49,344 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-06-27 16:49:49,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-06-27 16:49:49,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:49:49,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:49:49,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:49:49,654 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:49:49,655 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:49:49,656 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-06-27 16:49:50,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:49:51,083 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:49:51,085 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-06-27 16:49:51,096 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4fff1e6/8de9d38f907841dc8515e6562010a616/FLAG6867b8176 [2024-06-27 16:49:51,108 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4fff1e6/8de9d38f907841dc8515e6562010a616 [2024-06-27 16:49:51,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:49:51,111 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:49:51,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:49:51,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:49:51,119 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:49:51,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eafee31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51, skipping insertion in model container [2024-06-27 16:49:51,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,148 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:49:51,345 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-06-27 16:49:51,362 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:49:51,372 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:49:51,402 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-06-27 16:49:51,404 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:49:51,418 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:49:51,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51 WrapperNode [2024-06-27 16:49:51,419 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:49:51,420 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:49:51,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:49:51,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:49:51,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,470 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 395 [2024-06-27 16:49:51,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:49:51,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:49:51,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:49:51,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:49:51,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,484 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,497 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:49:51,498 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,498 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,523 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:49:51,524 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:49:51,524 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:49:51,524 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:49:51,525 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (1/1) ... [2024-06-27 16:49:51,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:49:51,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:51,556 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) [2024-06-27 16:49:51,583 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 [2024-06-27 16:49:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:49:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:49:51,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:49:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:49:51,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:49:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-06-27 16:49:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-06-27 16:49:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-06-27 16:49:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-06-27 16:49:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:49:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:49:51,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:49:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-06-27 16:49:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-06-27 16:49:51,637 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:49:51,724 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:49:51,727 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:49:52,324 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:49:52,324 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:49:52,720 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:49:52,720 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:49:52,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:49:52 BoogieIcfgContainer [2024-06-27 16:49:52,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:49:52,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:49:52,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:49:52,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:49:52,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:49:51" (1/3) ... [2024-06-27 16:49:52,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73210d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:49:52, skipping insertion in model container [2024-06-27 16:49:52,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:51" (2/3) ... [2024-06-27 16:49:52,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73210d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:49:52, skipping insertion in model container [2024-06-27 16:49:52,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:49:52" (3/3) ... [2024-06-27 16:49:52,726 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-06-27 16:49:52,733 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:49:52,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:49:52,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:49:52,741 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:49:52,815 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:49:52,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-06-27 16:49:52,859 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-06-27 16:49:52,859 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:49:52,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-27 16:49:52,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-06-27 16:49:52,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-06-27 16:49:52,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:49:52,875 INFO L357 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, mHoare=true, 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;@6ba410b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:49:52,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:49:52,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:49:52,885 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-06-27 16:49:52,885 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:49:52,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:52,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:52,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:52,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1469783188, now seen corresponding path program 1 times [2024-06-27 16:49:52,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:49:52,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881614542] [2024-06-27 16:49:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:52,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:49:52,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:49:52,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:49:52,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-06-27 16:49:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:53,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:49:53,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:53,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:49:53,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-27 16:49:53,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881614542] [2024-06-27 16:49:53,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881614542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:53,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:53,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:49:53,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517137662] [2024-06-27 16:49:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:53,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:49:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-27 16:49:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:49:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:49:53,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:49:53,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-27 16:49:53,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:53,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:49:53,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:53,371 INFO L124 PetriNetUnfolderBase]: 202/329 cut-off events. [2024-06-27 16:49:53,372 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 16:49:53,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 329 events. 202/329 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1005 event pairs, 138 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 620. Up to 327 conditions per place. [2024-06-27 16:49:53,375 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2024-06-27 16:49:53,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 134 flow [2024-06-27 16:49:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:49:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:49:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-06-27 16:49:53,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-06-27 16:49:53,386 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 3 states and 43 transitions. [2024-06-27 16:49:53,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 134 flow [2024-06-27 16:49:53,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:53,391 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 84 flow [2024-06-27 16:49:53,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2024-06-27 16:49:53,394 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-06-27 16:49:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 84 flow [2024-06-27 16:49:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-27 16:49:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:53,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:53,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-06-27 16:49:53,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:49:53,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:53,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash -552366708, now seen corresponding path program 1 times [2024-06-27 16:49:53,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:49:53,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186165010] [2024-06-27 16:49:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:53,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:49:53,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:49:53,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:49:53,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-06-27 16:49:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:53,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:53,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:53,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:53,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-27 16:49:53,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186165010] [2024-06-27 16:49:53,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186165010] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:53,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:49:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-06-27 16:49:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545306659] [2024-06-27 16:49:53,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:53,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:49:53,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-27 16:49:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:49:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:49:53,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-06-27 16:49:53,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2024-06-27 16:49:53,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:53,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-06-27 16:49:53,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:54,004 INFO L124 PetriNetUnfolderBase]: 202/335 cut-off events. [2024-06-27 16:49:54,004 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 16:49:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 335 events. 202/335 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 996 event pairs, 138 based on Foata normal form. 3/275 useless extension candidates. Maximal degree in co-relation 666. Up to 327 conditions per place. [2024-06-27 16:49:54,006 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2024-06-27 16:49:54,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 180 flow [2024-06-27 16:49:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:49:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:49:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-06-27 16:49:54,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2024-06-27 16:49:54,008 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 6 states and 60 transitions. [2024-06-27 16:49:54,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 180 flow [2024-06-27 16:49:54,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:49:54,010 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 146 flow [2024-06-27 16:49:54,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-06-27 16:49:54,011 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-06-27 16:49:54,011 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2024-06-27 16:49:54,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2024-06-27 16:49:54,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:54,011 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:54,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:54,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:49:54,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:54,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660482, now seen corresponding path program 2 times [2024-06-27 16:49:54,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:49:54,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065563975] [2024-06-27 16:49:54,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:49:54,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:49:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:49:54,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:49:54,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process Killed by 15