./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.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/popl20-more-min-array-hom.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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:58:00,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:58:00,202 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:58:00,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:58:00,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:58:00,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:58:00,239 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:58:00,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:58:00,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:58:00,244 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:58:00,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:58:00,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:58:00,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:58:00,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:58:00,247 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:58:00,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:58:00,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:58:00,248 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:58:00,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:58:00,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:58:00,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:58:00,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:58:00,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:58:00,250 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:58:00,250 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:58:00,250 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:58:00,250 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:58:00,251 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:58:00,251 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:58:00,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:58:00,252 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:58:00,253 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:58:00,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:58:00,253 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:58:00,253 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:58:00,253 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:58:00,254 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:58:00,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:58:00,254 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:58:00,254 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:58:00,254 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:58:00,255 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:58:00,255 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:58:00,255 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2024-06-27 16:58:00,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:58:00,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:58:00,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:58:00,545 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:58:00,545 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:58:00,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2024-06-27 16:58:01,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:58:01,898 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:58:01,898 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2024-06-27 16:58:01,905 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32aca6b7/15ff4763107243ec9bf21777dfdf183d/FLAG90c7b2f82 [2024-06-27 16:58:01,917 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32aca6b7/15ff4763107243ec9bf21777dfdf183d [2024-06-27 16:58:01,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:58:01,920 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:58:01,922 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:58:01,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:58:01,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:58:01,927 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:58:01" (1/1) ... [2024-06-27 16:58:01,928 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7737f809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:01, skipping insertion in model container [2024-06-27 16:58:01,928 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:58:01" (1/1) ... [2024-06-27 16:58:01,947 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:58:02,171 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/popl20-more-min-array-hom.wvr.c[2625,2638] [2024-06-27 16:58:02,188 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:58:02,199 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:58:02,237 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/popl20-more-min-array-hom.wvr.c[2625,2638] [2024-06-27 16:58:02,241 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:58:02,257 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:58:02,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02 WrapperNode [2024-06-27 16:58:02,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:58:02,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:58:02,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:58:02,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:58:02,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,312 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 87 [2024-06-27 16:58:02,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:58:02,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:58:02,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:58:02,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:58:02,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,361 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,386 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 16:58:02,387 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,387 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,434 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,439 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:58:02,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:58:02,448 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:58:02,448 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:58:02,449 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (1/1) ... [2024-06-27 16:58:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:58:02,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:02,482 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 16:58:02,505 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 16:58:02,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:58:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:58:02,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:58:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:58:02,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:58:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:58:02,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:58:02,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:58:02,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:58:02,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:58:02,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:58:02,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:58:02,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:58:02,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:58:02,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:58:02,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:58:02,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:58:02,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:58:02,541 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 16:58:02,646 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:58:02,648 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:58:02,958 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:58:02,959 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:58:03,111 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:58:03,111 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:58:03,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:58:03 BoogieIcfgContainer [2024-06-27 16:58:03,112 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:58:03,114 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:58:03,114 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:58:03,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:58:03,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:58:01" (1/3) ... [2024-06-27 16:58:03,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3328f83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:58:03, skipping insertion in model container [2024-06-27 16:58:03,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:58:02" (2/3) ... [2024-06-27 16:58:03,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3328f83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:58:03, skipping insertion in model container [2024-06-27 16:58:03,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:58:03" (3/3) ... [2024-06-27 16:58:03,119 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-06-27 16:58:03,127 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:58:03,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:58:03,135 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:58:03,135 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:58:03,187 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:58:03,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2024-06-27 16:58:03,252 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-06-27 16:58:03,252 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:58:03,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-06-27 16:58:03,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2024-06-27 16:58:03,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2024-06-27 16:58:03,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:58:03,291 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;@1b36bbcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:58:03,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:58:03,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:58:03,316 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-06-27 16:58:03,316 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:58:03,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:03,317 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 16:58:03,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:03,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1958378008, now seen corresponding path program 1 times [2024-06-27 16:58:03,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:03,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109713893] [2024-06-27 16:58:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:03,811 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 16:58:03,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109713893] [2024-06-27 16:58:03,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109713893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:58:03,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:58:03,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:58:03,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305605856] [2024-06-27 16:58:03,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:58:03,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:58:03,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:58:03,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:58:03,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:58:03,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 16:58:03,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:03,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:58:03,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:04,074 INFO L124 PetriNetUnfolderBase]: 617/956 cut-off events. [2024-06-27 16:58:04,075 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-06-27 16:58:04,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 956 events. 617/956 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3841 event pairs, 126 based on Foata normal form. 1/952 useless extension candidates. Maximal degree in co-relation 1717. Up to 677 conditions per place. [2024-06-27 16:58:04,091 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-06-27 16:58:04,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2024-06-27 16:58:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:58:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:58:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-06-27 16:58:04,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-06-27 16:58:04,105 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2024-06-27 16:58:04,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2024-06-27 16:58:04,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:58:04,115 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2024-06-27 16:58:04,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-06-27 16:58:04,120 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-06-27 16:58:04,120 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2024-06-27 16:58:04,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 16:58:04,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:04,120 INFO L208 CegarLoopForPetriNet]: trace histogram [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 16:58:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:58:04,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:04,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2056652879, now seen corresponding path program 1 times [2024-06-27 16:58:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74236704] [2024-06-27 16:58:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:04,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:58:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:04,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74236704] [2024-06-27 16:58:04,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74236704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:58:04,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:58:04,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:58:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624039044] [2024-06-27 16:58:04,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:58:04,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:58:04,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:58:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:58:04,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:58:04,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:04,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:04,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:58:04,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:04,404 INFO L124 PetriNetUnfolderBase]: 617/965 cut-off events. [2024-06-27 16:58:04,404 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2024-06-27 16:58:04,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 965 events. 617/965 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4063 event pairs, 407 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 812. Up to 895 conditions per place. [2024-06-27 16:58:04,411 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-06-27 16:58:04,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 150 flow [2024-06-27 16:58:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:58:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:58:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-06-27 16:58:04,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 16:58:04,415 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 3 states and 48 transitions. [2024-06-27 16:58:04,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 150 flow [2024-06-27 16:58:04,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:58:04,420 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 98 flow [2024-06-27 16:58:04,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-06-27 16:58:04,422 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-06-27 16:58:04,422 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 98 flow [2024-06-27 16:58:04,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:04,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:04,423 INFO L208 CegarLoopForPetriNet]: trace histogram [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 16:58:04,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:58:04,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:04,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash -448016717, now seen corresponding path program 1 times [2024-06-27 16:58:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:04,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873816462] [2024-06-27 16:58:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:04,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:58:04,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:04,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873816462] [2024-06-27 16:58:04,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873816462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:58:04,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:58:04,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:58:04,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184168526] [2024-06-27 16:58:04,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:58:04,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:58:04,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:04,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:58:04,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:58:04,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:58:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 16:58:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:58:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:04,729 INFO L124 PetriNetUnfolderBase]: 790/1159 cut-off events. [2024-06-27 16:58:04,729 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2024-06-27 16:58:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2573 conditions, 1159 events. 790/1159 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4529 event pairs, 246 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 2560. Up to 576 conditions per place. [2024-06-27 16:58:04,735 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-06-27 16:58:04,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 224 flow [2024-06-27 16:58:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:58:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:58:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-06-27 16:58:04,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 16:58:04,740 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 98 flow. Second operand 4 states and 63 transitions. [2024-06-27 16:58:04,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 224 flow [2024-06-27 16:58:04,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 218 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 16:58:04,742 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 113 flow [2024-06-27 16:58:04,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-06-27 16:58:04,744 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-06-27 16:58:04,745 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 113 flow [2024-06-27 16:58:04,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 16:58:04,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:04,745 INFO L208 CegarLoopForPetriNet]: trace histogram [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 16:58:04,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:58:04,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:04,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:04,746 INFO L85 PathProgramCache]: Analyzing trace with hash -164649811, now seen corresponding path program 1 times [2024-06-27 16:58:04,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:04,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108319980] [2024-06-27 16:58:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:04,859 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 16:58:04,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:04,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108319980] [2024-06-27 16:58:04,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108319980] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:04,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403909521] [2024-06-27 16:58:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:04,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:04,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:04,872 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 16:58:04,895 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 16:58:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:04,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:58:04,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:05,018 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 16:58:05,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:58:05,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403909521] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:05,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:58:05,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 16:58:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123329376] [2024-06-27 16:58:05,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:58:05,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:58:05,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:58:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:58:05,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:58:05,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 16:58:05,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:05,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:58:05,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:05,215 INFO L124 PetriNetUnfolderBase]: 850/1295 cut-off events. [2024-06-27 16:58:05,215 INFO L125 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2024-06-27 16:58:05,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1295 events. 850/1295 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5466 event pairs, 256 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 3207. Up to 670 conditions per place. [2024-06-27 16:58:05,223 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-06-27 16:58:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 257 flow [2024-06-27 16:58:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:58:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:58:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-06-27 16:58:05,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 16:58:05,225 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 113 flow. Second operand 5 states and 72 transitions. [2024-06-27 16:58:05,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 257 flow [2024-06-27 16:58:05,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:58:05,230 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 132 flow [2024-06-27 16:58:05,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 16:58:05,232 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-06-27 16:58:05,232 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 132 flow [2024-06-27 16:58:05,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 16:58:05,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:05,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 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 16:58:05,252 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 16:58:05,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:05,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:05,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1682656032, now seen corresponding path program 1 times [2024-06-27 16:58:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:05,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538280432] [2024-06-27 16:58:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:05,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:06,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:06,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538280432] [2024-06-27 16:58:06,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538280432] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:06,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390410000] [2024-06-27 16:58:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:06,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:06,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:06,114 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 16:58:06,127 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 16:58:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:06,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-27 16:58:06,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:06,273 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 16:58:06,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-06-27 16:58:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:06,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:08,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-06-27 16:58:08,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:09,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-06-27 16:58:28,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2024-06-27 16:58:29,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:29,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-06-27 16:58:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:31,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390410000] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:31,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:31,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-06-27 16:58:31,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066185147] [2024-06-27 16:58:31,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:31,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:58:31,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:31,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:58:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:58:31,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:58:31,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 132 flow. Second operand has 25 states, 25 states have (on average 8.88) internal successors, (222), 25 states have internal predecessors, (222), 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 16:58:31,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:31,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:58:31,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:33,666 INFO L124 PetriNetUnfolderBase]: 1841/2767 cut-off events. [2024-06-27 16:58:33,666 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-06-27 16:58:33,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7675 conditions, 2767 events. 1841/2767 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12707 event pairs, 98 based on Foata normal form. 1/2767 useless extension candidates. Maximal degree in co-relation 5619. Up to 1375 conditions per place. [2024-06-27 16:58:33,689 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 137 selfloop transitions, 57 changer transitions 1/199 dead transitions. [2024-06-27 16:58:33,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 199 transitions, 1067 flow [2024-06-27 16:58:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:58:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:58:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 321 transitions. [2024-06-27 16:58:33,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-27 16:58:33,695 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 132 flow. Second operand 21 states and 321 transitions. [2024-06-27 16:58:33,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 199 transitions, 1067 flow [2024-06-27 16:58:33,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 199 transitions, 1050 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:58:33,704 INFO L231 Difference]: Finished difference. Result has 64 places, 91 transitions, 543 flow [2024-06-27 16:58:33,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=543, PETRI_PLACES=64, PETRI_TRANSITIONS=91} [2024-06-27 16:58:33,707 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2024-06-27 16:58:33,707 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 91 transitions, 543 flow [2024-06-27 16:58:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.88) internal successors, (222), 25 states have internal predecessors, (222), 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 16:58:33,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:33,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 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 16:58:33,727 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 16:58:33,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:33,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:33,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1004642878, now seen corresponding path program 2 times [2024-06-27 16:58:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:33,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255734768] [2024-06-27 16:58:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:33,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:34,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:34,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255734768] [2024-06-27 16:58:34,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255734768] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:34,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279035173] [2024-06-27 16:58:34,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:58:34,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:34,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:34,600 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 16:58:34,608 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 16:58:34,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:58:34,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:34,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:58:34,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:34,770 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 16:58:35,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 42 [2024-06-27 16:58:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:58:35,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:36,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-06-27 16:58:36,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:36,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-06-27 16:59:06,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2024-06-27 16:59:06,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:06,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-06-27 16:59:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:11,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279035173] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:11,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:11,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-06-27 16:59:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950950369] [2024-06-27 16:59:11,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:11,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:59:11,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:11,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:59:11,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:59:12,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:59:12,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 91 transitions, 543 flow. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:12,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:12,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:59:12,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:13,135 INFO L124 PetriNetUnfolderBase]: 1538/2443 cut-off events. [2024-06-27 16:59:13,135 INFO L125 PetriNetUnfolderBase]: For 3246/3251 co-relation queries the response was YES. [2024-06-27 16:59:13,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7987 conditions, 2443 events. 1538/2443 cut-off events. For 3246/3251 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12138 event pairs, 120 based on Foata normal form. 5/2444 useless extension candidates. Maximal degree in co-relation 7437. Up to 1629 conditions per place. [2024-06-27 16:59:13,155 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 125 selfloop transitions, 49 changer transitions 1/181 dead transitions. [2024-06-27 16:59:13,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 181 transitions, 1211 flow [2024-06-27 16:59:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:59:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:59:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 242 transitions. [2024-06-27 16:59:13,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-27 16:59:13,157 INFO L175 Difference]: Start difference. First operand has 64 places, 91 transitions, 543 flow. Second operand 15 states and 242 transitions. [2024-06-27 16:59:13,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 181 transitions, 1211 flow [2024-06-27 16:59:13,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 181 transitions, 1093 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-27 16:59:13,171 INFO L231 Difference]: Finished difference. Result has 76 places, 111 transitions, 679 flow [2024-06-27 16:59:13,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=679, PETRI_PLACES=76, PETRI_TRANSITIONS=111} [2024-06-27 16:59:13,174 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2024-06-27 16:59:13,174 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 111 transitions, 679 flow [2024-06-27 16:59:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:13,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:13,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 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 16:59:13,195 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 16:59:13,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:13,388 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:13,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:13,389 INFO L85 PathProgramCache]: Analyzing trace with hash -842456322, now seen corresponding path program 3 times [2024-06-27 16:59:13,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:13,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797480180] [2024-06-27 16:59:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:13,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:13,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:13,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797480180] [2024-06-27 16:59:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797480180] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819190925] [2024-06-27 16:59:13,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:59:13,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:13,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:13,969 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 16:59:13,971 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 16:59:14,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:59:14,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:14,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:59:14,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:14,097 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 16:59:14,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2024-06-27 16:59:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:14,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:15,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-06-27 16:59:15,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:15,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 119 [2024-06-27 16:59:16,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2024-06-27 16:59:16,163 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-06-27 16:59:16,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 215 treesize of output 1 [2024-06-27 16:59:16,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-06-27 16:59:16,184 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-06-27 16:59:16,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 296 treesize of output 1 [2024-06-27 16:59:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819190925] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:16,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:16,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2024-06-27 16:59:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817746285] [2024-06-27 16:59:16,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:16,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:59:16,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:59:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:59:16,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:59:16,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 111 transitions, 679 flow. Second operand has 23 states, 23 states have (on average 8.826086956521738) internal successors, (203), 23 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 16:59:16,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:16,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:59:16,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:18,129 INFO L124 PetriNetUnfolderBase]: 2837/4272 cut-off events. [2024-06-27 16:59:18,130 INFO L125 PetriNetUnfolderBase]: For 4909/4918 co-relation queries the response was YES. [2024-06-27 16:59:18,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13715 conditions, 4272 events. 2837/4272 cut-off events. For 4909/4918 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21714 event pairs, 166 based on Foata normal form. 10/4281 useless extension candidates. Maximal degree in co-relation 12378. Up to 2499 conditions per place. [2024-06-27 16:59:18,156 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 162 selfloop transitions, 89 changer transitions 2/257 dead transitions. [2024-06-27 16:59:18,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 257 transitions, 1757 flow [2024-06-27 16:59:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:59:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:59:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 292 transitions. [2024-06-27 16:59:18,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46570972886762363 [2024-06-27 16:59:18,158 INFO L175 Difference]: Start difference. First operand has 76 places, 111 transitions, 679 flow. Second operand 19 states and 292 transitions. [2024-06-27 16:59:18,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 257 transitions, 1757 flow [2024-06-27 16:59:18,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 257 transitions, 1720 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 16:59:18,174 INFO L231 Difference]: Finished difference. Result has 96 places, 156 transitions, 1222 flow [2024-06-27 16:59:18,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1222, PETRI_PLACES=96, PETRI_TRANSITIONS=156} [2024-06-27 16:59:18,175 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 61 predicate places. [2024-06-27 16:59:18,175 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 156 transitions, 1222 flow [2024-06-27 16:59:18,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.826086956521738) internal successors, (203), 23 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 16:59:18,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:18,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 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 16:59:18,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:18,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:18,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:18,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:18,377 INFO L85 PathProgramCache]: Analyzing trace with hash 397210896, now seen corresponding path program 4 times [2024-06-27 16:59:18,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:18,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888279656] [2024-06-27 16:59:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:18,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888279656] [2024-06-27 16:59:18,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888279656] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222050199] [2024-06-27 16:59:18,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:59:18,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:18,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:18,940 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 16:59:18,951 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 16:59:19,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:59:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:19,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 16:59:19,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:19,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-06-27 16:59:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:19,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:19,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:19,455 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 123 treesize of output 75 [2024-06-27 16:59:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:19,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222050199] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:19,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:19,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2024-06-27 16:59:19,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082125049] [2024-06-27 16:59:19,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:19,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:59:19,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:19,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:59:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:59:19,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:59:19,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 156 transitions, 1222 flow. Second operand has 26 states, 26 states have (on average 7.576923076923077) internal successors, (197), 26 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 16:59:19,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:19,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:59:19,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:21,358 INFO L124 PetriNetUnfolderBase]: 5208/7731 cut-off events. [2024-06-27 16:59:21,358 INFO L125 PetriNetUnfolderBase]: For 15391/15391 co-relation queries the response was YES. [2024-06-27 16:59:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28668 conditions, 7731 events. 5208/7731 cut-off events. For 15391/15391 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 42969 event pairs, 524 based on Foata normal form. 2/7314 useless extension candidates. Maximal degree in co-relation 26121. Up to 4783 conditions per place. [2024-06-27 16:59:21,406 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 252 selfloop transitions, 213 changer transitions 1/469 dead transitions. [2024-06-27 16:59:21,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 469 transitions, 4090 flow [2024-06-27 16:59:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:59:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:59:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 391 transitions. [2024-06-27 16:59:21,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38220918866080156 [2024-06-27 16:59:21,409 INFO L175 Difference]: Start difference. First operand has 96 places, 156 transitions, 1222 flow. Second operand 31 states and 391 transitions. [2024-06-27 16:59:21,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 469 transitions, 4090 flow [2024-06-27 16:59:21,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 469 transitions, 3993 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 16:59:21,465 INFO L231 Difference]: Finished difference. Result has 130 places, 329 transitions, 3267 flow [2024-06-27 16:59:21,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3267, PETRI_PLACES=130, PETRI_TRANSITIONS=329} [2024-06-27 16:59:21,466 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 95 predicate places. [2024-06-27 16:59:21,466 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 329 transitions, 3267 flow [2024-06-27 16:59:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.576923076923077) internal successors, (197), 26 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 16:59:21,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:21,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 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 16:59:21,482 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 16:59:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:21,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:21,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2126374216, now seen corresponding path program 5 times [2024-06-27 16:59:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:21,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428654544] [2024-06-27 16:59:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:22,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:22,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428654544] [2024-06-27 16:59:22,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428654544] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:22,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146605869] [2024-06-27 16:59:22,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:59:22,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:22,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:22,208 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 16:59:22,210 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 16:59:22,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:59:22,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:22,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-27 16:59:22,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:22,311 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 16:59:22,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-06-27 16:59:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:22,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:24,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-06-27 16:59:24,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:24,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 119 [2024-06-27 16:59:25,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-06-27 16:59:25,240 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-06-27 16:59:25,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 296 treesize of output 1 [2024-06-27 16:59:25,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2024-06-27 16:59:25,253 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-06-27 16:59:25,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 215 treesize of output 1 [2024-06-27 16:59:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146605869] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:25,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:25,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2024-06-27 16:59:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223526119] [2024-06-27 16:59:25,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:25,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:59:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:59:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:59:25,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:59:25,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 329 transitions, 3267 flow. Second operand has 28 states, 28 states have (on average 8.571428571428571) internal successors, (240), 28 states have internal predecessors, (240), 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 16:59:25,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:25,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:59:25,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:29,182 INFO L124 PetriNetUnfolderBase]: 4822/7269 cut-off events. [2024-06-27 16:59:29,182 INFO L125 PetriNetUnfolderBase]: For 27422/27744 co-relation queries the response was YES. [2024-06-27 16:59:29,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32200 conditions, 7269 events. 4822/7269 cut-off events. For 27422/27744 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 40860 event pairs, 302 based on Foata normal form. 281/7513 useless extension candidates. Maximal degree in co-relation 32005. Up to 2971 conditions per place. [2024-06-27 16:59:29,225 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 176 selfloop transitions, 289 changer transitions 2/476 dead transitions. [2024-06-27 16:59:29,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 476 transitions, 4981 flow [2024-06-27 16:59:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:59:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:59:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 348 transitions. [2024-06-27 16:59:29,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45849802371541504 [2024-06-27 16:59:29,229 INFO L175 Difference]: Start difference. First operand has 130 places, 329 transitions, 3267 flow. Second operand 23 states and 348 transitions. [2024-06-27 16:59:29,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 476 transitions, 4981 flow [2024-06-27 16:59:29,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 476 transitions, 4859 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 16:59:29,372 INFO L231 Difference]: Finished difference. Result has 147 places, 365 transitions, 4235 flow [2024-06-27 16:59:29,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4235, PETRI_PLACES=147, PETRI_TRANSITIONS=365} [2024-06-27 16:59:29,373 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 112 predicate places. [2024-06-27 16:59:29,374 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 365 transitions, 4235 flow [2024-06-27 16:59:29,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.571428571428571) internal successors, (240), 28 states have internal predecessors, (240), 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 16:59:29,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:29,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 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 16:59:29,391 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 16:59:29,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:29,590 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:29,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:29,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1903545960, now seen corresponding path program 6 times [2024-06-27 16:59:29,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:29,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450170375] [2024-06-27 16:59:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:29,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:29,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:29,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450170375] [2024-06-27 16:59:29,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450170375] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:29,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551011335] [2024-06-27 16:59:29,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:59:29,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:29,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:29,682 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 16:59:29,700 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 16:59:29,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:59:29,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:29,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:59:29,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:29,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:29,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551011335] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:29,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:29,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:59:29,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273710555] [2024-06-27 16:59:29,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:29,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:59:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:29,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:59:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:59:29,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:59:29,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 365 transitions, 4235 flow. Second operand has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 14 states have internal predecessors, (124), 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 16:59:29,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:29,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:59:29,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:30,876 INFO L124 PetriNetUnfolderBase]: 6398/9527 cut-off events. [2024-06-27 16:59:30,876 INFO L125 PetriNetUnfolderBase]: For 50493/50962 co-relation queries the response was YES. [2024-06-27 16:59:30,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45907 conditions, 9527 events. 6398/9527 cut-off events. For 50493/50962 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 56005 event pairs, 1170 based on Foata normal form. 423/9914 useless extension candidates. Maximal degree in co-relation 44925. Up to 3504 conditions per place. [2024-06-27 16:59:30,966 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 518 selfloop transitions, 43 changer transitions 0/571 dead transitions. [2024-06-27 16:59:30,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 571 transitions, 7354 flow [2024-06-27 16:59:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:59:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:59:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 16:59:30,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-27 16:59:30,968 INFO L175 Difference]: Start difference. First operand has 147 places, 365 transitions, 4235 flow. Second operand 10 states and 171 transitions. [2024-06-27 16:59:30,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 571 transitions, 7354 flow [2024-06-27 16:59:31,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 571 transitions, 6849 flow, removed 43 selfloop flow, removed 15 redundant places. [2024-06-27 16:59:31,201 INFO L231 Difference]: Finished difference. Result has 144 places, 372 transitions, 4052 flow [2024-06-27 16:59:31,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4052, PETRI_PLACES=144, PETRI_TRANSITIONS=372} [2024-06-27 16:59:31,202 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 109 predicate places. [2024-06-27 16:59:31,202 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 372 transitions, 4052 flow [2024-06-27 16:59:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 14 states have internal predecessors, (124), 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 16:59:31,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:31,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 16:59:31,217 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 16:59:31,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:31,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:31,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1968583439, now seen corresponding path program 7 times [2024-06-27 16:59:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:31,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584059816] [2024-06-27 16:59:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:31,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584059816] [2024-06-27 16:59:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584059816] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528077101] [2024-06-27 16:59:31,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:59:31,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:31,505 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 16:59:31,524 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 16:59:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:31,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:59:31,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:31,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:31,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528077101] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:31,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:59:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933796690] [2024-06-27 16:59:31,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:31,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:59:31,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:59:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:59:31,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:59:31,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 372 transitions, 4052 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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 16:59:31,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:31,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:59:31,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:32,497 INFO L124 PetriNetUnfolderBase]: 5290/8118 cut-off events. [2024-06-27 16:59:32,497 INFO L125 PetriNetUnfolderBase]: For 42590/42975 co-relation queries the response was YES. [2024-06-27 16:59:32,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38775 conditions, 8118 events. 5290/8118 cut-off events. For 42590/42975 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 48146 event pairs, 1655 based on Foata normal form. 634/8713 useless extension candidates. Maximal degree in co-relation 38009. Up to 2728 conditions per place. [2024-06-27 16:59:32,554 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 406 selfloop transitions, 38 changer transitions 0/454 dead transitions. [2024-06-27 16:59:32,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 454 transitions, 5612 flow [2024-06-27 16:59:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:59:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:59:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 16:59:32,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 16:59:32,556 INFO L175 Difference]: Start difference. First operand has 144 places, 372 transitions, 4052 flow. Second operand 7 states and 121 transitions. [2024-06-27 16:59:32,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 454 transitions, 5612 flow [2024-06-27 16:59:32,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 454 transitions, 5585 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 16:59:32,742 INFO L231 Difference]: Finished difference. Result has 148 places, 330 transitions, 3624 flow [2024-06-27 16:59:32,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3624, PETRI_PLACES=148, PETRI_TRANSITIONS=330} [2024-06-27 16:59:32,744 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 113 predicate places. [2024-06-27 16:59:32,744 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 330 transitions, 3624 flow [2024-06-27 16:59:32,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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 16:59:32,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:32,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 16:59:32,759 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 16:59:32,959 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,SelfDestructingSolverStorable10 [2024-06-27 16:59:32,959 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:32,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1952484937, now seen corresponding path program 8 times [2024-06-27 16:59:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:32,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418443045] [2024-06-27 16:59:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:33,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:33,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418443045] [2024-06-27 16:59:33,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418443045] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:33,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326628916] [2024-06-27 16:59:33,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:59:33,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:33,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:33,056 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 16:59:33,076 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 16:59:33,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:59:33,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:33,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:59:33,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:33,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:33,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326628916] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:33,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:33,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:59:33,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862057166] [2024-06-27 16:59:33,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:33,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:59:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:59:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:59:33,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:59:33,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 330 transitions, 3624 flow. Second operand has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 states have internal predecessors, (135), 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 16:59:33,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:33,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:59:33,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:34,268 INFO L124 PetriNetUnfolderBase]: 4413/6787 cut-off events. [2024-06-27 16:59:34,268 INFO L125 PetriNetUnfolderBase]: For 39375/39702 co-relation queries the response was YES. [2024-06-27 16:59:34,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32425 conditions, 6787 events. 4413/6787 cut-off events. For 39375/39702 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39842 event pairs, 1378 based on Foata normal form. 664/7407 useless extension candidates. Maximal degree in co-relation 31223. Up to 2294 conditions per place. [2024-06-27 16:59:34,314 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 358 selfloop transitions, 27 changer transitions 13/409 dead transitions. [2024-06-27 16:59:34,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 409 transitions, 5171 flow [2024-06-27 16:59:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:59:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:59:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 16:59:34,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-06-27 16:59:34,318 INFO L175 Difference]: Start difference. First operand has 148 places, 330 transitions, 3624 flow. Second operand 7 states and 117 transitions. [2024-06-27 16:59:34,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 409 transitions, 5171 flow [2024-06-27 16:59:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 409 transitions, 5086 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 16:59:34,474 INFO L231 Difference]: Finished difference. Result has 152 places, 279 transitions, 3090 flow [2024-06-27 16:59:34,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3090, PETRI_PLACES=152, PETRI_TRANSITIONS=279} [2024-06-27 16:59:34,475 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 117 predicate places. [2024-06-27 16:59:34,475 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 279 transitions, 3090 flow [2024-06-27 16:59:34,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 states have internal predecessors, (135), 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 16:59:34,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:34,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 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 16:59:34,488 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 16:59:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:34,676 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:34,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:34,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2115494324, now seen corresponding path program 1 times [2024-06-27 16:59:34,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:34,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166705990] [2024-06-27 16:59:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:34,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:34,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166705990] [2024-06-27 16:59:34,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166705990] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:34,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357634368] [2024-06-27 16:59:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:34,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:34,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:34,756 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 16:59:34,779 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 16:59:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:34,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:59:34,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:34,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357634368] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:34,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:34,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-06-27 16:59:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027348001] [2024-06-27 16:59:34,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:59:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:59:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:59:34,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:59:34,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 279 transitions, 3090 flow. Second operand has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 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 16:59:34,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:34,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:59:34,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:35,394 INFO L124 PetriNetUnfolderBase]: 2557/4139 cut-off events. [2024-06-27 16:59:35,394 INFO L125 PetriNetUnfolderBase]: For 22289/22364 co-relation queries the response was YES. [2024-06-27 16:59:35,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19181 conditions, 4139 events. 2557/4139 cut-off events. For 22289/22364 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23627 event pairs, 1333 based on Foata normal form. 250/4386 useless extension candidates. Maximal degree in co-relation 19072. Up to 2232 conditions per place. [2024-06-27 16:59:35,414 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 61 selfloop transitions, 3 changer transitions 142/212 dead transitions. [2024-06-27 16:59:35,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 212 transitions, 2688 flow [2024-06-27 16:59:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:59:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:59:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 16:59:35,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-27 16:59:35,417 INFO L175 Difference]: Start difference. First operand has 152 places, 279 transitions, 3090 flow. Second operand 6 states and 97 transitions. [2024-06-27 16:59:35,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 212 transitions, 2688 flow [2024-06-27 16:59:35,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 212 transitions, 2431 flow, removed 34 selfloop flow, removed 15 redundant places. [2024-06-27 16:59:35,483 INFO L231 Difference]: Finished difference. Result has 140 places, 70 transitions, 524 flow [2024-06-27 16:59:35,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=140, PETRI_TRANSITIONS=70} [2024-06-27 16:59:35,484 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 105 predicate places. [2024-06-27 16:59:35,484 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 70 transitions, 524 flow [2024-06-27 16:59:35,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 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 16:59:35,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:35,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 16:59:35,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:35,686 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,SelfDestructingSolverStorable12 [2024-06-27 16:59:35,686 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:35,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash -703385619, now seen corresponding path program 9 times [2024-06-27 16:59:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:35,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742043796] [2024-06-27 16:59:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742043796] [2024-06-27 16:59:35,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742043796] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108608895] [2024-06-27 16:59:35,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:59:35,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:35,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:35,801 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 16:59:35,818 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 16:59:35,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:59:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:35,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:59:35,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:35,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:36,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108608895] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:36,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:36,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 16:59:36,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280510258] [2024-06-27 16:59:36,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:36,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:59:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:59:36,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:59:36,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:59:36,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 70 transitions, 524 flow. Second operand has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 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 16:59:36,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:36,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:59:36,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:36,976 INFO L124 PetriNetUnfolderBase]: 3943/5686 cut-off events. [2024-06-27 16:59:36,976 INFO L125 PetriNetUnfolderBase]: For 21172/21186 co-relation queries the response was YES. [2024-06-27 16:59:36,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25858 conditions, 5686 events. 3943/5686 cut-off events. For 21172/21186 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 28633 event pairs, 454 based on Foata normal form. 32/5716 useless extension candidates. Maximal degree in co-relation 25820. Up to 2749 conditions per place. [2024-06-27 16:59:37,010 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 255 selfloop transitions, 46 changer transitions 0/305 dead transitions. [2024-06-27 16:59:37,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 305 transitions, 2934 flow [2024-06-27 16:59:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:59:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:59:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 239 transitions. [2024-06-27 16:59:37,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42602495543672014 [2024-06-27 16:59:37,011 INFO L175 Difference]: Start difference. First operand has 140 places, 70 transitions, 524 flow. Second operand 17 states and 239 transitions. [2024-06-27 16:59:37,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 305 transitions, 2934 flow [2024-06-27 16:59:37,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 305 transitions, 2550 flow, removed 121 selfloop flow, removed 21 redundant places. [2024-06-27 16:59:37,103 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 800 flow [2024-06-27 16:59:37,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=800, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-06-27 16:59:37,104 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 56 predicate places. [2024-06-27 16:59:37,104 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 800 flow [2024-06-27 16:59:37,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 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 16:59:37,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:37,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 16:59:37,118 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 16:59:37,313 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,SelfDestructingSolverStorable13 [2024-06-27 16:59:37,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:37,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash -353278935, now seen corresponding path program 10 times [2024-06-27 16:59:37,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:37,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275155207] [2024-06-27 16:59:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:37,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275155207] [2024-06-27 16:59:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275155207] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:37,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813419725] [2024-06-27 16:59:37,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:59:37,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:37,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:37,428 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 16:59:37,437 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 16:59:37,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:59:37,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:37,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:59:37,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:37,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813419725] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:37,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:37,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-06-27 16:59:37,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203248574] [2024-06-27 16:59:37,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:37,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:59:37,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:37,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:59:37,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:59:37,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:59:37,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 800 flow. Second operand has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 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 16:59:37,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:37,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:59:37,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:41,312 INFO L124 PetriNetUnfolderBase]: 13578/18927 cut-off events. [2024-06-27 16:59:41,312 INFO L125 PetriNetUnfolderBase]: For 47879/47879 co-relation queries the response was YES. [2024-06-27 16:59:41,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79949 conditions, 18927 events. 13578/18927 cut-off events. For 47879/47879 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 97087 event pairs, 173 based on Foata normal form. 24/18894 useless extension candidates. Maximal degree in co-relation 79922. Up to 8208 conditions per place. [2024-06-27 16:59:41,408 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 891 selfloop transitions, 407 changer transitions 0/1299 dead transitions. [2024-06-27 16:59:41,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 1299 transitions, 11178 flow [2024-06-27 16:59:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-06-27 16:59:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-06-27 16:59:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1320 transitions. [2024-06-27 16:59:41,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39603960396039606 [2024-06-27 16:59:41,413 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 800 flow. Second operand 101 states and 1320 transitions. [2024-06-27 16:59:41,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 1299 transitions, 11178 flow [2024-06-27 16:59:41,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 1299 transitions, 10878 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-27 16:59:41,579 INFO L231 Difference]: Finished difference. Result has 215 places, 490 transitions, 4753 flow [2024-06-27 16:59:41,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=4753, PETRI_PLACES=215, PETRI_TRANSITIONS=490} [2024-06-27 16:59:41,581 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 180 predicate places. [2024-06-27 16:59:41,581 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 490 transitions, 4753 flow [2024-06-27 16:59:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 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 16:59:41,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:41,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 16:59:41,596 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 16:59:41,796 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,SelfDestructingSolverStorable14 [2024-06-27 16:59:41,797 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:41,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:41,797 INFO L85 PathProgramCache]: Analyzing trace with hash 140567229, now seen corresponding path program 11 times [2024-06-27 16:59:41,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:41,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932189602] [2024-06-27 16:59:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:41,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:59:41,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:41,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932189602] [2024-06-27 16:59:41,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932189602] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:41,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348583264] [2024-06-27 16:59:41,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:59:41,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:41,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:41,904 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 16:59:41,932 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 16:59:41,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:59:41,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:41,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:59:41,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:42,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:42,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348583264] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:42,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:42,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-06-27 16:59:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378733285] [2024-06-27 16:59:42,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:42,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:59:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:59:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:59:42,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:59:42,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 490 transitions, 4753 flow. Second operand has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 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 16:59:42,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:42,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:59:42,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:46,412 INFO L124 PetriNetUnfolderBase]: 19442/27360 cut-off events. [2024-06-27 16:59:46,412 INFO L125 PetriNetUnfolderBase]: For 208325/208325 co-relation queries the response was YES. [2024-06-27 16:59:46,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140385 conditions, 27360 events. 19442/27360 cut-off events. For 208325/208325 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 153153 event pairs, 1378 based on Foata normal form. 46/27406 useless extension candidates. Maximal degree in co-relation 140330. Up to 12004 conditions per place. [2024-06-27 16:59:46,638 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 417 selfloop transitions, 493 changer transitions 0/911 dead transitions. [2024-06-27 16:59:46,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 911 transitions, 10305 flow [2024-06-27 16:59:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:59:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:59:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 310 transitions. [2024-06-27 16:59:46,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-06-27 16:59:46,640 INFO L175 Difference]: Start difference. First operand has 215 places, 490 transitions, 4753 flow. Second operand 25 states and 310 transitions. [2024-06-27 16:59:46,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 911 transitions, 10305 flow [2024-06-27 16:59:48,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 911 transitions, 9371 flow, removed 243 selfloop flow, removed 8 redundant places. [2024-06-27 16:59:48,483 INFO L231 Difference]: Finished difference. Result has 243 places, 693 transitions, 7719 flow [2024-06-27 16:59:48,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7719, PETRI_PLACES=243, PETRI_TRANSITIONS=693} [2024-06-27 16:59:48,483 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 208 predicate places. [2024-06-27 16:59:48,483 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 693 transitions, 7719 flow [2024-06-27 16:59:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 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 16:59:48,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:48,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 16:59:48,494 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 16:59:48,684 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,SelfDestructingSolverStorable15 [2024-06-27 16:59:48,684 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:48,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash 745913991, now seen corresponding path program 12 times [2024-06-27 16:59:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:48,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339801842] [2024-06-27 16:59:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:59:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339801842] [2024-06-27 16:59:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339801842] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891866326] [2024-06-27 16:59:48,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:59:48,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:48,816 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 16:59:48,835 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 16:59:48,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:59:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:48,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:59:48,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:48,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:49,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891866326] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:49,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:49,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-06-27 16:59:49,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538249935] [2024-06-27 16:59:49,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:49,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:59:49,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:49,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:59:49,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:59:49,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:59:49,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 693 transitions, 7719 flow. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 19 states have internal predecessors, (129), 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 16:59:49,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:49,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:59:49,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:58,385 INFO L124 PetriNetUnfolderBase]: 31406/43898 cut-off events. [2024-06-27 16:59:58,385 INFO L125 PetriNetUnfolderBase]: For 552912/552912 co-relation queries the response was YES. [2024-06-27 16:59:58,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258523 conditions, 43898 events. 31406/43898 cut-off events. For 552912/552912 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 255553 event pairs, 484 based on Foata normal form. 23/43921 useless extension candidates. Maximal degree in co-relation 258458. Up to 19374 conditions per place. [2024-06-27 16:59:58,926 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 996 selfloop transitions, 1208 changer transitions 0/2205 dead transitions. [2024-06-27 16:59:58,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 2205 transitions, 28201 flow [2024-06-27 16:59:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-06-27 16:59:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2024-06-27 16:59:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 1536 transitions. [2024-06-27 16:59:58,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012539184952978 [2024-06-27 16:59:58,930 INFO L175 Difference]: Start difference. First operand has 243 places, 693 transitions, 7719 flow. Second operand 116 states and 1536 transitions. [2024-06-27 16:59:58,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 2205 transitions, 28201 flow [2024-06-27 17:00:08,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 2205 transitions, 27203 flow, removed 303 selfloop flow, removed 5 redundant places. [2024-06-27 17:00:08,353 INFO L231 Difference]: Finished difference. Result has 374 places, 1375 transitions, 18293 flow [2024-06-27 17:00:08,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7395, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=18293, PETRI_PLACES=374, PETRI_TRANSITIONS=1375} [2024-06-27 17:00:08,354 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 339 predicate places. [2024-06-27 17:00:08,354 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1375 transitions, 18293 flow [2024-06-27 17:00:08,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 19 states have internal predecessors, (129), 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 17:00:08,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:08,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 17:00:08,368 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 17:00:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:08,561 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:08,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash 94013567, now seen corresponding path program 13 times [2024-06-27 17:00:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700823733] [2024-06-27 17:00:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:00:08,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:08,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700823733] [2024-06-27 17:00:08,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700823733] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:08,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274202260] [2024-06-27 17:00:08,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:00:08,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:08,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:08,676 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 17:00:08,678 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 17:00:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:08,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:00:08,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:00:08,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:00:08,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274202260] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:08,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:08,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 17:00:08,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391906548] [2024-06-27 17:00:08,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:08,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:00:08,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:00:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:00:09,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 17:00:09,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1375 transitions, 18293 flow. Second operand has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 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 17:00:09,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:09,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 17:00:09,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:17,363 INFO L124 PetriNetUnfolderBase]: 25097/35491 cut-off events. [2024-06-27 17:00:17,363 INFO L125 PetriNetUnfolderBase]: For 479036/479052 co-relation queries the response was YES. [2024-06-27 17:00:17,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227760 conditions, 35491 events. 25097/35491 cut-off events. For 479036/479052 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 219297 event pairs, 1630 based on Foata normal form. 26/35515 useless extension candidates. Maximal degree in co-relation 227675. Up to 17728 conditions per place. [2024-06-27 17:00:17,744 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 976 selfloop transitions, 911 changer transitions 0/1891 dead transitions. [2024-06-27 17:00:17,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1891 transitions, 28249 flow [2024-06-27 17:00:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:00:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:00:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 409 transitions. [2024-06-27 17:00:17,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590347923681257 [2024-06-27 17:00:17,747 INFO L175 Difference]: Start difference. First operand has 374 places, 1375 transitions, 18293 flow. Second operand 27 states and 409 transitions. [2024-06-27 17:00:17,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1891 transitions, 28249 flow [2024-06-27 17:00:30,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1891 transitions, 26030 flow, removed 1027 selfloop flow, removed 13 redundant places. [2024-06-27 17:00:30,227 INFO L231 Difference]: Finished difference. Result has 393 places, 1540 transitions, 21774 flow [2024-06-27 17:00:30,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16733, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21774, PETRI_PLACES=393, PETRI_TRANSITIONS=1540} [2024-06-27 17:00:30,228 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 358 predicate places. [2024-06-27 17:00:30,228 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1540 transitions, 21774 flow [2024-06-27 17:00:30,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 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 17:00:30,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:30,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 17:00:30,239 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 17:00:30,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 17:00:30,429 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:30,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash 589114069, now seen corresponding path program 14 times [2024-06-27 17:00:30,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:30,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767675230] [2024-06-27 17:00:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:30,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 17:00:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767675230] [2024-06-27 17:00:30,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767675230] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:30,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019605140] [2024-06-27 17:00:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:00:30,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:30,536 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 17:00:30,541 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 17:00:30,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:00:30,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:30,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:00:30,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 17:00:30,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 17:00:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019605140] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:30,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:30,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 17:00:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140878437] [2024-06-27 17:00:30,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:30,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:00:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:30,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:00:30,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:00:30,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 17:00:30,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1540 transitions, 21774 flow. Second operand has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 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 17:00:30,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:30,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 17:00:30,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:39,376 INFO L124 PetriNetUnfolderBase]: 25404/36021 cut-off events. [2024-06-27 17:00:39,377 INFO L125 PetriNetUnfolderBase]: For 440231/440279 co-relation queries the response was YES. [2024-06-27 17:00:39,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233495 conditions, 36021 events. 25404/36021 cut-off events. For 440231/440279 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 224619 event pairs, 1477 based on Foata normal form. 33/36044 useless extension candidates. Maximal degree in co-relation 233413. Up to 18024 conditions per place. [2024-06-27 17:00:40,002 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 865 selfloop transitions, 801 changer transitions 0/1670 dead transitions. [2024-06-27 17:00:40,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1670 transitions, 26476 flow [2024-06-27 17:00:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 17:00:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 17:00:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 220 transitions. [2024-06-27 17:00:40,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 17:00:40,004 INFO L175 Difference]: Start difference. First operand has 393 places, 1540 transitions, 21774 flow. Second operand 16 states and 220 transitions. [2024-06-27 17:00:40,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1670 transitions, 26476 flow [2024-06-27 17:00:47,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1670 transitions, 25916 flow, removed 161 selfloop flow, removed 19 redundant places. [2024-06-27 17:00:47,795 INFO L231 Difference]: Finished difference. Result has 386 places, 1548 transitions, 22947 flow [2024-06-27 17:00:47,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=21123, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=22947, PETRI_PLACES=386, PETRI_TRANSITIONS=1548} [2024-06-27 17:00:47,797 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 351 predicate places. [2024-06-27 17:00:47,797 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1548 transitions, 22947 flow [2024-06-27 17:00:47,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 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 17:00:47,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:47,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 17:00:47,815 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 17:00:48,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:48,016 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:48,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1865206645, now seen corresponding path program 15 times [2024-06-27 17:00:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:48,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964516383] [2024-06-27 17:00:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:00:48,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:48,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964516383] [2024-06-27 17:00:48,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964516383] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:48,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389061560] [2024-06-27 17:00:48,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:00:48,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:48,126 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 17:00:48,136 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 17:00:48,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:00:48,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:48,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:00:48,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:00:48,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:00:48,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389061560] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:48,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:48,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 17:00:48,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912298293] [2024-06-27 17:00:48,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:48,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:00:48,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:00:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:00:48,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 17:00:48,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1548 transitions, 22947 flow. Second operand has 19 states, 19 states have (on average 7.7368421052631575) internal successors, (147), 19 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:48,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:48,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 17:00:48,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:56,376 INFO L124 PetriNetUnfolderBase]: 25364/35926 cut-off events. [2024-06-27 17:00:56,376 INFO L125 PetriNetUnfolderBase]: For 462169/462185 co-relation queries the response was YES. [2024-06-27 17:00:56,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238969 conditions, 35926 events. 25364/35926 cut-off events. For 462169/462185 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 223626 event pairs, 2251 based on Foata normal form. 26/35950 useless extension candidates. Maximal degree in co-relation 238902. Up to 18002 conditions per place. [2024-06-27 17:00:56,790 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 904 selfloop transitions, 856 changer transitions 0/1764 dead transitions. [2024-06-27 17:00:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1764 transitions, 28606 flow [2024-06-27 17:00:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:00:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:00:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 258 transitions. [2024-06-27 17:00:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-27 17:00:56,791 INFO L175 Difference]: Start difference. First operand has 386 places, 1548 transitions, 22947 flow. Second operand 18 states and 258 transitions. [2024-06-27 17:00:56,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1764 transitions, 28606 flow