./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.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-simple-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:06:58,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:06:58,931 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:06:58,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:06:58,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:06:58,975 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:06:58,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:06:58,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:06:58,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:06:58,977 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:06:58,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:06:58,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:06:58,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:06:58,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:06:58,983 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:06:58,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:06:58,984 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:06:58,985 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:06:58,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:06:58,985 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:06:58,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:06:58,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:06:58,986 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:06:58,987 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:06:58,987 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:06:58,987 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:06:58,988 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:06:58,988 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:06:58,989 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:06:58,989 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:06:58,990 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:06:58,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:06:58,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:06:58,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:06:58,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:06:58,991 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:06:58,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:06:58,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:06:58,992 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:06:58,992 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:06:58,992 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:06:58,992 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:06:58,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:06:58,993 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2024-06-27 17:06:59,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:06:59,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:06:59,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:06:59,219 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:06:59,220 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:06:59,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2024-06-27 17:07:00,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:07:00,591 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:07:00,592 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2024-06-27 17:07:00,603 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1b024ff/3cd788a1590745409bd2c16fe443d63b/FLAG31bba5e05 [2024-06-27 17:07:00,618 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1b024ff/3cd788a1590745409bd2c16fe443d63b [2024-06-27 17:07:00,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:07:00,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:07:00,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:07:00,627 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:07:00,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:07:00,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58689b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00, skipping insertion in model container [2024-06-27 17:07:00,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,668 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:07:00,815 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-simple-queue.wvr.c[2464,2477] [2024-06-27 17:07:00,825 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:07:00,832 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:07:00,852 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-simple-queue.wvr.c[2464,2477] [2024-06-27 17:07:00,861 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:07:00,884 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:07:00,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00 WrapperNode [2024-06-27 17:07:00,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:07:00,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:07:00,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:07:00,886 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:07:00,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,925 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2024-06-27 17:07:00,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:07:00,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:07:00,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:07:00,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:07:00,937 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,944 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,956 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:07:00,956 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,956 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,964 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,973 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,975 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:07:00,981 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:07:00,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:07:00,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:07:00,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:07:01,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:01,021 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 17:07:01,023 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 17:07:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:07:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:07:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:07:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:07:01,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:07:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:07:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:07:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:07:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:07:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:07:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:07:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:07:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:07:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:07:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:07:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:07:01,075 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 17:07:01,156 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:07:01,157 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:07:01,327 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:07:01,328 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:07:01,502 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:07:01,505 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:07:01,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:07:01 BoogieIcfgContainer [2024-06-27 17:07:01,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:07:01,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:07:01,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:07:01,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:07:01,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:07:00" (1/3) ... [2024-06-27 17:07:01,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54dea3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:07:01, skipping insertion in model container [2024-06-27 17:07:01,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (2/3) ... [2024-06-27 17:07:01,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54dea3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:07:01, skipping insertion in model container [2024-06-27 17:07:01,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:07:01" (3/3) ... [2024-06-27 17:07:01,514 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-06-27 17:07:01,521 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:07:01,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:07:01,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:07:01,530 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:07:01,581 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:07:01,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-06-27 17:07:01,653 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-06-27 17:07:01,653 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:07:01,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-06-27 17:07:01,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-06-27 17:07:01,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-06-27 17:07:01,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:07:01,678 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;@6c3b4832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:07:01,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:07:01,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:07:01,695 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-06-27 17:07:01,695 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:07:01,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:01,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:01,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:01,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1302421153, now seen corresponding path program 1 times [2024-06-27 17:07:01,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:01,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624232506] [2024-06-27 17:07:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:01,937 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 17:07:01,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:01,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624232506] [2024-06-27 17:07:01,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624232506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:01,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:01,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:07:01,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039067593] [2024-06-27 17:07:01,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-06-27 17:07:01,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-06-27 17:07:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-06-27 17:07:02,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:02,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:02,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:02,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:02,101 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-06-27 17:07:02,101 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:07:02,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 94 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-06-27 17:07:02,106 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-06-27 17:07:02,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-06-27 17:07:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-06-27 17:07:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-06-27 17:07:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-06-27 17:07:02,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 17:07:02,118 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-06-27 17:07:02,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-06-27 17:07:02,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:07:02,123 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-06-27 17:07:02,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-06-27 17:07:02,128 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-06-27 17:07:02,128 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-06-27 17:07:02,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:02,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:02,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:07:02,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:02,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -406957548, now seen corresponding path program 1 times [2024-06-27 17:07:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113180631] [2024-06-27 17:07:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:02,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:02,278 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 17:07:02,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113180631] [2024-06-27 17:07:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113180631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:02,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:02,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:07:02,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726736122] [2024-06-27 17:07:02,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:07:02,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:07:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:07:02,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:02,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:02,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:02,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:02,357 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-06-27 17:07:02,357 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-06-27 17:07:02,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1259 event pairs, 82 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-06-27 17:07:02,360 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-06-27 17:07:02,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-06-27 17:07:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:07:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:07:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-27 17:07:02,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 17:07:02,367 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-06-27 17:07:02,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-06-27 17:07:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:07:02,369 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-06-27 17:07:02,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-06-27 17:07:02,371 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-06-27 17:07:02,371 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-06-27 17:07:02,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:02,371 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] [2024-06-27 17:07:02,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:07:02,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:02,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash -132930614, now seen corresponding path program 1 times [2024-06-27 17:07:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:02,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369034847] [2024-06-27 17:07:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:02,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369034847] [2024-06-27 17:07:02,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369034847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:02,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:07:02,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614550790] [2024-06-27 17:07:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:02,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:07:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:07:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:07:02,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:02,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:02,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:02,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:02,632 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-06-27 17:07:02,633 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-06-27 17:07:02,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1673 event pairs, 113 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-06-27 17:07:02,639 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-06-27 17:07:02,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-06-27 17:07:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:07:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:07:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-06-27 17:07:02,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 17:07:02,643 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-06-27 17:07:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-06-27 17:07:02,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:07:02,645 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-06-27 17:07:02,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-06-27 17:07:02,646 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-06-27 17:07:02,646 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-06-27 17:07:02,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:02,647 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:02,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:07:02,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:02,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1274929099, now seen corresponding path program 1 times [2024-06-27 17:07:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057298976] [2024-06-27 17:07:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:02,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:02,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057298976] [2024-06-27 17:07:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057298976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:02,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:02,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:07:02,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782184176] [2024-06-27 17:07:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:02,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:07:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:07:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:07:02,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:02,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:02,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:02,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:02,973 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-06-27 17:07:02,973 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-06-27 17:07:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2454 event pairs, 285 based on Foata normal form. 12/501 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-06-27 17:07:02,977 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-06-27 17:07:02,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-06-27 17:07:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:07:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:07:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-06-27 17:07:02,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 17:07:02,981 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-06-27 17:07:02,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-06-27 17:07:02,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:07:02,984 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-06-27 17:07:02,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-27 17:07:02,986 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-06-27 17:07:02,986 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-06-27 17:07:02,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:02,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:02,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:07:02,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:02,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2016933381, now seen corresponding path program 1 times [2024-06-27 17:07:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:02,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186136982] [2024-06-27 17:07:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:03,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186136982] [2024-06-27 17:07:03,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186136982] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:03,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524644315] [2024-06-27 17:07:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:03,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:03,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:03,480 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 17:07:03,496 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 17:07:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:03,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 17:07:03,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:03,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:03,934 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:07:03,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-06-27 17:07:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524644315] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:04,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:04,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-06-27 17:07:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599266951] [2024-06-27 17:07:04,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:04,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:07:04,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:07:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:07:04,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:04,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:04,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:04,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:04,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:04,583 INFO L124 PetriNetUnfolderBase]: 911/1594 cut-off events. [2024-06-27 17:07:04,583 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-06-27 17:07:04,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 1594 events. 911/1594 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7631 event pairs, 172 based on Foata normal form. 3/1350 useless extension candidates. Maximal degree in co-relation 3494. Up to 292 conditions per place. [2024-06-27 17:07:04,591 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 107 selfloop transitions, 16 changer transitions 27/153 dead transitions. [2024-06-27 17:07:04,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 153 transitions, 705 flow [2024-06-27 17:07:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:07:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:07:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-06-27 17:07:04,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-27 17:07:04,594 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 13 states and 217 transitions. [2024-06-27 17:07:04,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 153 transitions, 705 flow [2024-06-27 17:07:04,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 153 transitions, 697 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:07:04,598 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 206 flow [2024-06-27 17:07:04,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=206, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-06-27 17:07:04,599 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2024-06-27 17:07:04,599 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 206 flow [2024-06-27 17:07:04,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:04,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:04,599 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:04,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 17:07:04,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:04,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:04,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:04,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2052628911, now seen corresponding path program 2 times [2024-06-27 17:07:04,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:04,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855845146] [2024-06-27 17:07:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:07:04,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:04,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855845146] [2024-06-27 17:07:04,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855845146] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:04,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647950448] [2024-06-27 17:07:04,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:07:04,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:04,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:04,906 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 17:07:04,908 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 17:07:04,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:07:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:04,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:07:04,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:07:05,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:07:05,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647950448] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:05,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:05,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-06-27 17:07:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684105205] [2024-06-27 17:07:05,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:05,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:07:05,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:05,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:07:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:07:05,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:05,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 206 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 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 17:07:05,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:05,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:05,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:05,458 INFO L124 PetriNetUnfolderBase]: 1097/1958 cut-off events. [2024-06-27 17:07:05,458 INFO L125 PetriNetUnfolderBase]: For 1580/1580 co-relation queries the response was YES. [2024-06-27 17:07:05,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 1958 events. 1097/1958 cut-off events. For 1580/1580 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9870 event pairs, 348 based on Foata normal form. 64/1710 useless extension candidates. Maximal degree in co-relation 4698. Up to 462 conditions per place. [2024-06-27 17:07:05,467 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 49 selfloop transitions, 9 changer transitions 68/129 dead transitions. [2024-06-27 17:07:05,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 129 transitions, 682 flow [2024-06-27 17:07:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:07:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:07:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 17:07:05,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-27 17:07:05,471 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 206 flow. Second operand 11 states and 181 transitions. [2024-06-27 17:07:05,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 129 transitions, 682 flow [2024-06-27 17:07:05,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 129 transitions, 642 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 17:07:05,481 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 183 flow [2024-06-27 17:07:05,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=183, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2024-06-27 17:07:05,483 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2024-06-27 17:07:05,483 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 183 flow [2024-06-27 17:07:05,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 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 17:07:05,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:05,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:05,502 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 17:07:05,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 17:07:05,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:05,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash 178691706, now seen corresponding path program 3 times [2024-06-27 17:07:05,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:05,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663912471] [2024-06-27 17:07:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:05,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:06,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:06,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663912471] [2024-06-27 17:07:06,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663912471] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:06,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855654784] [2024-06-27 17:07:06,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:07:06,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:06,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:06,173 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 17:07:06,191 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 17:07:06,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 17:07:06,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:06,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2024-06-27 17:07:06,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:06,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:06,508 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:07:06,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-06-27 17:07:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:06,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855654784] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:06,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:06,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-06-27 17:07:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473595933] [2024-06-27 17:07:06,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:06,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:07:06,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:07:06,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:07:06,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:06,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 183 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 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 17:07:06,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:06,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:07,750 INFO L124 PetriNetUnfolderBase]: 1387/2475 cut-off events. [2024-06-27 17:07:07,750 INFO L125 PetriNetUnfolderBase]: For 2671/2671 co-relation queries the response was YES. [2024-06-27 17:07:07,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6227 conditions, 2475 events. 1387/2475 cut-off events. For 2671/2671 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13075 event pairs, 224 based on Foata normal form. 52/2131 useless extension candidates. Maximal degree in co-relation 6212. Up to 450 conditions per place. [2024-06-27 17:07:07,761 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 92 selfloop transitions, 15 changer transitions 82/192 dead transitions. [2024-06-27 17:07:07,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 192 transitions, 1050 flow [2024-06-27 17:07:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:07:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:07:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 278 transitions. [2024-06-27 17:07:07,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-27 17:07:07,764 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 183 flow. Second operand 18 states and 278 transitions. [2024-06-27 17:07:07,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 192 transitions, 1050 flow [2024-06-27 17:07:07,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 192 transitions, 982 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 17:07:07,772 INFO L231 Difference]: Finished difference. Result has 65 places, 39 transitions, 264 flow [2024-06-27 17:07:07,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=264, PETRI_PLACES=65, PETRI_TRANSITIONS=39} [2024-06-27 17:07:07,772 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-06-27 17:07:07,773 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 39 transitions, 264 flow [2024-06-27 17:07:07,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 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 17:07:07,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:07,773 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:07,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 17:07:07,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:07,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:07,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:07,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1647887852, now seen corresponding path program 4 times [2024-06-27 17:07:07,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:07,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090488632] [2024-06-27 17:07:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:08,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:08,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090488632] [2024-06-27 17:07:08,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090488632] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:08,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792305733] [2024-06-27 17:07:08,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:07:08,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:08,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:08,444 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 17:07:08,472 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 17:07:08,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:07:08,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:08,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 17:07:08,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:08,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:07:08,837 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:07:08,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-06-27 17:07:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:08,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:09,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-06-27 17:07:09,245 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:07:09,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 17:07:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:09,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792305733] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:09,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:09,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 17:07:09,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611760180] [2024-06-27 17:07:09,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:09,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:07:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:07:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:07:09,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:09,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 39 transitions, 264 flow. Second operand has 24 states, 24 states have (on average 8.208333333333334) internal successors, (197), 24 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 17:07:09,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:09,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:09,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:10,164 INFO L124 PetriNetUnfolderBase]: 1097/1959 cut-off events. [2024-06-27 17:07:10,164 INFO L125 PetriNetUnfolderBase]: For 2220/2220 co-relation queries the response was YES. [2024-06-27 17:07:10,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5051 conditions, 1959 events. 1097/1959 cut-off events. For 2220/2220 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9925 event pairs, 427 based on Foata normal form. 1/1649 useless extension candidates. Maximal degree in co-relation 5030. Up to 820 conditions per place. [2024-06-27 17:07:10,174 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 35 selfloop transitions, 6 changer transitions 71/115 dead transitions. [2024-06-27 17:07:10,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 115 transitions, 683 flow [2024-06-27 17:07:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:07:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:07:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-06-27 17:07:10,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-06-27 17:07:10,175 INFO L175 Difference]: Start difference. First operand has 65 places, 39 transitions, 264 flow. Second operand 11 states and 160 transitions. [2024-06-27 17:07:10,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 115 transitions, 683 flow [2024-06-27 17:07:10,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 628 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 17:07:10,183 INFO L231 Difference]: Finished difference. Result has 62 places, 34 transitions, 189 flow [2024-06-27 17:07:10,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=189, PETRI_PLACES=62, PETRI_TRANSITIONS=34} [2024-06-27 17:07:10,184 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2024-06-27 17:07:10,184 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 34 transitions, 189 flow [2024-06-27 17:07:10,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.208333333333334) internal successors, (197), 24 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 17:07:10,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:10,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:10,204 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 17:07:10,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:10,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:10,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:10,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2122792042, now seen corresponding path program 5 times [2024-06-27 17:07:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625392291] [2024-06-27 17:07:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:11,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625392291] [2024-06-27 17:07:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625392291] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499155108] [2024-06-27 17:07:11,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:07:11,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:11,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:11,170 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 17:07:11,194 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 17:07:11,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:07:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:11,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 17:07:11,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:07:11,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:11,387 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:07:11,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-06-27 17:07:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:07:11,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499155108] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:11,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:11,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 16 [2024-06-27 17:07:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098550947] [2024-06-27 17:07:11,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:07:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:11,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:07:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:07:11,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:11,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 34 transitions, 189 flow. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 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 17:07:11,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:11,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:11,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:12,065 INFO L124 PetriNetUnfolderBase]: 1379/2406 cut-off events. [2024-06-27 17:07:12,065 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-27 17:07:12,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6203 conditions, 2406 events. 1379/2406 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11961 event pairs, 208 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 6185. Up to 427 conditions per place. [2024-06-27 17:07:12,077 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 95 selfloop transitions, 23 changer transitions 39/160 dead transitions. [2024-06-27 17:07:12,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 160 transitions, 907 flow [2024-06-27 17:07:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:07:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:07:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2024-06-27 17:07:12,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 17:07:12,079 INFO L175 Difference]: Start difference. First operand has 62 places, 34 transitions, 189 flow. Second operand 15 states and 231 transitions. [2024-06-27 17:07:12,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 160 transitions, 907 flow [2024-06-27 17:07:12,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 160 transitions, 873 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 17:07:12,090 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 366 flow [2024-06-27 17:07:12,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=366, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2024-06-27 17:07:12,091 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2024-06-27 17:07:12,091 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 366 flow [2024-06-27 17:07:12,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 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 17:07:12,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:12,092 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:12,111 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 17:07:12,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:12,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:12,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 898550012, now seen corresponding path program 6 times [2024-06-27 17:07:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266507007] [2024-06-27 17:07:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-27 17:07:12,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:12,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266507007] [2024-06-27 17:07:12,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266507007] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:12,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138357942] [2024-06-27 17:07:12,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:07:12,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:12,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:12,396 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 17:07:12,416 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 17:07:12,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:07:12,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:12,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:07:12,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-27 17:07:12,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:07:12,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138357942] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:12,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:12,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-06-27 17:07:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746064263] [2024-06-27 17:07:12,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:07:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:07:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:07:12,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:12,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:12,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:12,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:12,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:13,062 INFO L124 PetriNetUnfolderBase]: 2657/4606 cut-off events. [2024-06-27 17:07:13,062 INFO L125 PetriNetUnfolderBase]: For 7265/7265 co-relation queries the response was YES. [2024-06-27 17:07:13,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12294 conditions, 4606 events. 2657/4606 cut-off events. For 7265/7265 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25707 event pairs, 713 based on Foata normal form. 22/3911 useless extension candidates. Maximal degree in co-relation 12273. Up to 1360 conditions per place. [2024-06-27 17:07:13,085 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 74 selfloop transitions, 27 changer transitions 0/104 dead transitions. [2024-06-27 17:07:13,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 104 transitions, 922 flow [2024-06-27 17:07:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:07:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:07:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 17:07:13,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-27 17:07:13,087 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 366 flow. Second operand 5 states and 93 transitions. [2024-06-27 17:07:13,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 104 transitions, 922 flow [2024-06-27 17:07:13,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 762 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 17:07:13,098 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 512 flow [2024-06-27 17:07:13,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-27 17:07:13,100 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2024-06-27 17:07:13,100 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 512 flow [2024-06-27 17:07:13,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:13,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:13,101 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:13,116 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 17:07:13,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:13,317 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:13,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash -846417175, now seen corresponding path program 7 times [2024-06-27 17:07:13,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:13,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199738475] [2024-06-27 17:07:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:13,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199738475] [2024-06-27 17:07:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199738475] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297724434] [2024-06-27 17:07:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:07:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:13,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:13,856 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 17:07:13,863 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 17:07:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:13,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 17:07:13,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:14,278 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:07:14,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-06-27 17:07:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:14,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:14,333 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:07:14,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-06-27 17:07:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:14,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297724434] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:14,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:14,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-06-27 17:07:14,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982700370] [2024-06-27 17:07:14,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:14,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 17:07:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 17:07:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 17:07:14,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:14,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 512 flow. Second operand has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:14,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:14,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:14,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:17,142 INFO L124 PetriNetUnfolderBase]: 5351/9326 cut-off events. [2024-06-27 17:07:17,143 INFO L125 PetriNetUnfolderBase]: For 11944/11944 co-relation queries the response was YES. [2024-06-27 17:07:17,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24316 conditions, 9326 events. 5351/9326 cut-off events. For 11944/11944 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 59374 event pairs, 561 based on Foata normal form. 129/7986 useless extension candidates. Maximal degree in co-relation 24295. Up to 1725 conditions per place. [2024-06-27 17:07:17,203 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 233 selfloop transitions, 78 changer transitions 69/383 dead transitions. [2024-06-27 17:07:17,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 383 transitions, 2477 flow [2024-06-27 17:07:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 17:07:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 17:07:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 499 transitions. [2024-06-27 17:07:17,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594047619047619 [2024-06-27 17:07:17,207 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 512 flow. Second operand 30 states and 499 transitions. [2024-06-27 17:07:17,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 383 transitions, 2477 flow [2024-06-27 17:07:17,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 383 transitions, 2363 flow, removed 57 selfloop flow, removed 0 redundant places. [2024-06-27 17:07:17,305 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 1123 flow [2024-06-27 17:07:17,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1123, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-06-27 17:07:17,305 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2024-06-27 17:07:17,306 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 1123 flow [2024-06-27 17:07:17,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:17,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:17,306 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:17,320 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 17:07:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:17,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:17,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash -591025093, now seen corresponding path program 8 times [2024-06-27 17:07:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:17,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318119660] [2024-06-27 17:07:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:18,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318119660] [2024-06-27 17:07:18,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318119660] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045800773] [2024-06-27 17:07:18,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:07:18,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:18,010 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 17:07:18,026 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 17:07:18,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:07:18,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:18,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 17:07:18,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:18,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:07:18,562 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-06-27 17:07:18,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2024-06-27 17:07:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:18,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:19,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-06-27 17:07:19,262 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:07:19,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 17:07:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:19,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045800773] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:19,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:19,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-06-27 17:07:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9330377] [2024-06-27 17:07:19,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 17:07:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 17:07:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 17:07:19,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:19,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 1123 flow. Second operand has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 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 17:07:19,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:19,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:19,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:22,041 INFO L124 PetriNetUnfolderBase]: 5132/8936 cut-off events. [2024-06-27 17:07:22,041 INFO L125 PetriNetUnfolderBase]: For 20993/20993 co-relation queries the response was YES. [2024-06-27 17:07:22,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 8936 events. 5132/8936 cut-off events. For 20993/20993 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 57632 event pairs, 1814 based on Foata normal form. 2/7532 useless extension candidates. Maximal degree in co-relation 24958. Up to 4746 conditions per place. [2024-06-27 17:07:22,095 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 72 selfloop transitions, 10 changer transitions 198/283 dead transitions. [2024-06-27 17:07:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 283 transitions, 2163 flow [2024-06-27 17:07:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 17:07:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 17:07:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 337 transitions. [2024-06-27 17:07:22,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547077922077922 [2024-06-27 17:07:22,098 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 1123 flow. Second operand 22 states and 337 transitions. [2024-06-27 17:07:22,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 283 transitions, 2163 flow [2024-06-27 17:07:22,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 283 transitions, 2066 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 17:07:22,186 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 735 flow [2024-06-27 17:07:22,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=735, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2024-06-27 17:07:22,187 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-06-27 17:07:22,187 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 735 flow [2024-06-27 17:07:22,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 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 17:07:22,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:22,188 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:22,208 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 17:07:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 17:07:22,404 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:22,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash -275602663, now seen corresponding path program 9 times [2024-06-27 17:07:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:22,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334521657] [2024-06-27 17:07:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334521657] [2024-06-27 17:07:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334521657] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528708548] [2024-06-27 17:07:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:07:23,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:23,282 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 17:07:23,300 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 17:07:23,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:07:23,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:23,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 17:07:23,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:23,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 17:07:23,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 17:07:23,831 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-06-27 17:07:23,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2024-06-27 17:07:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:07:23,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:24,684 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 83 treesize of output 77 [2024-06-27 17:07:24,698 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2024-06-27 17:07:24,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 158 [2024-06-27 17:07:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:07:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528708548] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:24,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-06-27 17:07:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657364341] [2024-06-27 17:07:24,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 17:07:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 17:07:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 17:07:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:24,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 735 flow. Second operand has 34 states, 34 states have (on average 7.852941176470588) internal successors, (267), 34 states have internal predecessors, (267), 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 17:07:24,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:24,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:29,462 INFO L124 PetriNetUnfolderBase]: 8936/15438 cut-off events. [2024-06-27 17:07:29,463 INFO L125 PetriNetUnfolderBase]: For 43119/43119 co-relation queries the response was YES. [2024-06-27 17:07:29,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43596 conditions, 15438 events. 8936/15438 cut-off events. For 43119/43119 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 107599 event pairs, 2674 based on Foata normal form. 105/13127 useless extension candidates. Maximal degree in co-relation 43556. Up to 4746 conditions per place. [2024-06-27 17:07:29,518 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 72 selfloop transitions, 9 changer transitions 424/508 dead transitions. [2024-06-27 17:07:29,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 508 transitions, 3980 flow [2024-06-27 17:07:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:07:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:07:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 579 transitions. [2024-06-27 17:07:29,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5908163265306122 [2024-06-27 17:07:29,523 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 735 flow. Second operand 35 states and 579 transitions. [2024-06-27 17:07:29,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 508 transitions, 3980 flow [2024-06-27 17:07:30,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 508 transitions, 3430 flow, removed 152 selfloop flow, removed 19 redundant places. [2024-06-27 17:07:30,074 INFO L231 Difference]: Finished difference. Result has 137 places, 73 transitions, 737 flow [2024-06-27 17:07:30,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=737, PETRI_PLACES=137, PETRI_TRANSITIONS=73} [2024-06-27 17:07:30,074 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 110 predicate places. [2024-06-27 17:07:30,074 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 73 transitions, 737 flow [2024-06-27 17:07:30,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.852941176470588) internal successors, (267), 34 states have internal predecessors, (267), 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 17:07:30,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:30,075 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:30,093 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 17:07:30,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 17:07:30,294 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:30,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1457377621, now seen corresponding path program 10 times [2024-06-27 17:07:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:30,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774866364] [2024-06-27 17:07:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:31,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774866364] [2024-06-27 17:07:31,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774866364] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:31,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312114152] [2024-06-27 17:07:31,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:07:31,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:31,371 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 17:07:31,377 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 17:07:31,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:07:31,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:31,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 17:07:31,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:07:31,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:31,737 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:07:31,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-06-27 17:07:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 17:07:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312114152] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:31,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 23 [2024-06-27 17:07:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140397550] [2024-06-27 17:07:31,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:07:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:07:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:07:31,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:31,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 73 transitions, 737 flow. Second operand has 24 states, 24 states have (on average 7.958333333333333) internal successors, (191), 24 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:31,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:31,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:33,452 INFO L124 PetriNetUnfolderBase]: 5286/9079 cut-off events. [2024-06-27 17:07:33,453 INFO L125 PetriNetUnfolderBase]: For 51419/51419 co-relation queries the response was YES. [2024-06-27 17:07:33,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28636 conditions, 9079 events. 5286/9079 cut-off events. For 51419/51419 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 56008 event pairs, 604 based on Foata normal form. 15/7688 useless extension candidates. Maximal degree in co-relation 28580. Up to 1650 conditions per place. [2024-06-27 17:07:33,502 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 127 selfloop transitions, 86 changer transitions 57/273 dead transitions. [2024-06-27 17:07:33,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 273 transitions, 2398 flow [2024-06-27 17:07:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 17:07:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 17:07:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 326 transitions. [2024-06-27 17:07:33,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-27 17:07:33,504 INFO L175 Difference]: Start difference. First operand has 137 places, 73 transitions, 737 flow. Second operand 21 states and 326 transitions. [2024-06-27 17:07:33,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 273 transitions, 2398 flow [2024-06-27 17:07:33,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 273 transitions, 1952 flow, removed 211 selfloop flow, removed 33 redundant places. [2024-06-27 17:07:33,797 INFO L231 Difference]: Finished difference. Result has 110 places, 108 transitions, 1352 flow [2024-06-27 17:07:33,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1352, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2024-06-27 17:07:33,798 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 83 predicate places. [2024-06-27 17:07:33,798 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 1352 flow [2024-06-27 17:07:33,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.958333333333333) internal successors, (191), 24 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:33,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:33,798 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:33,814 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 17:07:34,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 17:07:34,012 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:34,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1652630351, now seen corresponding path program 11 times [2024-06-27 17:07:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:34,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853091818] [2024-06-27 17:07:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:34,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-06-27 17:07:34,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:34,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853091818] [2024-06-27 17:07:34,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853091818] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:34,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612369571] [2024-06-27 17:07:34,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:07:34,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:34,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:34,121 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 17:07:34,144 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 17:07:34,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 17:07:34,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:34,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:07:34,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-06-27 17:07:34,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 17:07:34,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612369571] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:34,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:34,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2024-06-27 17:07:34,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936919590] [2024-06-27 17:07:34,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:34,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:07:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:34,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:07:34,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:07:34,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:34,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 1352 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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 17:07:34,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:34,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:34,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:36,172 INFO L124 PetriNetUnfolderBase]: 9364/16041 cut-off events. [2024-06-27 17:07:36,172 INFO L125 PetriNetUnfolderBase]: For 39881/39881 co-relation queries the response was YES. [2024-06-27 17:07:36,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46300 conditions, 16041 events. 9364/16041 cut-off events. For 39881/39881 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 109522 event pairs, 1913 based on Foata normal form. 22/13578 useless extension candidates. Maximal degree in co-relation 46257. Up to 4280 conditions per place. [2024-06-27 17:07:36,252 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 110 selfloop transitions, 104 changer transitions 0/217 dead transitions. [2024-06-27 17:07:36,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 217 transitions, 2999 flow [2024-06-27 17:07:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:07:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:07:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 17:07:36,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 17:07:36,254 INFO L175 Difference]: Start difference. First operand has 110 places, 108 transitions, 1352 flow. Second operand 6 states and 114 transitions. [2024-06-27 17:07:36,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 217 transitions, 2999 flow [2024-06-27 17:07:36,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 217 transitions, 2771 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-27 17:07:36,370 INFO L231 Difference]: Finished difference. Result has 110 places, 161 transitions, 2325 flow [2024-06-27 17:07:36,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2325, PETRI_PLACES=110, PETRI_TRANSITIONS=161} [2024-06-27 17:07:36,371 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 83 predicate places. [2024-06-27 17:07:36,371 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 161 transitions, 2325 flow [2024-06-27 17:07:36,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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 17:07:36,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:36,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:36,383 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 17:07:36,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:07:36,573 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash -31066858, now seen corresponding path program 12 times [2024-06-27 17:07:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:36,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312888952] [2024-06-27 17:07:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:37,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:37,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312888952] [2024-06-27 17:07:37,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312888952] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:37,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452704050] [2024-06-27 17:07:37,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:07:37,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:37,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:37,643 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 17:07:37,644 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 17:07:37,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-06-27 17:07:37,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:37,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:07:37,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-27 17:07:37,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:37,987 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:07:37,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-06-27 17:07:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 17:07:38,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452704050] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:38,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:38,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 10] total 29 [2024-06-27 17:07:38,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591961575] [2024-06-27 17:07:38,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:38,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 17:07:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 17:07:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-06-27 17:07:38,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:38,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 161 transitions, 2325 flow. Second operand has 30 states, 30 states have (on average 8.4) internal successors, (252), 30 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:38,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:38,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:38,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:42,242 INFO L124 PetriNetUnfolderBase]: 15025/25756 cut-off events. [2024-06-27 17:07:42,242 INFO L125 PetriNetUnfolderBase]: For 70741/70741 co-relation queries the response was YES. [2024-06-27 17:07:42,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74825 conditions, 25756 events. 15025/25756 cut-off events. For 70741/70741 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 187125 event pairs, 1258 based on Foata normal form. 16/21779 useless extension candidates. Maximal degree in co-relation 74781. Up to 4725 conditions per place. [2024-06-27 17:07:42,395 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 376 selfloop transitions, 225 changer transitions 90/694 dead transitions. [2024-06-27 17:07:42,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 694 transitions, 6738 flow [2024-06-27 17:07:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-06-27 17:07:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-06-27 17:07:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 764 transitions. [2024-06-27 17:07:42,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063492063492063 [2024-06-27 17:07:42,398 INFO L175 Difference]: Start difference. First operand has 110 places, 161 transitions, 2325 flow. Second operand 45 states and 764 transitions. [2024-06-27 17:07:42,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 694 transitions, 6738 flow [2024-06-27 17:07:42,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 694 transitions, 6406 flow, removed 166 selfloop flow, removed 0 redundant places. [2024-06-27 17:07:42,735 INFO L231 Difference]: Finished difference. Result has 170 places, 259 transitions, 3975 flow [2024-06-27 17:07:42,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3975, PETRI_PLACES=170, PETRI_TRANSITIONS=259} [2024-06-27 17:07:42,735 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 143 predicate places. [2024-06-27 17:07:42,735 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 259 transitions, 3975 flow [2024-06-27 17:07:42,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.4) internal successors, (252), 30 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:42,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:42,736 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:42,758 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 17:07:42,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 17:07:42,936 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:42,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash 618730928, now seen corresponding path program 13 times [2024-06-27 17:07:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234881841] [2024-06-27 17:07:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:43,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:43,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234881841] [2024-06-27 17:07:43,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234881841] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:43,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668926173] [2024-06-27 17:07:43,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:07:43,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:43,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:43,845 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 17:07:43,867 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 17:07:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:43,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-27 17:07:43,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:07:44,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:44,382 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:07:44,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-06-27 17:07:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 17:07:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668926173] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:44,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:44,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 28 [2024-06-27 17:07:44,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310495949] [2024-06-27 17:07:44,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:44,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 17:07:44,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 17:07:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-06-27 17:07:44,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:44,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 259 transitions, 3975 flow. Second operand has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:44,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:44,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:44,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:49,452 INFO L124 PetriNetUnfolderBase]: 18305/31302 cut-off events. [2024-06-27 17:07:49,452 INFO L125 PetriNetUnfolderBase]: For 110605/110605 co-relation queries the response was YES. [2024-06-27 17:07:49,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91535 conditions, 31302 events. 18305/31302 cut-off events. For 110605/110605 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 235131 event pairs, 2147 based on Foata normal form. 29/26477 useless extension candidates. Maximal degree in co-relation 91474. Up to 5750 conditions per place. [2024-06-27 17:07:49,747 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 174 selfloop transitions, 285 changer transitions 93/555 dead transitions. [2024-06-27 17:07:49,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 555 transitions, 6353 flow [2024-06-27 17:07:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:07:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:07:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 460 transitions. [2024-06-27 17:07:49,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-06-27 17:07:49,754 INFO L175 Difference]: Start difference. First operand has 170 places, 259 transitions, 3975 flow. Second operand 28 states and 460 transitions. [2024-06-27 17:07:49,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 555 transitions, 6353 flow [2024-06-27 17:07:50,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 555 transitions, 5795 flow, removed 68 selfloop flow, removed 13 redundant places. [2024-06-27 17:07:50,262 INFO L231 Difference]: Finished difference. Result has 200 places, 307 transitions, 5221 flow [2024-06-27 17:07:50,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5221, PETRI_PLACES=200, PETRI_TRANSITIONS=307} [2024-06-27 17:07:50,262 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2024-06-27 17:07:50,263 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 307 transitions, 5221 flow [2024-06-27 17:07:50,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:50,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:50,263 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:50,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-27 17:07:50,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 17:07:50,479 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:50,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1537074276, now seen corresponding path program 14 times [2024-06-27 17:07:50,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:50,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437346440] [2024-06-27 17:07:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-06-27 17:07:50,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:50,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437346440] [2024-06-27 17:07:50,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437346440] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:50,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060276675] [2024-06-27 17:07:50,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:07:50,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:50,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:50,803 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 17:07:50,804 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 17:07:50,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:07:50,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:50,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:07:50,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-06-27 17:07:50,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 17:07:51,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060276675] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:51,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:51,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2024-06-27 17:07:51,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310520070] [2024-06-27 17:07:51,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:51,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:07:51,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:07:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:07:51,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:07:51,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 307 transitions, 5221 flow. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:51,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:51,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:07:51,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:58,446 INFO L124 PetriNetUnfolderBase]: 28463/48602 cut-off events. [2024-06-27 17:07:58,446 INFO L125 PetriNetUnfolderBase]: For 181774/181774 co-relation queries the response was YES. [2024-06-27 17:07:58,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148595 conditions, 48602 events. 28463/48602 cut-off events. For 181774/181774 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 387818 event pairs, 4951 based on Foata normal form. 22/41095 useless extension candidates. Maximal degree in co-relation 148517. Up to 10850 conditions per place. [2024-06-27 17:07:59,044 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 169 selfloop transitions, 335 changer transitions 0/507 dead transitions. [2024-06-27 17:07:59,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 507 transitions, 9493 flow [2024-06-27 17:07:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:07:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:07:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 17:07:59,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-06-27 17:07:59,046 INFO L175 Difference]: Start difference. First operand has 200 places, 307 transitions, 5221 flow. Second operand 7 states and 135 transitions. [2024-06-27 17:07:59,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 507 transitions, 9493 flow [2024-06-27 17:08:00,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 507 transitions, 8728 flow, removed 177 selfloop flow, removed 25 redundant places. [2024-06-27 17:08:00,145 INFO L231 Difference]: Finished difference. Result has 182 places, 437 transitions, 8040 flow [2024-06-27 17:08:00,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8040, PETRI_PLACES=182, PETRI_TRANSITIONS=437} [2024-06-27 17:08:00,146 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 155 predicate places. [2024-06-27 17:08:00,146 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 437 transitions, 8040 flow [2024-06-27 17:08:00,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:08:00,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:00,146 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:00,158 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 17:08:00,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:00,347 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:00,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash -826604279, now seen corresponding path program 15 times [2024-06-27 17:08:00,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:00,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651514542] [2024-06-27 17:08:00,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651514542] [2024-06-27 17:08:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651514542] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:08:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457423321] [2024-06-27 17:08:01,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:08:01,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:01,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:01,044 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 17:08:01,055 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 17:08:01,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-06-27 17:08:01,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:08:01,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 17:08:01,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:08:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 17:08:01,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:08:01,835 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:08:01,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-06-27 17:08:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 17:08:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457423321] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:08:02,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:08:02,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-06-27 17:08:02,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385072177] [2024-06-27 17:08:02,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:08:02,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-06-27 17:08:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:02,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-06-27 17:08:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2024-06-27 17:08:02,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:08:02,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 437 transitions, 8040 flow. Second operand has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 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 17:08:02,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:02,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:08:02,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:11,861 INFO L124 PetriNetUnfolderBase]: 25421/44165 cut-off events. [2024-06-27 17:08:11,861 INFO L125 PetriNetUnfolderBase]: For 180286/180286 co-relation queries the response was YES. [2024-06-27 17:08:12,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133579 conditions, 44165 events. 25421/44165 cut-off events. For 180286/180286 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 363463 event pairs, 8115 based on Foata normal form. 814/37979 useless extension candidates. Maximal degree in co-relation 133514. Up to 25248 conditions per place. [2024-06-27 17:08:12,202 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 336 selfloop transitions, 36 changer transitions 357/732 dead transitions. [2024-06-27 17:08:12,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 732 transitions, 9624 flow [2024-06-27 17:08:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 17:08:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 17:08:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 593 transitions. [2024-06-27 17:08:12,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573308270676691 [2024-06-27 17:08:12,205 INFO L175 Difference]: Start difference. First operand has 182 places, 437 transitions, 8040 flow. Second operand 38 states and 593 transitions. [2024-06-27 17:08:12,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 732 transitions, 9624 flow [2024-06-27 17:08:13,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 732 transitions, 9194 flow, removed 211 selfloop flow, removed 2 redundant places. [2024-06-27 17:08:13,453 INFO L231 Difference]: Finished difference. Result has 233 places, 264 transitions, 4607 flow [2024-06-27 17:08:13,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4607, PETRI_PLACES=233, PETRI_TRANSITIONS=264} [2024-06-27 17:08:13,454 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 206 predicate places. [2024-06-27 17:08:13,454 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 264 transitions, 4607 flow [2024-06-27 17:08:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 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 17:08:13,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:13,454 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:13,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 17:08:13,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:13,655 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:13,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1467000485, now seen corresponding path program 16 times [2024-06-27 17:08:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:13,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328088088] [2024-06-27 17:08:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:13,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328088088] [2024-06-27 17:08:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328088088] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:08:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463289064] [2024-06-27 17:08:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:08:14,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:14,322 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 17:08:14,323 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 17:08:14,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:08:14,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:08:14,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 17:08:14,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:08:14,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:08:15,037 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:08:15,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-06-27 17:08:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:15,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:08:15,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-06-27 17:08:15,752 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:08:15,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 17:08:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463289064] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:08:16,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:08:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2024-06-27 17:08:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727619742] [2024-06-27 17:08:16,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:08:16,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-06-27 17:08:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-06-27 17:08:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2024-06-27 17:08:16,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:08:16,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 264 transitions, 4607 flow. Second operand has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 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 17:08:16,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:16,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:08:16,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:08:22,597 INFO L124 PetriNetUnfolderBase]: 16694/28660 cut-off events. [2024-06-27 17:08:22,597 INFO L125 PetriNetUnfolderBase]: For 136310/136310 co-relation queries the response was YES. [2024-06-27 17:08:22,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90890 conditions, 28660 events. 16694/28660 cut-off events. For 136310/136310 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 217721 event pairs, 8115 based on Foata normal form. 1/24202 useless extension candidates. Maximal degree in co-relation 90808. Up to 25248 conditions per place. [2024-06-27 17:08:22,898 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 322 selfloop transitions, 27 changer transitions 129/481 dead transitions. [2024-06-27 17:08:22,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 481 transitions, 6203 flow [2024-06-27 17:08:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:08:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:08:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 391 transitions. [2024-06-27 17:08:22,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370879120879121 [2024-06-27 17:08:22,900 INFO L175 Difference]: Start difference. First operand has 233 places, 264 transitions, 4607 flow. Second operand 26 states and 391 transitions. [2024-06-27 17:08:22,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 481 transitions, 6203 flow [2024-06-27 17:08:23,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 481 transitions, 5697 flow, removed 105 selfloop flow, removed 48 redundant places. [2024-06-27 17:08:23,959 INFO L231 Difference]: Finished difference. Result has 183 places, 258 transitions, 4115 flow [2024-06-27 17:08:23,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4115, PETRI_PLACES=183, PETRI_TRANSITIONS=258} [2024-06-27 17:08:23,960 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 156 predicate places. [2024-06-27 17:08:23,960 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 258 transitions, 4115 flow [2024-06-27 17:08:23,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 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 17:08:23,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:23,960 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:08:23,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-27 17:08:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:24,161 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:08:24,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2124203703, now seen corresponding path program 17 times [2024-06-27 17:08:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75226569] [2024-06-27 17:08:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:24,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:24,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75226569] [2024-06-27 17:08:24,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75226569] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:08:24,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666263048] [2024-06-27 17:08:24,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:08:24,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:24,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:24,804 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 17:08:24,805 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 17:08:24,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-06-27 17:08:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:08:24,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 17:08:24,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:08:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-06-27 17:08:25,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:08:25,155 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:08:25,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-06-27 17:08:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-06-27 17:08:25,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666263048] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:08:25,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:08:25,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 28 [2024-06-27 17:08:25,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436394949] [2024-06-27 17:08:25,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:08:25,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 17:08:25,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 17:08:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2024-06-27 17:08:25,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 17:08:25,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 258 transitions, 4115 flow. Second operand has 29 states, 29 states have (on average 8.206896551724139) internal successors, (238), 29 states have internal predecessors, (238), 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 17:08:25,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:25,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 17:08:25,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand